CAS 50-81-7

Ascorbic acid

维生素C

C6H8O6MW 176.12 g/molHS 293627

From the buying desk

China supplies most of the world's vitamin C, in fine powder, granular and coated grades. Specify the pharmacopoeia (USP, EP or FCC), particle size, and whether it is for food, feed or pharma. Not dangerous goods; keep it cool and dry.

Import Card

Before you order ascorbic 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
Vitamin C, L-Ascorbic acid, E300
Formula
C6H8O6
Molecular weight
176.12 g/mol
SMILES
C(C(C1C(=C(C(=O)O1)O)O)O)O
InChIKey
CIWBSHSKHKDKBQ-JLAZNSOCSA-N
HS code (6-digit)
293627

US and Australian rules for Ascorbic acid

Read from the official lists by CAS 50-81-7. Screening only: check the source before you ship, store or report.

California Prop 65

No entry

No entry for CAS 50-81-7 in the OEHHA list dated July 31, 2026.

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OSHA exposure limit

No entry

No entry for CAS 50-81-7 in 29 CFR 1910.1000 Tables Z-1 to Z-3.

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Australian exposure standard

No entry

No entry for CAS 50-81-7 in the Safe Work Australia workplace exposure standards.

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CERCLA reportable quantity

No entry

No entry for CAS 50-81-7 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

  • · Food antioxidant
  • · Dietary supplements
  • · Pharmaceuticals
  • · Animal feed

Sourcing documentation chain

Every shipment of Ascorbic 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.

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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.