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Home> Hot Product Listed C   > Chromium oxide

Chromium oxide

CAS No.:1308-38-9
EINECS(EC#):215-160-9
Molecular Weight:151.99
Molecular Formula:Cr2O3 (Products with the same molecular formula)
MOL File:1308-38-9.mol
Names and Identifiers
Synonyms

Dichromium trioxideChromium oxideChrome greenChromiaChromium sesquioxideChromium(III) oxideEskolaite

Inchi
InChI=1/2Cr.3O
InChkey
QDOXWKRWXJOMAK-UHFFFAOYSA-N
Canonical Smiles
O=[Cr](=O)=O
Properties
Appearance
green crystalline powder
Density
5.21
Melting Point
2435℃
Boiling Point
4000℃
Refractive Index
2.551
Flash Point
3000oC
Water
Insoluble
Solubilities
Insoluble
Color/Form
Dark red, bipyramidal prismatic crystals, flakes or granular powder
BROWN SOLID
Flake, ground powder form
Dark-red ... flakes or powder [Note: Often used in an aqueous solution (H2CrO4)].
Stability
Stable.
HS Code
28199090
Storage temp
Do not store near combustible materials. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Safety and Handling
Hazard Codes
Toxic by ingestion and inhalation. TLV: 0.5 mg/m3.
Safety Statements
S24/25
Safety

Safety Statements:? 24/25: Avoid contact with skin and eyes.?
HS Code:? 28199090
Confirmed carcinogen with experimental tumorigenic data. Mutation data reported. Probably a severe eye, skin, and mucous membrane irritant. A powerful oxidizer. Reacts violently with CLF3.

Skin, Eye, and Respiratory Irritations
Very irritating to eyes and respiratory tract.
Probably a severe eye, skin, & mucous membrane irritant.
Fire Fighting Procedures
USE WATER; HOWEVER, THE DECOMPOSING MATERIAL WILL FORM A HOT VISCOUS FOAM & CAUTION SHOULD BE EXERCISED AGAINST POSSIBILITY OF STEAM EXPLOSION.
PERSONAL PROTECTION: WEAR FULL PROTECTIVE CLOTHING.
Fire Potential
POWERFUL OXIDIZER ... CONTACT WITH COMBUSTIBLE MATERIAL MAY CAUSE FIRE.
Ignites on contact with alcohls, acetic anhydride + tetrahydronaphthalene, acetone, butanol, chromium(II) sulfide, cyclohexanol, dimethyl formamide, ethanol, ethylene glycol, methanol, 2-propanol, pyridine.
Formulations/Preparations
Technical: technical flake 99.75%
Crystal grade, high purity, less dust
DOT Emergency Guidelines
/GUIDE 141: OXIDIZERS - TOXIC/ Fire or Explosion: These substances will accelerate burning when involved in a fire. May explode from heat or contamination. Some may burn rapidly. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard. /Chromium trioxide, anhydrous/
/GUIDE 141: OXIDIZERS - TOXIC/ Health: Toxic by ingestion. Inhalation of dust is toxic. Fire may produce irritating, corrosive and/or toxic gases. Contact with substance may cause severe burns to skin and eyes. Runoff from fire control or dilution water may cause pollution. /Chromium trioxide, anhydrous/
/GUIDE 141: OXIDIZERS - TOXIC/ Public Safety: CALL Emergency Response Telephone Number ... . As an immediate precautionary measure, isolate spill or leak in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. Keep unauthorized personnel away. Stay upwind. Keep out of low areas. Ventilate closed spaces before entering. /Chromium trioxide, anhydrous/
/GUIDE 141: OXIDIZERS - TOXIC/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing will only provide limited protection. /Chromium trioxide, anhydrous/
/GUIDE 141: OXIDIZERS - TOXIC/ Evacuation: Large spill: Consider initial downwind evacuation for at least 100 meters (330 feet). Fire: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. /Chromium trioxide, anhydrous/
/GUIDE 141: OXIDIZERS - TOXIC/ Fire: Small fires: Use water. Do not use dry chemicals or foams. CO2 or Halon may provide limited control. Large fires: Flood fire area with water from a distance. Move containers from fire area if you can do it without risk. Do not move cargo or vehicle if cargo has been exposed to heat. Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn. /Chromium trioxide, anhydrous/
/GUIDE 141: OXIDIZERS - TOXIC/ Spill or Leak: Keep combustibles (wood, paper, oil, etc.) away from spilled material. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Small dry spills: With clean shovel place material into clean, dry container and cover loosely; move containers from spill area. Large spills: Dike far ahead of spill for later disposal. /Chromium trioxide, anhydrous/
/GUIDE 141: OXIDIZERS - TOXIC/ First Aid: Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. Contaminated clothing may be a fire risk when dry. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. Keep victim warm and quiet. Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves. /Chromium trioxide, anhydrous/
Reactivities and Incompatibilities
Acetylene is oxidized violently.
Stirring chromium trioxide (added in small portions) with unheated /hexamethylphosphoramide/ leads to the formation of a complex useful for oxidizing alcohols to carbonyl derivatives. The trioxide must not be crushed before being added to the solvent, because violent decomposition may then occur.
Arsenic reacts with chromium trioxide with incandescence.
Ignition occurs when chromium trioxide comes in contact with a small portion of chromium sulfide.
Reacts violently with diethyl ether at room temperature.
Sodium or potassium reacts with chromium trioxide with incandescence.
Mixed with potassium ferricyanide an explosion occurred when the dust was ignited by a spark.
During the preparation of a chromium trioxide-pyridine complex, the proportion of the trioxide was increased. Since the trioxide dissolves in the pyridine by swelling, then rapidly dissolving with the evolution of heat, the excessive amount of chromium trioxide produced overheating, which resulted in an explosion and fire.
Selenium reacts violently with chromium trioxide.
INCOMPATIBILITIES: PHARMACEUTICAL INCOMPATIBILITY: ALCOHOL, ETHER, GLYCEROL, SPIRIT NITROUS ETHER, & ALMOST EVERY ORGANIC SUBSTANCE; BROMIDES, CHLORIDES, IODIDES, HYPOPHOSPHITES, SULFITES, & SULFIDES.
AN ATTEMPT TO PREPARE A 10% WT SOLN OF CHROMIC TRIOXIDE IN N,N-DIMETHYLFORMAMIDE PRODUCED AN ALMOST INSTANTANEOUS INFLAMMATION, FOLLOWED BY AN ERUPTION WHICH FORCIBLY EJECTED THE CONTENTS OF THE FLASK ONTO THE INNER WALLS OF THE FUME HOOD.
IN THE REPORT OF AN EXPLOSION OF MIXTURES OF POTASSIUM PERMANGANATE & CHROMIC TRIOXIDE BY CH HEATHCOCK (CHEM ENG NEWS 59 (8): 9 (1981)). DAUBEN ET AL (J ORG CHEM (34): 3587 (1969)), & RATCLIFFE & RODEHURST (J ORG CHEM (35): 4000 (1970)) STATE THAT COOLING & STIRRING ARE REQUIRED & THAT CHROMIC TRIOXIDE IS ADDED TO THE PYRIDINE IN CHLOROFORM SOLN. THE PYRIDINE IS NEVER ADDED TO CHROMIC TRIOXIDE. AN ACETONE-ICE BATH, PROPER STIRRING, & PROPER MIXING OF REAGENTS ARE NEEDED FOR SAFE HANDLING OF THESE OXIDATION SYSTEMS.
CAN REACT EXPLOSIVELY WITH ACETIC ANHYDRIDE, ACETIC ACID, ETHYL ACETATE, ISOAMYL ALCOHOL, & BENZALDEHYDE. LESS HAZARDOUS WITH ETHYLENE GLYCOL, FURFURAL, GLYCEROL, & METHANOL.
CAN REACT VIOLENTLY WITH MOST METAL POWDERS, AMMONIA & AMMONIUM SALTS, PHOSPHORUS, MANY FINELY DIVIDED ORGANIC CMPD, FLAMMABLE LIQUIDS, ACIDS, & SULFUR.
BENZENE MAY REACT VIGOROUSLY WITH OXIDIZING AGENTS SUCH AS ... CHROMIC ACID ...
Bromine pentafluoride ... contact with /chromium trioxide/ at ambient or slightly elevated temp is violent, ignition often occurring ... .
Violence of reaction depends on concn of ... /peroxyformic acid/ and scale and proportion of reactants. The following ... /observation was/ made with additions to 2-3 drops of ca 90% acid. ... Impure chromium trioxide ... cause violent decomp, sometimes accelerating to explosion.
In a study of hypergolic ignition of ethylene glycol by oxidants, chromium trioxide ... caused ignition on contact at ambient temp ... .
Interaction of the two oxidants /chromium trioxide & chlorine trifluoride/ is incandescent.
Presence of nitric acid or nitrates in chromium trioxide may cause oxidation reactions to accelerate out of control ... .
A mixture of chromium trioxide and butyric acid became incandescent on heating to 100 deg C.
During oxidation of a sec-alcohol to ketone in cold /dimethylformamide/ soln, addition of solid trioxide caused ignition. Addition of lumps of trioxide was later found to cause local ignition on addition to ice-cooled dimethylformamide under nitrogen. Addition of 2 g of chromium trioxide to 18 ml of solvent to form a 10 wt % soln caused immediate ignition and ejection of the flask contents.
Contact of the trioxide with the aprotic amide solvent /1,3-dimethylhexahydropyrimidone/ (dimethylpropyleneurea) is always explosive, with fire ... .
Hydrogen sulfide ... contact with the heated ... /chromium trioxide/ causes incandescence.
Combustible materials may ignite or explode on contact with ... /chromium trioxide/. A few drops of oil which fell into a container of the oxide led to an explosion which produced fatal burns. ... If a few drops of 2-butanone ... contact solid chromium trioxide, a few seconds' delay ensues while some of the oxidant attains the critical temp of 330 deg C. Then combustion occurs with enough vigor to raise a fire-ball several feet, and spattering also occurs.
... Butanol, isobutanol, acetaldehyde, propionaldehyde, butylaldehyde, benzaldehyde, acetic acid, pelargonic acid, ethyl acetate, isopropyl acetate, pentyl acetate, diethylether, methyldioxane, dimethyldioxane, acetone and benzylethlyaniline /cause possible ignition hazards/.
Phosphorus and the molten /chromium/ trioxide react explosively.
Mixtures of ... /potassium hexacyanoferrate/ and chromium trioxide explode and inflame when heated above 196 deg C. Friction alone is sufficient to ignite violently the mixture when ground with silver sand.
A mixture /sulfur & chromium trioxide/ ignites on warming.
POWERFUL OXIDIZER; OXIDIZES ALCOHOL AND MOST OTHER ORGANIC SUBSTANCES, SOMETIMES WITH DANGEROUS VIOLENCE.
Other Preventative Measures
Apply petrolatum or paraffin oils to nose before exposure.
The worker should immediately wash the skin when it becomes contaminated.
SRP: Local exhaust ventilation should be applied wherever there is an incidence of point source emissions or dispersion of regulated contaminants in the work area. Ventilation control of the contaminant as close to its point of generation is both the most economical and safest method to minimize personnel exposure to airborne contaminants.
SRP: Contaminated protective clothing should be segregated in such a manner so that there is no direct personal contact by personnel who handle, dispose, or clean the clothing. Quality assurance to ascertain the completeness of the cleaning procedures should be implemented before the decontaminated protective clothing is returned for reuse by the workers. Contaminated clothing should not be taken home at end of shift, but should remain at employee's place of work for cleaning.
SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.
Work clothing that becomes wet or significantly contaminated should be removed and replaced.
Workers whose clothing may have become contaminated should change into uncontaminated clothing before leaving the work premises.
Protective Equipment and Clothing
Wear appropriate personal protective clothing to prevent skin contact.
Wear appropriate eye protection to prevent eye contact.
Eyewash fountains should be provided in areas where there is any possibility that workers could be exposed to the substance; this is irrespective of the recommendation involving the wearing of eye protection.
Facilities for quickly drenching the body should be provided within the immediate work area for emergency use where there is a possibility of exposure. [Note: It is intended that these facilities provide a sufficient quantity or flow of water to quickly remove the substance from any body areas likely to be exposed. The actual determination of what constitutes an adequate quick drench facility depends on the specific circumstances. In certain instances, a deluge shower should be readily available, whereas in others, the availability of water from a sink or hose could be considered adequate.]
Recommendations for respirator selection. Condition: At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration. Respirator Class(es): Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive pressure mode. Any supplied-air respirator that has a full facepiece and is operated in pressure-demand or other positive pressure mode in combination with an auxiliary self-contained breathing apparatus operated in pressure-demand or other positive pressure mode.
Recommendations for respirator selection. Condition: Escape from suddenly occurring respiratory hazards: Respirator Class(es): Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter. Any appropriate escape-type, self-contained breathing apparatus.
Specification

In nature, Chromium(III) oxide (1308-38-9)occurs as the rare mineral eskolaite. which is found in chromium-rich termolite skarns, metaquartzites, and chlorite veins.
Chromium(III) oxide is amphoteric. Although insoluble in water, It dissolves in concentrated alkali to yield chromite ions, it dissolves in acid to produce hydrated chromium ions, [Cr(H2O)6]3+. When heated finely divided aluminium or carbon, it is reduced to chromium metal and aluminum oxide:
Cr2O3 + 2Al → 2Cr + Al2O3
Heating with chlorine and carbon yields chromium(III) chloride:
Cr2O3 + 3Cl2 + 3C → 2CrCl3 + 3CO
Other informations about Chromium(III) oxide:
1、Fire Fighting Measures
General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Substance is noncombustible.?
Extinguishing Media: Use extinguishing media most appropriate for the surrounding fire.?
2、Handling and Storage of?Chromium(III) oxide (1308-38-9)
Handling: Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.?
Storage: Store in a cool, dry place. Store in a tightly closed container.??

Report

Reported in EPA TSCA Inventory. Chromium and its compounds are on the Community Right-To-Know List.

Disposal Methods
SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.
Chemical reduction of concentrated materials to Cr (III) and precipitation by pH adjustment. Precipitates are normally disposed in a chemical waste landfill. Recovery and recycle is a viable alternative to disposal for chromium in plating wastes, tannery wastes, cooling tower blowdown and chemical plant wastes. Recommendable methods: Reduction & precipitation. Not recommendable method: Landfill. Peer-review: Cr (VI) can be removed from soln of low acidity by ion exchange. This can allow recovery of Cr (VI), or the resin can be solidified and disposed of to a landfill. Do not landfill chromium trioxide. Contact with combustible material may cause fire. (Peer-review conclusions of an IRPTC expert consultation (May 1985))
Wastewater treatment sludge from the production of chrome green pigments is a poor candidate for incineration. /Chrome green pigments/
Reach Info
This substance has been officially registered by enterprises.
ECHA (EU chemicals Management Agency) published the completed registration file as follows:
Completed registration file:
Registered as ubmitted Total tonnage band  
FULL JOINT 10000PLUS view >
Registered companies:
Registrant / Supplier details Latest dossier received
"Alwernia" Spółka Akcyjna 2013
AMG Superalloys UK Limited 2010
BASF SE 2016
more >
MSDS

Download/Modify | Technical supported by XiXisys.com. For US version, EU version (23 languages) and more, please refer to xixisys.com/en/sds/search

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017

1.Identification

1.1 GHS Product identifier

Product name dichromium trioxide

1.2 Other means of identification

Product number -
Other names Chromium oxide

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Abrasives,Intermediates,Pigments,Plating agents and surface treating agents,Processing aids, specific to petroleum production
Uses advised against no data available

1.4 Supplier's details

Company WWW.GuideChem.COM
Address 8F, Block C, No.3 Building, Zijin Plaza, No.701, Gudun Road, Hangzhou, Zhejiang 310030, China
Telephone +86-571-89739798
Fax 86(21)54365166

1.5 Emergency phone number

Emergency phone number +86-571-89739798
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

2.Hazard identification

2.1 Classification of the substance or mixture

Not classified.

2.2 GHS label elements, including precautionary statements

Pictogram(s) No symbol.
Signal word

No signal word.

Hazard statement(s)

none

Precautionary statement(s)
Prevention

none

Response

none

Storage

none

Disposal

none

2.3 Other hazards which do not result in classification

none

3.Composition/information on ingredients

3.1 Substances

Chemical name Common names and synonyms CAS number EC number Concentration
dichromium trioxide dichromium trioxide 1308-38-9 none 100%

4.First-aid measures

4.1 Description of necessary first-aid measures

General advice

Consult a physician. Show this safety data sheet to the doctor in attendance.

If inhaled

Fresh air, rest.

In case of skin contact

Rinse skin with plenty of water or shower.

In case of eye contact

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

If swallowed

Rinse mouth.

4.2 Most important symptoms/effects, acute and delayed

no data available

4.3 Indication of immediate medical attention and special treatment needed, if necessary

/SRP:/ Immediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR as necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Inorganic acids and related compounds/

5.Fire-fighting measures

5.1 Extinguishing media

Suitable extinguishing media

Wear self-contained breathing apparatus for firefighting if necessary

5.2 Specific hazards arising from the chemical

no data available

5.3 Special protective actions for fire-fighters

Wear self-contained breathing apparatus for firefighting if necessary.

6.Accidental release measures

6.1 Personal precautions, protective equipment and emergency procedures

Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8.

6.2 Environmental precautions

Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting.

6.3 Methods and materials for containment and cleaning up

ACCIDENTAL RELEASE MEASURES; Personal precautions, protective equipment and emergency procedures: Use personal protective equipment. Avoid dust formation. Avoid breathing vapors, mist or gas. Ensure adequate ventilation. Avoid breathing dust. Environmental precautions: Do not let product enter drains. Methods and materials for containment and cleaning up: Pick up and arrange disposal without creating dust. Sweep up and shovel. Keep in suitable, closed containers for disposal.

7.Handling and storage

7.1 Precautions for safe handling

Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Avoid exposure - obtain special instructions before use.Provide appropriate exhaust ventilation at places where dust is formed. For precautions see section 2.2.

7.2 Conditions for safe storage, including any incompatibilities

Keep container tightly closed in a dry and well-ventilated place. Hygroscopic Handle and store under inert gas. Keep in a dry place. Storage class (TRGS 510): Non Combustible Solids

8.Exposure controls/personal protection

8.1 Control parameters

Occupational Exposure limit values

Recommended Exposure Limit: 10-hour Time-Weighted Average: 0.5 mg/cu m. /Chromium(III) compounds (as Cr)/

Biological limit values

no data available

8.2 Appropriate engineering controls

Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday.

8.3 Individual protection measures, such as personal protective equipment (PPE)

Eye/face protection

Safety glasses with side-shields conforming to EN166. Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).

Skin protection

Wear impervious clothing. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique(without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it.

Respiratory protection

Wear dust mask when handling large quantities.

Thermal hazards

no data available

9.Physical and chemical properties

Physical state green crystalline powder
Colour Light to dark green, fine, hexagonal crystals
Odour no data available
Melting point/ freezing point 2435\u00baC
Boiling point or initial boiling point and boiling range 4000\u00baC
Flammability Not combustible.
Lower and upper explosion limit / flammability limit no data available
Flash point 3000\u00baC
Auto-ignition temperature no data available
Decomposition temperature no data available
pH Trivalent chromium compounds are amphoteric
Kinematic viscosity no data available
Solubility In water:Insoluble
Partition coefficient n-octanol/water (log value) no data available
Vapour pressure no data available
Density and/or relative density 5.21
Relative vapour density no data available
Particle characteristics no data available

10.Stability and reactivity

10.1 Reactivity

no data available

10.2 Chemical stability

Stable under recommended storage conditions.

10.3 Possibility of hazardous reactions

no data available

10.4 Conditions to avoid

no data available

10.5 Incompatible materials

The reaction of lithium and chromic oxide occurs around 180\u00b0C with consequent temperature rise to 965\u00b0C.

10.6 Hazardous decomposition products

no data available

11.Toxicological information

Acute toxicity

  • Oral: no data available
  • Inhalation: no data available
  • Dermal: no data available

Skin corrosion/irritation

no data available

Serious eye damage/irritation

no data available

Respiratory or skin sensitization

no data available

Germ cell mutagenicity

no data available

Carcinogenicity

WEIGHT OF EVIDENCE CHARACTERIZATION: Applying the criteria for evaluating the overall weight of evidence for carcinogenicity to humans outlined in EPA's guidelines for risk assessment (1986), trivalent chromium is most appropriately designated a Group D -- Not classified as to its human carcinogenicity. Using the Proposed Guidelines for Carcinogen Risk Assessment (1996), there are inadequate data to determine the potential carcinogenicity of trivalent chromium ... However, the classification of hexavalent chromium as a known human carcinogen raises a concern for the carcinogenic potential of trivalent chromium. HUMAN CARCINOGENICITY DATA: Occupational exposure to trivalent chromium and other chromium compounds by inhalation has been studied in the chromate manufacturing and ferrochromium industries; however, exposures all include mixed exposures to both Cr(III) and Cr(VI). Cr(VI) species is the likely etiological agent in reports of excess cancer risk in chromium workers. Data addressing exposures to Cr(III) alone are not available and data are inadequate for an evaluation of human carcinogenic potential. ... ANIMAL CARCINOGENICITY DATA: The data from oral and inhalation exposures of animals to trivalent chromium do not support documentation of the carcinogenicity of trivalent chromium. IARC concluded that animal data are inadequate for the evaluation of the carcinogenicity of Cr(III) compounds. Furthermore, although there is sufficient evidence of respiratory carcinogenicity associated with exposure to chromium, the relative contribution of Cr(III), Cr(VI), metallic chromium, or soluble versus insoluble chromium to carcinogenicity cannot be elucidated... /Chromium (III), insoluble salts/

Reproductive toxicity

no data available

STOT-single exposure

no data available

STOT-repeated exposure

no data available

Aspiration hazard

no data available

12.Ecological information

12.1 Toxicity

  • Toxicity to fish: no data available
  • Toxicity to daphnia and other aquatic invertebrates: no data available
  • Toxicity to algae: no data available
  • Toxicity to microorganisms: no data available

12.2 Persistence and degradability

no data available

12.3 Bioaccumulative potential

no data available

12.4 Mobility in soil

no data available

12.5 Other adverse effects

no data available

13.Disposal considerations

13.1 Disposal methods

Product

The material can be disposed of by removal to a licensed chemical destruction plant or by controlled incineration with flue gas scrubbing. Do not contaminate water, foodstuffs, feed or seed by storage or disposal. Do not discharge to sewer systems.

Contaminated packaging

Containers can be triply rinsed (or equivalent) and offered for recycling or reconditioning. Alternatively, the packaging can be punctured to make it unusable for other purposes and then be disposed of in a sanitary landfill. Controlled incineration with flue gas scrubbing is possible for combustible packaging materials.

14.Transport information

14.1 UN Number

ADR/RID: Not dangerous goods. IMDG: Not dangerous goods. IATA: Not dangerous goods.

14.2 UN Proper Shipping Name

ADR/RID: unknown
IMDG: unknown
IATA: unknown

14.3 Transport hazard class(es)

ADR/RID: Not dangerous goods. IMDG: Not dangerous goods. IATA: Not dangerous goods.

14.4 Packing group, if applicable

ADR/RID: Not dangerous goods. IMDG: Not dangerous goods. IATA: Not dangerous goods.

14.5 Environmental hazards

ADR/RID: no IMDG: no IATA: no

14.6 Special precautions for user

no data available

14.7 Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code

no data available

15.Regulatory information

15.1 Safety, health and environmental regulations specific for the product in question

Chemical name Common names and synonyms CAS number EC number
dichromium trioxide dichromium trioxide 1308-38-9 none
European Inventory of Existing Commercial Chemical Substances (EINECS) Listed.
EC Inventory Listed.
United States Toxic Substances Control Act (TSCA) Inventory Listed.
China Catalog of Hazardous chemicals 2015 Not Listed.
New Zealand Inventory of Chemicals (NZIoC) Listed.
Philippines Inventory of Chemicals and Chemical Substances (PICCS) Listed.
Vietnam National Chemical Inventory Listed.
Chinese Chemical Inventory of Existing Chemical Substances (China IECSC) Listed.

16.Other information

Information on revision

Creation Date Aug 12, 2017
Revision Date Aug 12, 2017

Abbreviations and acronyms

  • CAS: Chemical Abstracts Service
  • ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
  • RID: Regulation concerning the International Carriage of Dangerous Goods by Rail
  • IMDG: International Maritime Dangerous Goods
  • IATA: International Air Transportation Association
  • TWA: Time Weighted Average
  • STEL: Short term exposure limit
  • LC50: Lethal Concentration 50%
  • LD50: Lethal Dose 50%
  • EC50: Effective Concentration 50%

References

  • IPCS - The International Chemical Safety Cards (ICSC), website: http://www.ilo.org/dyn/icsc/showcard.home
  • HSDB - Hazardous Substances Data Bank, website: https://toxnet.nlm.nih.gov/newtoxnet/hsdb.htm
  • IARC - International Agency for Research on Cancer, website: http://www.iarc.fr/
  • eChemPortal - The Global Portal to Information on Chemical Substances by OECD, website: http://www.echemportal.org/echemportal/index?pageID=0&request_locale=en
  • CAMEO Chemicals, website: http://cameochemicals.noaa.gov/search/simple
  • ChemIDplus, website: http://chem.sis.nlm.nih.gov/chemidplus/chemidlite.jsp
  • ERG - Emergency Response Guidebook by U.S. Department of Transportation, website: http://www.phmsa.dot.gov/hazmat/library/erg
  • Germany GESTIS-database on hazard substance, website: http://www.dguv.de/ifa/gestis/gestis-stoffdatenbank/index-2.jsp
  • ECHA - European Chemicals Agency, website: https://echa.europa.eu/

Disclaimer: The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. We as supplier shall not be held liable for any damage resulting from handling or from contact with the above product.

Computational chemical data

Molecular Weight:99.9943 [g/mol]
Molecular Formula:CrO3
H-Bond Donor:0
H-Bond Acceptor:3
Rotatable Bond Count:0
Exact Mass:99.925256
MonoIsotopic Mass:99.925256
Topological Polar Surface Area:51.2
Heavy Atom Count:4
Formal Charge:0
Complexity:61.8
Isotope Atom Count:0
Defined Atom Stereocenter Count:0
Undefined Atom Stereocenter Count:0
Defined Bond Stereocenter Count:0
Undefined Bond Stereocenter Count:0
Covalently-Bonded Unit Count:1