3D Mol Similar

Zinc chromate

: Iupac Name：zinc;dioxido(dioxo)chromium; CAS No.: 13530-65-9; Molecular Weight：181.37400; Modify Date.: 2022-11-10 21:53; Introduction: Zinc Chromate is a zinc salt of chromate. As a corrosion inhibitor, it is used industrially in chromate conversion coatings, which was developed by the Ford Motor Company in the 1920s. Its major application is used as a coating over iron or aluminum materials in industrial painting with corrosion resistance. It is also used in spray paints, artists'paints, pigments in varnishes, metal surface treatment and in making linoleum. Its putty form can be used as sealant in addition to two O-rings between sections of the failed solid rocket booster on Space Shuttle Challenger. However, it was concerned that it is a potential carcinogen, which can induce chromosome instability and DNA double-strand breaks. View more+

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1. Names and Identifiers

: 1.1 Name; Zinc chromate; 1.2 Synonyms; basiczincchromate buttercupyellow c.i.77955 chromicacid(h2cro4),zincsalt(1:1) chromicacid,zincsalt Chromicacid,zincsalt(1:1) chromiumzincoxide(zrcro4) ci77955 EINECS 236-878-9 MFCD00036281; View all

1.3 CAS No.: 13530-65-9

1.4 CID: 26089

1.5 EINECS(EC#): 236-878-9; 609-398-6

1.6 Molecular Formula: CrO4Zn (isomer)

1.7 Inchi: InChI=1S/Cr.4O.Zn/q;;;2*-1;+2

1.8 InChIkey: NDKWCCLKSWNDBG-UHFFFAOYSA-N

1.9 Canonical Smiles: [O-][Cr](=O)(=O)[O-].[Zn+2]

1.10 Isomers Smiles: [O-][Cr](=O)(=O)[O-].[Zn+2]

2. Properties

2.1 Density: 3,4 g/cm3

2.1 Melting point: 316ºC

2.1 Boiling point: 316°C

2.1 Flash Point: °C

2.1 Precise Quality: 179.84900

2.1 PSA: 80.26000

2.1 logP: -0.47770

2.1 AnalyticLaboratory Methods: Nonflammable. Use agent suitable for surrounding fire.

2.2 Appearance: YELLOW CRYSTALLINE POWDER.

2.3 Storage: Ambient temperatures.

2.4 Chemical Properties: Zinc chromate is a yellow crystalline powder.

2.5 Color/Form: LEMON-YELLOW PRISMS

2.6 Decomposition: Substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

2.7 Odor: Odorless

2.8 PH: ... hexavalent chromium; compounds are acidic

2.9 Physical: ZINC CHROMATE; is an odorless yellow solid. Sinks in water;. (USCG, 1999)

2.10 Water Solubility: INSOLUBLE IN COLD WATER; SOLUBLE IN ACID, LIQUID AMMONIA; INSOLUBLE IN ACETONE
Sparingly sol in water

2.11 Toxicity Summary: IDENTIFICATION AND USE: Zinc chromate; is a lemon-yellow powder. Zinc chromates are employed primarily in priming paints used for metals, for which they provide resistance against corrosion. HUMAN EXPOSURE AND TOXICITY: Development of dermatitis from exposure to zinc chromate; has been reported, but such instances are rare. An outbreak of hand dermatitis was reported amongst employees working on a new assembly line of an electronics factory. Twenty-four out of 41 employees had signs of irritant contact dermatitis. The fingertips and the dorsal parts of the hands were especially affected. In 1975, five manufacturers of chromate; pigment (including zinc chromate;) in Japan were examined in a study of the carcinogenicity of chromates. None of the results showed statistically significant differences that would suggest an excess risk for malignant neoplasms, particularly lung cancer, among workers engaged in the manufacture of chromate; pigment in Japan. However, several other studies of workers exposed to chromium; compounds have suggested an increased incidence of respiratory cancers. Lead and zinc chromates were among the chromium; compounds implicated. A study was done in a pigment plant in Newark, New Jersey, USA, which utilized both of these compounds. Observed deaths from each cause were compared with expected deaths. A statistically significant relative risk of 1.6 for lung cancer was found. An increased incidence of lung cancer was also evident. A small cohort of Norwegian male workers were studied from a company which produced zinc chromate; paint. They found 3 cases of bronchial carcinoma (in workers aged 41, 51, and 59) where only 0.079 was expected for the total period of observation. The three cases had six to nine years of exposure to zinc chromate; dust levels of approximately 0.5 to 1.5 mg Cr/cu m. Two of the three carcinomas were found in smokers. There was also one case of nasal cancer in a man with a total of 3 months of exposure. In a study of zinc chromate; spray painters and electroplaters at two large aircraft maintenance facilities, the relative excess for respiratory cancer among spray painters (21 observed vs 11.4 expected) was statistically significant. The ability of chronic exposure to zinc chromate; to induce numerical chromosome instability was tested in human lung fibroblasts. The study found no increase in aneuploidy after a 24 hr exposure to zinc chromate;, but with more chronic exposures, zinc chromate; induced concentration- and time-dependent increases in aneuploidy in the form of hypodiploidy, hyperdiploidy, and tetraploidy. Zinc chromate; also induced centrosome amplification in a concentration- and time-dependent manner in both interphase and mitotic cells after chronic exposure, producing cells with centriolar defects. Furthermore, chronic exposure to zinc chromate; induced concentration- and time-dependent increases in spindle assembly checkpoint bypass with increases in centromere spreading, premature centromere division, and premature anaphase. All together, these data indicate that zinc chromate; can induce chromosome instability after prolonged exposures. In human brochial cells zinc chromate; was more clastogenic than all other chromium; compounds. ANIMAL STUDIES: Six intratracheal injections of zinc chromate; were given at 6 week intervals to 62 mice, which were observed until their death. No pulmonary carcinomas were found; pulmonary adenomas occurred in 31/62 exposed, in 7/18 untreated control and in 0/2 zinc carbonate;-treated control animals. Pulmonary adenomas occurred in 1 of 21 guinea pigs that were given 6 intratracheal instillations of zinc chromate;, no pulmonary adenomas occurred in controls. Chromium; containing materials were examined for carcinogenic activity in a two-year study using an intrabronchial pellet implantation system whereby pellets loaded with test material were surgically implanted into the lower left bronchus of rats. Zinc chromate; resulted in bronchial carcinomas in 5/100 rats tested. A further zinc chromate; group produced bronchial carcinomas in 3/100, which was not statistically significant. Zinc chromate; induced forward mutations to 8-azaguanine; resistance in Chinese hamster V79/4 cells. Deaths in cattle believed to have had access to zinc chromate; paste have been recorded in New Zealand. A daily dose of 30-40 mg/kg body weight produced severe chronic poisoning in young calves within one month. The acute lethal dose for adult cattle is about 20 times this amount. The outstanding clinical feature of the condition produced was profuse scouring, leading in chronic cases to severe dehydration and a low terminal blood pressure. Changes in the alimentary tract were the most marked post mortem finding. In acute poisoning, there was severe congestion and inflammation throughout the intestines and sloughing of the gastric mucous membranes. In chronic poisoning, congestion and inflammation were present only in the stomach (the rumen and abomasum in particular) showing severe ulceration and near perforation.; View all

3. Use and Manufacturing

3.1 General Description: Odorless yellow solid. Sinks in water.

3.2 GHS Classification: Signal: Danger
GHS Hazard Statements
Aggregated GHS information provided by 72 companies from 3 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Reported as not meeting GHS hazard criteria by 4 of 72 companies. For more detailed information, please visit ECHA C&L website

Of the 2 notification(s) provided by 68 of 72 companies with hazard statement code(s):

H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]
H317 (100%): May cause an allergic skin reaction [Warning Sensitization, Skin]
H350 (97.06%): May cause cancer [Danger Carcinogenicity]
H400 (97.06%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
H410 (100%): Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]

Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown.

Precautionary Statement Codes
P201, P202, P261, P264, P270, P272, P273, P280, P281, P301+P312, P302+P352, P308+P313, P321, P330, P333+P313, P363, P391, P405, and P501; View all

3.3 Methods of Manufacturing: Zinc chromate; is produced by reacting an aqueous slurry of zinc oxide; or hydroxide; with dissolved chromate; ions followed by neutralization, or by precipitation of dissolved zinc; salts with dissolved chromate; salts.

3.4 Potential Exposure: Zinc chromate is used as an anticorrosionpigment in primers and as a coloring agent;as a pigment in surface coatings and linoleum; to impartcorrosion resistance to epoxy laminates.

3.5 Shipping: UN3288 Toxic solids, inorganic, n.o.s., HazardClass: 6.1; Labels: 6.1-Poisonous materials, Technical NameRequired. UN3077 Environmentally hazardous substances,solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardousmaterial, Technical Name Required.

3.6 Usage: Zinc chromate is also called zinc yellow, this pigment is identified as Pigment Yellow 36, as opposed to the lithopone version incorpo- rating barium sulfate which is Pigment Yellow 36:1. It is a bright, green shade of yellow made by the precipitation of hydrated zinc potassium chromate from the reaction of so- dium bichromate with zinc oxide and potassium chloride. The lithopone version is merely a co-precipitate of zinc chromate onto barium sulfate to give an extended pigment that carries the Colour Index name of Pigment Yellow 36:1.Used primarily in corrosion-inhibiting coatings, its poor tinctorial strength and poor resistance to acid and alkali severely limits this pigment's use elsewhere.

4. Safety and Handling

4.1 Hazard Codes: T; N

4.1 Risk Statements: R8

4.1 Safety Statements: S17-S45-S53

4.1 Packing Group: III

4.1 Other Preventative Measures: 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.
PRECAUTIONS FOR "CARCINOGENS": Smoking, drinking, eating, storage of food or of food & beverage containers or utensils, & the application of cosmetics should be prohibited in any laboratory. All personnel should remove gloves, if worn, after completion of procedures in which carcinogens have been used. They should ... wash ... hands, preferably using dispensers of liq detergent, & rinse ... thoroughly. Consideration should be given to appropriate methods for cleaning the skin, depending on nature of the contaminant. No standard procedure can be recommended, but the use of organic solvents should be avoided. Safety pipettes should be used for all pipetting. /Chemical Carcinogens/
PRECAUTIONS FOR "CARCINOGENS": In animal laboratory, personnel should remove their outdoor clothes & wear protective suits (preferably disposable, one-piece & close-fitting at ankles & wrists), gloves, hair covering & overshoes. ... Clothing should be changed daily but ... discarded immediately if obvious contamination occurs ... /also,/ workers should shower immediately. In chemical laboratory, gloves & gowns should always be worn ... however, gloves should not be assumed to provide full protection. Carefully fitted masks or respirators may be necessary when working with particulates or gases, & disposable plastic aprons might provide addnl protection. If gowns are of distinctive color, this is a reminder that they should not be worn outside of lab. /Chemical Carcinogens/
PRECAUTIONS FOR "CARCINOGENS": ... Operations connected with synth & purification ... should be carried out under well-ventilated hood. Analytical procedures ... should be carried out with care & vapors evolved during ... procedures should be removed. ... Expert advice should be obtained before existing fume cupboards are used ... & when new fume cupboards are installed. It is desirable that there be means for decreasing the rate of air extraction, so that carcinogenic powders can be handled without ... powder being blown around the hood. Glove boxes should be kept under negative air pressure. Air changes should be adequate, so that concn of vapors of volatile carcinogens will not occur. /Chemical Carcinogens/
PRECAUTIONS FOR "CARCINOGENS": Vertical laminar-flow biological safety cabinets may be used for containment of in vitro procedures ... provided that the exhaust air flow is sufficient to provide an inward air flow at the face opening of the cabinet, & contaminated air plenums that are under positive pressure are leak-tight. Horizontal laminar-flow hoods or safety cabinets, where filtered air is blown across the working area towards the operator, should never be used ... Each cabinet or fume cupboard to be used ... should be tested before work is begun (eg, with fume bomb) & label fixed to it, giving date of test & avg air-flow measured. This test should be repeated periodically & after any structural changes. /Chemical Carcinogens/
PRECAUTIONS FOR "CARCINOGENS": Principles that apply to chem or biochem lab also apply to microbiological & cell-culture labs ... Special consideration should be given to route of admin. ... Safest method of administering volatile carcinogen is by injection of a soln. Admin by topical application, gavage, or intratracheal instillation should be performed under hood. If chem will be exhaled, animals should be kept under hood during this period. Inhalation exposure requires special equipment. ... Unless specifically required, routes of admin other than in the diet should be used. Mixing of carcinogen in diet should be carried out in sealed mixers under fume hood, from which the exhaust is fitted with an efficient particulate filter. Techniques for cleaning mixer & hood should be devised before expt begun. When mixing diets, special protective clothing &, possibly, respirators may be required. /Chemical Carcinogens/
PRECAUTIONS FOR "CARCINOGENS": When ... admin in diet or applied to skin, animals should be kept in cages with solid bottoms & sides & fitted with a filter top. When volatile carcinogens are given, filter tops should not be used. Cages which have been used to house animals that received carcinogens should be decontaminated. Cage-cleaning facilities should be installed in area in which carcinogens are being used, to avoid moving of ... contaminated /cages/. It is difficult to ensure that cages are decontaminated, & monitoring methods are necessary. Situations may exist in which the use of disposable cages should be recommended, depending on type & amt of carcinogen & efficiency with which it can be removed. /Chemical Carcinogens/
PRECAUTIONS FOR "CARCINOGENS": To eliminate risk that ... contamination in lab could build up during conduct of expt, periodic checks should be carried out on lab atmospheres, surfaces, such as walls, floors & benches, & ... interior of fume hoods & airducts. As well as regular monitoring, check must be carried out after cleaning-up of spillage. Sensitive methods are required when testing lab atmospheres. ... Methods ... should ... where possible, be simple & sensitive. /Chemical Carcinogens/
PRECAUTIONS FOR "CARCINOGENS": Rooms in which obvious contamination has occurred, such as spillage, should be decontaminated by lab personnel engaged in expt. Design of expt should ... avoid contamination of permanent equipment. ... Procedures should ensure that maintenance workers are not exposed to carcinogens. ... Particular care should be taken to avoid contamination of drains or ventilation ducts. In cleaning labs, procedures should be used which do not produce aerosols or dispersal of dust, ie, wet mop or vacuum cleaner equipped with high-efficiency particulate filter on exhaust, which are avail commercially, should be used. Sweeping, brushing & use of dry dusters or mops should be prohibited. Grossly contaminated cleaning materials should not be re-used ... If gowns or towels are contaminated, they should not be sent to laundry, but ... decontaminated or burnt, to avoid any hazard to laundry personnel. /Chemical Carcinogens/
PRECAUTIONS FOR "CARCINOGENS": Doors leading into areas where carcinogens are used ... should be marked distinctively with appropriate labels. Access ... limited to persons involved in expt. ... A prominently displayed notice should give the name of the Scientific Investigator or other person who can advise in an emergency & who can inform others (such as firemen) on the handling of carcinogenic substances. /Chemical Carcinogens/; View all

4.2 Hazard Class: 9

4.2 Cleanup Methods: PRECAUTIONS FOR "CARCINOGENS": A high-efficiency particulate arrestor (HEPA) or charcoal filters can be used to minimize amt of carcinogen in exhausted air ventilated safety cabinets, lab hoods, glove boxes or animal rooms ... Filter housing that is designed so that used filters can be transferred into plastic bag without contaminating maintenance staff is avail commercially. Filters should be placed in plastic bags immediately after removal ... The plastic bag should be sealed immediately ... The sealed bag should be labelled properly ... Waste liquids ... should be placed or collected in proper containers for disposal. The lid should be secured & the bottles properly labelled. Once filled, bottles should be placed in plastic bag, so that outer surface ... is not contaminated ... The plastic bag should also be sealed & labelled. ... Broken glassware ... should be decontaminated by solvent extraction, by chemical destruction, or in specially designed incinerators. /Chemical Carcinogens/; View all

4.3 DisposalMethods: 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.
PRECAUTIONS FOR "CARCINOGENS": There is no universal method of disposal that has been proved satisfactory for all carcinogenic compounds & specific methods of chem destruction ... published have not been tested on all kinds of carcinogen-containing waste. ... summary of avail methods & recommendations ... /given/ must be treated as guide only. /Chemical Carcinogens/
PRECAUTIONS FOR "CARCINOGENS": ... Incineration may be only feasible method for disposal of contaminated laboratory waste from biological expt. However, not all incinerators are suitable for this purpose. The most efficient type ... is probably the gas-fired type, in which a first-stage combustion with a less than stoichiometric air:fuel ratio is followed by a second stage with excess air. Some ... are designed to accept ... aqueous & organic-solvent solutions, otherwise it is necessary ... to absorb soln onto suitable combustible material, such as sawdust. Alternatively, chem destruction may be used, esp when small quantities ... are to be destroyed in laboratory. /Chemical Carcinogens/
PRECAUTIONS FOR "CARCINOGENS": HEPA (high-efficiency particulate arrestor) filters ... can be disposed of by incineration. For spent charcoal filters, the adsorbed material can be stripped off at high temp & carcinogenic wastes generated by this treatment conducted to & burned in an incinerator. ... LIQUID WASTE: ... Disposal should be carried out by incineration at temp that ... ensure complete combustion. SOLID WASTE: Carcasses of lab animals, cage litter & misc solid wastes ... should be disposed of by incineration at temp high enough to ensure destruction of chem carcinogens or their metabolites. /Chemical Carcinogens/
PRECAUTIONS FOR "CARCINOGENS": ... Small quantities of ... some carcinogens can be destroyed using chem reactions ... but no general rules can be given. ... As a general technique ... treatment with sodium dichromate in strong sulfuric acid can be used. The time necessary for destruction ... is seldom known ... but 1-2 days is generally considered sufficient when freshly prepd reagent is used. ... Carcinogens that are easily oxidizable can be destroyed with milder oxidative agents, such as saturated soln of potassium permanganate in acetone, which appears to be a suitable agent for destruction of hydrazines or of compounds containing isolated carbon-carbon double bonds. Concn or 50% aqueous sodium hypochlorite can also be used as an oxidizing agent. /Chemical Carcinogens/
PRECAUTIONS FOR "CARCINOGENS": Carcinogens that are alkylating, arylating or acylating agents per se can be destroyed by reaction with appropriate nucleophiles, such as water, hydroxyl ions, ammonia, thiols & thiosulfate. The reactivity of various alkylating agents varies greatly ... & is also influenced by sol of agent in the reaction medium. To facilitate the complete reaction, it is suggested that the agents be dissolved in ethanol or similar solvents. ... No method should be applied ... until it has been thoroughly tested for its effectiveness & safety on material to be inactivated. For example, in case of destruction of alkylating agents, it is possible to detect residual compounds by reaction with 4(4-nitrobenzyl)-pyridine. /Chemical Carcinogens/; View all

4.4 RIDADR: 3087

4.4 Safety Profile: Confirmed humancarcinogen producing lung tumors. Apoison via intravenous route. Humanmutation data reported. See alsoCHROMIUM COMPOUNDS and ZINCCOMPOUNDS.

4.5 Formulations/Preparations: Grades: Technical; CP.
COMMERCIAL, 100%.
ZINC CHROMATE IS AVAILABLE COMMERCIALLY IN THE USA ONLY IN THE FORM OF BASIC ZINC CHROMATE. A TYPICAL ANALYSIS OF BASIC ZINC CHROMATE IS ZINC OXIDE (ZNO) 71.0% BY WEIGHT; CHROMIUM OXIDE (CRO30 17.0%; COMBINED WATER, 10.0%; MOISTURE, 1.5%; AND TOTAL WATER-SOLUBLE SALTS, 0.2%.
Micronized grades, pigment grade

4.6 Incompatibilities: An oxidizer; reacts with reducing agents;combustibles, organic materials. Zinc chromate Preparation Products And Raw materials Preparation Products

4.7 Reactivities and Incompatibilities: Hydrazine is decomposed explosively by chromates. /Chromates/

4.8 Safety: Confirmed human carcinogen producing lung tumors. A poison via intravenous route. Human mutation data reported. See also CHROMIUM COMPOUNDS and ZINC COMPOUNDS.Analytical Methods: For occupational chemical analysis use NIOSH: Chromium Hexavalent, 7024.

4.9 Toxicity: LDLo intravenous in mouse: 30mg/kg

5. MSDS

2.Hazard identification

2.1 Classification of the substance or mixture

Acute toxicity - Oral, Category 4

Skin sensitization, Category 1

Carcinogenicity, Category 1A

Hazardous to the aquatic environment, short-term (Acute) - Category Acute 1

Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 1

2.2 GHS label elements, including precautionary statements

Pictogram(s)
Signal word	Danger
Hazard statement(s)	H302 Harmful if swallowed H317 May cause an allergic skin reaction H350 May cause cancer H410 Very toxic to aquatic life with long lasting effects
Precautionary statement(s)
Prevention	P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P272 Contaminated work clothing should not be allowed out of the workplace. P280 Wear protective gloves/protective clothing/eye protection/face protection. P201 Obtain special instructions before use. P202 Do not handle until all safety precautions have been read and understood. P273 Avoid release to the environment.
Response	P301+P312 IF SWALLOWED: Call a POISON CENTER/doctor/\u2026if you feel unwell. P330 Rinse mouth. P302+P352 IF ON SKIN: Wash with plenty of water/... P333+P313 If skin irritation or rash occurs: Get medical advice/attention. P321 Specific treatment (see ... on this label). P362+P364 Take off contaminated clothing and wash it before reuse. P308+P313 IF exposed or concerned: Get medical advice/ attention. P391 Collect spillage.
Storage	P405 Store locked up.
Disposal	P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification

none

View all

6. Other Information

6.0 Description: Zinc Chromate is a zinc salt of chromate. As a corrosion inhibitor, it is used industrially in chromate conversion coatings, which was developed by the Ford Motor Company in the 1920s. Its major application is used as a coating over iron or aluminum materials in industrial painting with corrosion resistance. It is also used in spray paints, artists'paints, pigments in varnishes, metal surface treatment and in making linoleum. Its putty form can be used as sealant in addition to two O-rings between sections of the failed solid rocket booster on Space Shuttle Challenger. However, it was concerned that it is a potential carcinogen, which can induce chromosome instability and DNA double-strand breaks.

6.1 Uses: Zinc chromate is also called zinc yellow, this pigment is identified as Pigment Yellow 36, as opposed to the lithopone version incorpo- rating barium sulfate which is Pigment Yellow 36:1. It is a bright, green shade of yellow made by the precipitation of hydrated zinc potassium chromate from the reaction of so- dium bichromate with zinc oxide and potassium chloride. The lithopone version is merely a co-precipitate of zinc chromate onto barium sulfate to give an extended pigment that carries the Colour Index name of Pigment Yellow 36:1.
Used primarily in corrosion-inhibiting coatings, its poor tinctorial strength and poor resistance to acid and alkali severely limits this pigment's use elsewhere.

6.2 Referrence

Tencer, Michal (30 September 2006). "Electrical conductivity of chromate conversion coating on electrodeposited zinc". Applied Surface Science. 252 (23): 8229–8234.
J.A. Hickman (1997). Polymeric Seals and Sealing Technology. iSmithers Rapra Publishing. p. 25. ISBN 978-1-85957-096-8. Retrieved 24 March 2011.
Xie, Hong, et al. "Zinc Chromate Induces Chromosome Instability and DNA Double Strand Breaks in Human Lung Cells." Toxicology & Applied Pharmacology 234.3(2009):293-9.

6.3 Uses: Zinc yellow has the composition 4ZnCrO4 ? K2O ? H2O. Two other yellow chromate pigments are strontium chromate and barium chromate, both used as corrosion inhibitors.

6.4 Chemical Properties: Yellow powder

6.5 Chemical Properties: Zinc chromate is a yellow crystalline powder.

6.6 General Description: Odorless yellow solid. Sinks in water.

6.7 Reactivity Profile: Oxidizing agents, such as ZINC CHROMATE, can react with reducing agents to generate heat and products that may be gaseous (causing pressurization of closed containers). The products may themselves be capable of further reactions (such as combustion in the air). The chemical reduction of materials in this group can be rapid or even explosive, but often requires initiation (heat, spark, catalyst, addition of a solvent). Explosive mixtures of inorganic oxidizing agents with reducing agents often persist unchanged for long periods if initiation is prevented. Such systems are typically mixtures of solids, but may involve any combination of physical states. Some inorganic oxidizing agents are salts of metals that are soluble in water; dissolution dilutes but does not nullify the oxidizing power of such materials. Organic compounds, in general, have some reducing power and can in principle react with compounds in this class. Actual reactivity varies greatly with the identity of the organic compound. Inorganic oxidizing agents can react violently with active metals, cyanides, esters, and thiocyanates.; View all

6.8 Health Hazard: Inhalation of dust causes irritation of nose and throat. Ingestion can cause irritation or corrosion of the alimentary tract, circulatory collapse, and toxic nephritis. Contact with eyes or skin causes irritation.

6.9 Safety Profile: Confirmed human carcinogen producing lung tumors. A poison via intravenous route. Human mutation data reported. See also CHROMIUM COMPOUNDS and ZINC COMPOUNDS.

6.10 Potential Exposure: Zinc chromate is used as an anticorrosion pigment in primers and as a coloring agent; as a pigment in surface coatings and linoleum; to impart corrosion resistance to epoxy laminates.

6.11 First aid: If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit.

6.12 Shipping: UN3288 Toxic solids, inorganic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required. UN3077 Environmentally hazardous substances, solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required.

6.13 Incompatibilities: An oxidizer; reacts with reducing agents; combustibles, organic materials.

6.14 Usage: Zinc chromate is used in pigments, rubber, linoleum manufacturing, metal surface treatment, electroplating intermediates, research and development. It finds its application as an useful metal for preventing corrosion when applied to other metals.

7. Computational chemical data

Molecular Weight: 181.37400g/mol
Molecular Formula: CrO₄Zn
Compound Is Canonicalized: True
XLogP3-AA: null
Exact Mass: 179.849305
Monoisotopic Mass: 179.849305
Complexity: 62.2
Rotatable Bond Count: 0
Hydrogen Bond Donor Count: 0
Hydrogen Bond Acceptor Count: 4
Topological Polar Surface Area: 80.3
Heavy Atom Count: 6
Defined Atom Stereocenter Count: 0
Undefined Atom Stereocenter Count: 0
Defined Bond Stereocenter Count: 0
Undefined Bond Stereocenter Count: 0
Isotope Atom Count: 0
Covalently-Bonded Unit Count: 2
CACTVS Substructure Key Fingerprint: AAADcQAAOAAAAACCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==

8. Question & Answer

What is zinc chromate primer used for? Jan 02 2022
Prevention of rust on ferrous metals. Zinc acts as a sacrificial anode when in direct contact with iron and steel. The zinc is consumed before the protected metal can oxidize.
What property of zinc chromate makes it a good anticorrosion paint Jun 17 2021
What properties of zinc chromate make it a good anticorrosion paint? I know that stainless steel is protected by a layer of chromium oxide. Is it because the zinc chromate doesn't flake off the metal..

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