Technical Data Sheet

Boric Acid Powder 99% ACS Grade

ACS Grade · 99%

Alliance Code: boric-acid-powder-99-acs-grade
Reviewed: 2026-06-18
Revision: 1.2

CAS number: 10043-35-3
Structure: Structure · PubChem
Grade: ACS Grade · 99%
Signal word: Danger
Hazards: Health hazardH360FD

Last reviewed 2026-06-18 by Andre Taki, Chief Commercial Officer.

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: —PubChem
Molecular Weight: —PubChem
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

One or more physical-property values are temporarily suppressed pending verification against vendor COA data. For complete properties refer to the Safety Data Sheet (SDS) or contact sales@alliancechemical.com.

Property	Value	Source
Appearance	Fine white crystalline powder, soft texture	Adjudicated
Form	Solid	Published reference
Odor	Odorless	Published reference
Density	1.435 at 68 °F (USCG, 1999) - Denser than water; will sink	Published reference
Boiling Point	572 °F at 760 mmHg (decomposes) (NTP, 1992)	Adjudicated
Melting Point	340 °F (NTP, 1992)	Adjudicated
Flash Point	No data	Published reference
Vapor Pressure	1.6X10-6 mm Hg at 25 °C (2.136X10-4 Pa); log P (in Pa) = 26.83 - 9094/T where T is deg K	Published reference
Solubility (water)	10 to 50 mg/mL at 66 °F (NTP, 1992)	Published reference

Regulatory & Transport

DOT / 49 CFR

UN Number: Not regulatedAdjudicated
Hazard Class: Not regulatedAdjudicated
Packing Group: Not regulatedAdjudicated
Proper Shipping Name: Not regulatedAdjudicated

GHS / OSHA HazCom 2012

Signal Word: DangerAdjudicated
H-Codes (Hazard Statements): H360FDECHA CLP Annex VI
P-Codes (Precautionary Statements): P201, P202, P280, P308+P313, P405, P501ECHA CLP Annex VI

Occupational Exposure Limits

OSHA PEL (29 CFR 1910.1000): —no canonical
ACGIH TLV: —no canonical
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: ECHA CLP Annex VI for harmonised classifications, NIOSH Pocket Guide for REL/IDLH, OSHA Z-Tables for PEL. Always verify against the latest regulatory text before shipment-critical decisions.

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.

Download audit packet

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: Storage: RT (RT (room temperature))itwreagents.com
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: Consult the SDS for material-specific incompatibilities.Class-level guidance — not product-specific; the SDS controls.
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.

NMFC Class

Revision History

Last reviewed 2026-06-18 by Andre Taki, DOT Hazmat Specialist.

Version	Date	Change	Trigger
1.2	2026-09-30	Canonical data updated: 3 fields changed via the provenance/adjudication pipeline. boilingPoint· canonical change (coa.data_provenance / adjudication) meltingPoint· canonical change (coa.data_provenance / adjudication) appearance· canonical change (coa.data_provenance / adjudication)	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). countryOfOrigin· canonical adjudication / reground (coa.data_provenance) dotSubsidiaryHazardClass· canonical adjudication / reground (coa.data_provenance) ghsClassification· canonical adjudication / reground (coa.data_provenance) hsCode· canonical adjudication / reground (coa.data_provenance)	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.