CAS 10043-35-3

Boric acid

硼酸

H3BO3MW 61.84 g/molHS 281000

From the buying desk

Boric acid is classified as toxic to reproduction in the EU, which restricts consumer uses there. China also imports large volumes of borate ore, so ask where the boron comes from. Not dangerous goods for sea transport.

Import Card

Before you order boric acid from China, see its register listing, the duty, anti dumping cases and a supplier check on one card, each with its source and date.

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Identifiers

Synonyms
Orthoboric acid, Boracic acid
Formula
H3BO3
Molecular weight
61.84 g/mol
SMILES
B(O)(O)O
InChIKey
KGBXLFKZBHKPEV-UHFFFAOYSA-N
HS code (6-digit)
281000

Transport and hazard profile

GHS hazard statements, Danger. H-codes, H360FD. Refer to the substance SDS Section 2 for the full classification.

US and Australian rules for Boric acid

Read from the official lists by CAS 10043-35-3. Screening only: check the source before you ship, store or report.

California Prop 65

No entry

No entry for CAS 10043-35-3 in the OEHHA list dated July 31, 2026.

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OSHA exposure limit

No entry

No entry for CAS 10043-35-3 in 29 CFR 1910.1000 Tables Z-1 to Z-3.

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Australian exposure standard

No entry

No entry for CAS 10043-35-3 in the Safe Work Australia workplace exposure standards.

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CERCLA reportable quantity

No entry

No entry for CAS 10043-35-3 in 40 CFR 302.4 as read on September 24, 2026.

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EPCRA Tier II threshold

No entry

Not on the Extremely Hazardous Substances list, so the general 10,000 lb Tier II threshold applies where an SDS is required.

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Common applications

  • · Glass fiber and borosilicate glass
  • · Flame retardants
  • · Ceramics and enamels
  • · Agricultural micronutrient

Sourcing documentation chain

Every shipment of Boric acid from China should include a per-batch COA, a current SDS per GB/T 17519 on the China side and the destination jurisdiction's standard on the import side, a packing list, a bill of lading, and a certificate of origin. For Incoterms reference see FOB, CIF, and CFR.

Sourcing Boric acid?

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Free download

Free PDF: the MSDS verification template Sourzi runs against the supplier sheet for every CAS number we book out of China.