CAS 64-18-6

Formic acid

甲酸

HCOOHMW 46.025 g/molHS 291511 UN1779 · Class 8 · PG II

From the buying desk

Chinese factories sell 85%, 90%, 94% and 99% grades. Above 85% it ships as UN1779 with a flammable subsidiary risk; the 85% grade ships as UN3412, so the booking has to match the grade on the invoice. Packed in 25 kg or 35 kg drums, IBCs or ISO tanks.

Import Card

Before you order formic 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.

Card for the US Card for Australia

Identifiers

Synonyms
Methanoic acid, Formylic acid
Formula
HCOOH
Molecular weight
46.025 g/mol
SMILES
C(=O)O
InChIKey
BDAGIHXWWSANSR-UHFFFAOYSA-N
HS code (6-digit)
291511

Transport and hazard profile

Transport classification, UN number UN1779, IMDG Class 8, Packing Group II.

GHS hazard statements, Danger. H-codes, H226, H290, H302, H314, H318, H331. Refer to the substance SDS Section 2 for the full classification.

US and Australian rules for Formic acid

Read from the official lists by CAS 64-18-6. Screening only: check the source before you ship, store or report.

California Prop 65

No entry

No entry for CAS 64-18-6 in the OEHHA list dated July 31, 2026.

Open the tool · Official source

OSHA exposure limit

Listed

Table Z-1: 5 ppm, 9 mg/m³ as an 8 hour average.

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Australian exposure standard

Listed

5 ppm, 9.4 mg/m³ as an 8 hour average, 10 ppm, 19 mg/m³ short term.

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CERCLA reportable quantity

Listed

Reportable quantity 5,000 lb (2,270 kg). A package holding this much needs RQ on the shipping paper.

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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

  • · Leather tanning
  • · Silage preservative
  • · Textile dyeing
  • · Rubber latex coagulant

Sourcing documentation chain

Every shipment of Formic 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 plus an MSA China DG packing certificate. For Incoterms reference see FOB, CIF, and CFR.

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