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Home> Hot Product Listed B   > Boric acid

Boric acid

CAS No.:11113-50-1
Molecular Weight:61.83
Molecular Formula:H3BO3 (Products with the same molecular formula)
MOL File:11113-50-1.mol
Names and Identifiers

Boric acidBorsrenatliche

Canonical Smiles
1.437 g/cm3
Melting Point
170.9 deg C
Solubility: in glycerol 17.5% at 25 deg C; ethylene glycol 18.5% at 25 deg C; in methanol 173.9 g/L at 25 deg C; in ethanol 94.4 g/L at 25 deg C; in acetone 0.6% at 25 deg C; ethyl acetate 1.5% at 25 deg C
Water solubility: 2.52% at 0 deg C; 3.49% at 10 deg C; 4.72% at 20 deg C; 6.23% at 30 deg C; 8.08% at 40 deg C; 10.27% at 50 deg C; 12.97% at 60 deg C; 15.75% at 70 deg C; 19.10% at 80 deg C; 23.27% at 90 deg C; 27.53% at 100 deg C<
Colorless, transparent crystals or white granules or powder
Colorless triclinic crystals
White waxy triclinic solid plates
Spectral properties
INDEX OF REFRACTION: 1.337, 1.461, 1.462
Safety and Handling
Skin, Eye, and Respiratory Irritations
Irritant to skin in dry form.
Boric acid ... produced mild eye irritation in the Draize test in rabbits.
... May produce irritation of the nasal mucous membranes, the respiratory tract, and eyes. /Boron compounds/
Products containing 0.4% and 2.4% boric acid were moderately irritating and practically nonirritating /to the skin/, respectively.
Fire Potential
Not flammable
Technical, 99.9%; CP; USP
Three grades of granular and powdered boric acid are manufactured in the United States. ... technical grade, NF grade ... /and/ special quality grade
Saturated solutions at 0 deg C contain 2.6% acid; at 100 deg C, 28% boric acid is soluble
Single Active Ingredient Products: Wettable powder 99.0%; Dust 99.0%, 64.0%, and 65.0%; Liquid Concentrate 26.3%; Ready-to-Use Paste 50.0%; Pelleted/Tableted 40.0%; Bait Tube 53.3%.
Exposure Standards and Regulations
Drug products containing certain active ingredients offered over-the-counter (OTC) for certain uses. A number of active ingredients have been present in OTC drug products for various uses, as described below. However, based on evidence currently available, there are inadequate data to establish general recognition of the safety and effectiveness of these ingredients for the specified uses: boric acid is included in topical acne drug products; dandruff/seborrheic dermatitis/psoriasis drug products; skin bleaching drug products; astringent drug products; fever blister and cold sore treatment drug products; insect bite and sting drug products; poison ivy, poison oak, poison sumac drug products; ophthalmic anti-infective drug products; diaper rash drug products; and antiseptic drug products.
Reactivities and Incompatibilities
During an attempt to make triacetyl borate, a mixture of boric acid and acetic anhydride exploded when heated to 58-60 deg C.
A mixture of potassium and /boric acid/ ... may explode on impact ...
Incompatible /with/ alkali carbonates and hydroxides.
Other Preventative Measures
Containers of boric acid should bear an autoclavable poison label.
Avoid depositing product onto exposed food and feed processing, preparation and serving surfaces, or introducing material into air. Do not apply when food processing facility is in operation. Any product visible after application must be brushed into cracks and crevices, or removed. Place product in areas that are inaccessible to children and pets.
Protective Equipment and Clothing
Irritant to skin in dry form.
Boric acid ... produced mild eye irritation in the Draize test in rabbits.
... May produce irritation of the nasal mucous membranes, the respiratory tract, and eyes. /Boron compounds/
Products containing 0.4% and 2.4% boric acid were moderately irritating and practically nonirritating /to the skin/, respectively.
Octanol/Water Partition Coefficient
log Kow = 0.175
Disposal Methods
SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational exposure or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal, aquatic, and plant life; and conformance with environmental and public health regulations.
Reach Info
Globally, no enterprise has officially registered the substance REACH.
Other official information: ·ECHA Information Page for CAS: 11113-50-1 EC: 234-343-4 Boric acid ·ECHA C&L Inventory for CAS: CAS: 11113-50-1 EC: 234-343-4 Boric acid

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

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017


1.1 GHS Product identifier

Product name Boric acid

1.2 Other means of identification

Product number -
Other names -

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Enzymes and Enzyme Stabilizers
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

Reproductive toxicity, Category 1B

2.2 GHS label elements, including precautionary statements

Signal word


Hazard statement(s)


Precautionary statement(s)

P201 Obtain special instructions before use.

P202 Do not handle until all safety precautions have been read and understood.

P280 Wear protective gloves/protective clothing/eye protection/face protection.


P308+P313 IF exposed or concerned: Get medical advice/ attention.


P405 Store locked up.


P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification


3.Composition/information on ingredients

3.1 Substances

Chemical name Common names and synonyms CAS number EC number Concentration
Boric acid Boric acid 11113-50-1 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 and then wash skin with water and soap.

In case of eye contact

Rinse with plenty of water (remove contact lenses if easily possible).

If swallowed

Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention.

4.2 Most important symptoms/effects, acute and delayed

Although no adverse effects have been reported from inhaling boric acid dust, it is absorbed through mucous membranes. Ingestion of 5 grams or more may irritate gastrointestinal tract and affect central nervous system. Contact with dust or aqueous solutions may irritate eyes; no chronic effects have been recognized, but continued contact should be avoided. Dust and solutions are absorbed through burns and open wounds but not through unbroken skin. (USCG, 1999)

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

The diagnoses of boric acid poisoning can be confirmed with the measurement of blood or serum boric acid levels (nL=1.4 nmol/mL), but this test is not routinely available. Treatment of boric acid toxicity is mainly supportive. Activated charcoal is not recommended because of its relatively poor adsorptive capacity for boric acid. In cases of massive oral overdose or renal failure, hemodialysis, or perhaps exchange transfusion in infants, may be helpful in shortening the half-life of boric acid.

5.Fire-fighting measures

5.1 Extinguishing media

Suitable extinguishing media

Fire Extinguishing Agents: Water fog. (USCG, 1999)

5.2 Specific hazards arising from the chemical

Literature sources indicate that this compound is nonflammable.

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. Wash away remainder with plenty of water.

6.3 Methods and materials for containment and cleaning up

Pick up and arrange disposal. 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

Separated from strong bases.Preserve in well-closed containers.

8.Exposure controls/personal protection

8.1 Control parameters

Occupational Exposure limit values

no data available

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 Boric acid is an odorless white solid. Melting point 171\u00b0C. Sinks and mixes with water. (USCG, 1999)
Colour Colorless, transparent crystals or white granules or powder
Odour Odorless
Melting point/ freezing point 170.9\u00baC
Boiling point or initial boiling point and boiling range 300\u00b0C at 760 mm Hg (decomposes)
Flammability Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.
Lower and upper explosion limit / flammability limit no data available
Flash point no data available
Auto-ignition temperature no data available
Decomposition temperature 171\u00b0C
pH 3,8-4,8 (3,3\u00a0% aqueous solution)
Kinematic viscosity no data available
Solubility 10 to 50 mg/mL at 18.89\u00b0C
Partition coefficient n-octanol/water (log value) log Kow = 0.175
Vapour pressure 1.6X10-6 mm Hg at 25\u00b0C (2.136X10-4 Pa); log P (in Pa) = 26.83 - 9094/T where T is deg K
Density and/or relative density 1.437 g/cm3
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 in air.

10.3 Possibility of hazardous reactions

Not flammableBORIC ACID is a very weak acid. Incompatible with alkali carbonates and hydroxides. During an attempt to make triacetyl borate, a mixture of boric acid and acetic anhydride exploded when heated to 58-60\u00b0C [Chem. Eng. News 51:(34) 1973]. Reacts violently with the strong reducing agent potassium metal.

10.4 Conditions to avoid

no data available

10.5 Incompatible materials

During an attempt to make triacetyl borate, a mixture of boric acid and acetic anhydride exploded when heated to 58-60\u00b0C.

10.6 Hazardous decomposition products

Boric acid decomposes in heat above 100\u00b0C forming boric anhydride and water.

11.Toxicological information

Acute toxicity

  • Oral: LD50 Rat oral 3000-4000 mg/kg bw
  • Inhalation: LC50 Rat inhalation >0.16 mg/L 4hr
  • 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


Cancer Classification: Group E Evidence of Non-carcinogenicity for Humans

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: LC50; Species: Oncorhynchus mykiss (Rainbow trout); Concentration: 100 ppm for 96 hr (soft water); exposure was initiated subsequent to fertilization and maintained through 4 days posthatching /Conditions of bioassay not specified in source examined
  • Toxicity to daphnia and other aquatic invertebrates: LC50; Species: Daphnia magna (Water flea); Conditions: static bioassay; Concentration: 133 (115-153) mg/L for 48 hr
  • Toxicity to algae: no data available
  • Toxicity to microorganisms: no data available

12.2 Persistence and degradability

No biotransformation processes have been reported for boron compounds(1). Boric acid has been shown to be a mild antiseptic agent with bacteriostatic action(2). A concentration beyond 10 mg/L produces toxicity to activated sludge cultures(3).

12.3 Bioaccumulative potential

Highly water soluble materials are unlikely to bioaccumulate to any significant degree, and borate species are all present essentially as undissociated boric acid at neutral pH(1). The octanol/water partition coefficient for boric acid has been measured as 0.175(1), indicating low bioaccumulation potential(1). Boron did not bioaccumulate in 47-day and 21-day exposure tests using oysters and sockeye salmon respectively(1).

12.4 Mobility in soil

Boric acid adsorption to illite (three-layered clay consisting of two outer layers of hydrated SiO2 and a central layer of hydrated Al2O3) and kaolinite (alternate layers of SiO2 and Al2O3) clays, as well as activated sludge was studied. The compound was added to 100 mL flasks corresponding to a boron concentration range of zero to 256 mg/L. It was observed that kaollinite adsorbed about 40 times (Kd = 0.199 (Freundlich adsorption coefficient)) more boric acid than illinite (Kd = 0.005) at pH 7; five times as much boric acid adsorbed to activated sludge (Kd = 0.025) as to illinite at pH 7(1). Boron adsorption is influenced by the distribution of boron species (H3BO3; B(OH)4(-)) as well as pH, the type and/or composition of the solution matrix, and surface properties(2). The pKa of boric acid is 9.24(3), indicating that this compound will exist primarily in the undissociated form in the environment, but partially in the anion form in alkaline soils(SRC). However, boric acid is a Lewis acid and therefore behaves as an electron acceptor, rather than a proton donor(3).

12.5 Other adverse effects

no data available

13.Disposal considerations

13.1 Disposal methods


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: no data available IMDG: no data available IATA: no data available

14.2 UN Proper Shipping Name

ADR/RID: no data available
IMDG: no data available
IATA: no data available

14.3 Transport hazard class(es)

ADR/RID: no data available IMDG: no data available IATA: no data available

14.4 Packing group, if applicable

ADR/RID: no data available IMDG: no data available IATA: no data available

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
Boric acid Boric acid 11113-50-1 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 18, 2017
Revision Date Aug 18, 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%


  • IPCS - The International Chemical Safety Cards (ICSC), website:
  • HSDB - Hazardous Substances Data Bank, website:
  • IARC - International Agency for Research on Cancer, website:
  • eChemPortal - The Global Portal to Information on Chemical Substances by OECD, website:
  • CAMEO Chemicals, website:
  • ChemIDplus, website:
  • ERG - Emergency Response Guidebook by U.S. Department of Transportation, website:
  • Germany GESTIS-database on hazard substance, website:
  • ECHA - European Chemicals Agency, website:

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.

Precursor and Product
Computational chemical data

Molecular Weight:61.83302 [g/mol]
Molecular Formula:BH3O3
H-Bond Donor:3
H-Bond Acceptor:3
Rotatable Bond Count:0
Exact Mass:62.017524
MonoIsotopic Mass:62.017524
Topological Polar Surface Area:60.7
Heavy Atom Count:4
Formal Charge:0
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