Industrial chemicals · Taylor, TXTechnical Data Sheet
Boric Acid Powder 99% ACS Grade
ACS Grade · 99%
- CAS number
- 10043-35-3
- Structure
Structure · PubChem - Grade
- ACS Grade · 99%
- Signal word
- Danger
- Hazards
Identity & Composition
- Product Name
- Boric Acid Powder 99% ACS Grade
- Alliance Code
- boric-acid-powder-99-acs-grade
- Grade
- ACS Grade
- Concentration
- 99%
- CAS Number
- 10043-35-3PubChem
- Formula
- H3BO3Adjudicated
- Molecular Weight
- 61.83 g/molAdjudicated
- Product Type
- Solution
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay (H3BO3) | min. 99.8 % | 99.96 % | titr. | Interpreted |
| Insoluble matter in CH3OH | max. 0.005 % | 0.0012 % | — | Interpreted |
| Lead (Pb) | max. 0.0005 % | 0.000025 % | — | Interpreted |
| Potassium (K) | max. 0.005 % | 0.00046 % | — | Interpreted |
| Nonvolatile with methanol | 0.05% | 0.0044 % | — | Interpreted |
| Residue on ignition (as SO4) (CH3OH + HCl) | max. 0.05 % | 0.0061 % | — | Interpreted |
| Insoluble in methanol | 0.005% | 0.005% | — | Interpreted |
| Insoluble matter in H2O | max. 0.005 % | 0.00082 % | — | Interpreted |
| Arsenic (As) | <= 1 ppm | 0.066 ppm | — | Interpreted |
| Calcium (Ca) | 0.005% | 0.00038 % | — | Interpreted |
| Chloride (Cl) | 0.001% | 0.00016 % | — | Interpreted |
| Heavy metals (as Pb) | 0.001% | 0.00009 % | — | Interpreted |
| Iron (Fe) | 0.001% | 0.00012 % | — | Interpreted |
| Phosphate (PO4) | 0.001% | 0.000048 % | — | Interpreted |
| Sulfate (SO4) | 0.01% | 0.0024 % | — | Interpreted |
| Sodium (Na) | max. 0.005 % | 0.0013 % | ICP-OES | Interpreted |
Values are reproduced from the current product reference. Source labels do not by themselves establish a supplier guarantee or a test result for your lot. Confirm applicable acceptance limits and request lot-specific documentation.
Physical & Chemical Properties
| Property | Value | Source |
|---|---|---|
| Appearance | Fine white crystalline powder, soft texture | Adjudicated |
| Form | Solid | Published reference |
| Odor | Odorless | Adjudicated |
| pH | 3.8–4.8 (33 g/L aqueous solution) | Adjudicated |
| Specific Gravity | 1.44–1.49 at 20 °C (water = 1) | Adjudicated |
| Density | 1.435 at 68 °F (USCG, 1999) - Denser than water; will sink | Published reference |
| Boiling Point | Not applicable — decomposes before boiling | Adjudicated |
| Melting Point | 169–171 °C (336–340 °F), with decomposition | Adjudicated |
| Flash Point | Not applicable | Adjudicated |
| Vapor Pressure | Negligible at 20 °C | Adjudicated |
| Solubility (water) | Soluble in water (about 49 g/L at 20 °C, much more in hot water); soluble in methanol and glycerol | Adjudicated |
Regulatory & Transport
DOT / 49 CFR
- UN Number
- Not regulatedAdjudicated
- Hazard Class
- Not regulatedAdjudicated
- Packing Group
- Not regulatedAdjudicated
- Proper Shipping Name
- Not regulatedAdjudicated
GHS / OSHA HCS 2024
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H360FDECHA C&L Inventory
- P-Codes (Precautionary Statements)
- P201, P202, P280, P308+P313, P405, P501ECHA C&L Inventory
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- —no canonical
- ACGIH TLV
- 2 mg/m³ TWA; 6 mg/m³ STEL (inhalable fraction; borate compounds, inorganic)Adjudicated
- NIOSH REL
- 5 mg/m³ TWANIOSH Pocket Guide
- NIOSH IDLH
- —no canonical
Transport descriptions reflect 49 CFR 172.101 lookup at time of publication. Sourced data: NIOSH Pocket Guide for REL/IDLH, OSHA Z-Tables for PEL. Always verify against the latest regulatory text before shipment-critical decisions.
Health & Fire Hazard
Acute Toxicology
- LD₅₀ Oral (rat)
- 2,660 mg/kg (rat)Adjudicated
- LD₅₀ Dermal (rabbit)
- > 2,000 mg/kgAdjudicated
- LC₅₀ Inhalation (rat, 4 h)
- > 2.12 mg/L (dust, 4 h)Adjudicated
Acute toxicology values from SDS Section 11 or NIOSH RTECS.
Supplier Qualification Packet
One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for Boric Acid Powder 99% ACS Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Catalog EquivalentsCross-reference vs major chemical suppliers
Sigma-Aldrich
| SKU | Grade | Conc. | Match | Notes |
|---|---|---|---|---|
| B6768 | ACS reagent | ≥99.5% | Unverified candidate | Same ACS reagent grade. |
Cross-references are informational. Confirm against the manufacturer's current specification before substitution. Competitor trademarks are property of their respective owners.
Applications
- Laboratory analytical reagent supplied "for analysis" to ACS and ISO specificationitwreagents.com
- Laboratory, research or manufacturing use for material meeting ACS specificationsmedia.vwr.com
- Research use only; the supplier excludes human or animal consumption, cosmetic, pharmaceutical and diagnostic usebioshopcanada.com
- Used in the production of agricultural products, flame-retardants, coatings, and metallurgyrosemill.com
Applications are drawn from published manufacturer and supplier documentation; each is sourced. Suitability for a specific use is the buyer's to confirm.
Storage & Handling
- Recommended Storage
- Keep tightly closed in a dry, ventilated area away from bases and oxidizers. Store locked up and away from food and feed.Adjudicated
- Handling Precautions
- Use standard chemical PPE — splash goggles, gloves, lab coat. Refer to SDS for hazard-specific PPE requirements.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Strong bases; strong oxidizing agents; potassium and other alkali metals; acetic anhydride.Adjudicated
- Shelf Life
- Consult Technical Services for product-specific shelf life
For full hazard, PPE, and emergency response guidance, refer to the Safety Data Sheet (SDS) for this product. The SDS controls in all cases where guidance differs.
Packaging & Logistics
Shipping Description (US DOT)
Not regulated for transport.
Confirm against shipping documents and carrier requirements before tender.
Revision History
Last reviewed 2026-06-18 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.3 | 2026-10-08 | Canonical data updated: 22 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-09-30 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-06-18 | Canonical data re-verified: 4 fields updated against independent vendor SDSs, CLP Annex VI, 49 CFR, and OSHA HazCom 2024 (GHS classification, hazard/precautionary codes, signal word, physical properties as applicable).
| canonical_change |
| 1.0 | 2026-05-20 | Initial URL-first TDS published from canonical chemistry registry. | initial |
This Technical Data Sheet is provided for technical reference. The Safety Data Sheet (SDS) controls in all cases where guidance differs. Values reflect Alliance Chemical canonical data at time of generation; subsequent revisions are recorded in the Revision History above.