Boric Acid Technical Grade

Product Identifier

Boric Acid Technical Grade

Grade

Technical

CAS Number

10043-35-3

Chemical Formula

H3BO3

Molecular Weight

61.83 g/mol

Manufacturer

Alliance Chemical
204 South Edmond Street, Taylor, TX 76574

Emergency Phone

Chemtel 1-800-255-3924 (24/7)

Synonyms

Orthoboric acid; boracic acid; hydrogen borate

Recommended Use

Glass, fiberglass and ceramic glazes; flame retardants; metallurgy and welding fluxes; electroplating; pH buffering.

Restrictions on Use

May damage fertility or the unborn child: minimize exposure, especially for workers who are or may become pregnant. Not registered under FIFRA — not for use as an insecticide or other pesticide. Not for food, cosmetic or medical use.

Classification

• Reproductive toxicity, Category 1

Signal Word

Danger

Hazard Statements

• H360FDMay damage fertility. May damage the unborn child.

Precautionary Statements

• P201Obtain special instructions before use.
• P202Do not handle until all safety precautions have been read and understood.
• P280Wear protective gloves, protective clothing, and eye/face protection.
• P308+P313IF exposed or concerned: Get medical advice or attention.
• P405Store locked up.
• P501Dispose of contents and container in accordance with local, regional, national, and international regulations.

Classification, hazard (H) and precautionary (P) statements and pictograms per OSHA HCS 2024 (29 CFR 1910.1200, Appendices A–C), aligned with GHS Rev. 7.

Concentrations are nominal; lot-specific values appear on the Certificate of Analysis. Components not contributing to classification are omitted.

Eyes

Rinse with plenty of water for at least 15 minutes. Remove contact lenses if present and easy to do. Continue rinsing. Seek medical attention immediately.

Skin

Immediately flush with plenty of water for at least 15 minutes while removing contaminated clothing. Wash with soap. Get medical attention immediately.

Inhalation

Move person to fresh air and keep comfortable for breathing. If breathing is difficult, give oxygen. If not breathing, give artificial respiration. Get medical attention immediately.

Ingestion

Do Not Induce Vomiting! Never give anything by mouth to an unconscious person. If conscious, wash out mouth with water. Get medical attention immediately.

Most Important Symptoms and Effects

• No specific symptoms are expected from the hazards identified in Section 2.

Immediate Medical Attention and Special Treatment

• Treat symptomatically. Get medical attention if symptoms develop or persist.

Suitable Extinguishing Media

Use water spray, alcohol-resistant foam, dry chemical, or CO2. Use measures appropriate to local circumstances.

Unsuitable Extinguishing Media

Do not use a solid water stream as it may scatter and spread fire.

Specific Hazards Arising from the Chemical

Containers may rupture when heated.

Protective Equipment

Wear self-contained breathing apparatus and full protective clothing.

Hazardous Combustion Products

Water vapor and boron oxides on heating. Not combustible.

Personal Precautions

Use PPE as described in Section 8. Ensure adequate ventilation. Evacuate personnel to safe areas.

Environmental Precautions

Prevent leakage or spillage from entering drains, sewers, or waterways.

Containment & Cleanup

Absorb with inert material. Collect in appropriate waste container. Dispose per applicable regulations.

Safe Handling

Use with adequate ventilation. Avoid contact with skin, eyes, and clothing. Wash thoroughly after handling. Keep container closed when not in use.

Safe Storage

Store in a cool, dry, well-ventilated area. Keep away from incompatible materials (see Section 10). Keep containers tightly closed.

Specific Storage Precautions

Keep tightly closed in a dry, ventilated area away from bases and oxidizers. Store locked up and away from food and feed.

Occupational Exposure Limits

Engineering Controls

Use adequate ventilation. Provide eyewash stations and quick-drench showers accessible to areas of use.

Eye/Face Protection

Wear chemical safety goggles or face shield.

Skin Protection

Wear chemical-resistant gloves and protective clothing.

Respiratory Protection

Use NIOSH-approved respirator if exposure limits are exceeded or irritation occurs.

Exposure limits sourced from NIOSH Pocket Guide, OSHA 29 CFR 1910.1000 and ACGIH TLVs.

Appearance

White fine crystalline powder, lightweight texture

Odor

Odorless

Odor Threshold

No data available

pH

4.6–5.4 (1% aqueous solution, 25 °C)

Melting Point / Freezing Point

169–171 °C (336–340 °F), with decomposition

Boiling Point

Not applicable — decomposes before boiling

Flash Point

Not applicable

Evaporation Rate

No data available

Flammability (solid, gas)

No data available

Upper/Lower Flammability or Explosive Limits

No data available

Vapor Pressure

Negligible at 20 °C

Vapor Density

No data available

Relative Density

1.44–1.49 at 20 °C (water = 1)

Solubility

Soluble in water (about 49 g/L at 20 °C, much more in hot water); soluble in methanol and glycerol

Partition Coefficient (n-octanol/water)

No data available

Auto-ignition Temperature

No data available

Decomposition Temperature

Loses water from about 100 °C (forming metaboric acid), then boron oxide at higher temperature

Viscosity

No data available

Particle Characteristics

No data available

Form

Solid

Density

0.85 - 1.00 g/cm3

Values shown reflect product-specific canonical data. Lot-specific ranges may vary; see the Certificate of Analysis for the shipped lot.

Reactivity

Not reactive under normal conditions of use and storage.

Chemical Stability

Stable under recommended storage conditions.

Possibility of Hazardous Reactions

None under normal processing conditions.

Conditions to Avoid

Moisture (causes caking) and heat above 100 °C (loses water).

Incompatible Materials

Strong bases; strong oxidizing agents; potassium and other alkali metals; acetic anhydride.

Hazardous Decomposition Products

Water vapor and boron oxides on heating. Not combustible.

See below for route-specific acute toxicity data.

Likely Routes of Exposure

Inhalation, skin contact, eye contact, ingestion.

Symptoms

• No specific symptoms are expected from the hazards identified in Section 2.

Delayed and Chronic Effects

• Reproductive toxicity: may damage or is suspected of damaging fertility or the unborn child.

Carcinogen Classification

Ecotoxicity

Fish LC50: 79 mg/L (96 h, Oncorhynchus mykiss — 79 ppm hard / 100 ppm soft water; cf. Ictalurus punctatus 22 ppm hard)

Persistence & Degradability

Persistent as boron — Does not biodegrade (inorganic boron)

Bioaccumulative Potential

BCF No bioaccumulation reported for boron compounds

Mobility in Soil

High soil mobility; leaches readily (pH-dependent adsorption, max pH 8.5–9)

Dispose of contents/container in accordance with applicable federal, state, and local regulations. Do not dispose of into drains or waterways.

EPA RCRA Waste Codes

Not a P- or U-listed waste and not expected to be a characteristic hazardous waste; the generator makes the final determination. Check state rules for borates.

Not regulated for transport under US DOT 49 CFR Subchapter C, IMDG, or IATA DGR.

CERCLA Reportable Quantity (RQ)

Not a CERCLA hazardous substance (no RQ). Not an EPCRA Section 313 chemical. EU REACH SVHC (toxic for reproduction).

SARA 311/312 hazard categories correspond to the GHS classification in Section 2. Data retrieved as of: California Proposition 65 2026-10-02; US EPA TSCA Active Inventory 2026-10-02; EPCRA SARA 313 (TRI) 2026-10-02.

Revision Date

2026-10-08

Format

16-section format per OSHA HCS 2024 (29 CFR 1910.1200, Appendix D), aligned with GHS Rev. 7.