CAS reference

Hydrogen sulfide

硫化氢

Class 2.3 toxic gas with 2.1 flammable sub-risk. Most carriers refuse H2S as cargo because of toxicity. Trade is essentially zero; substance is consumed at producing site (refinery sour gas, natural gas processing). For chemical importers, the relevant H2S is the by-product stream they handle, not a traded cargo.

CAS 7783-06-4 ·H2S ·MW 34.081 g/mol ·HS 281119

Identifiers

Synonyms
Sulfane, Stink damp, Sewer gas
Formula
H2S
Molecular weight
34.081 g/mol
SMILES
S
InChIKey
RWSOTUBLDIXVET-UHFFFAOYSA-N
HS code (6-digit)
281119

Transport and hazard profile

Transport classification, UN number UN1053, IMDG Class 2.3. Classified as a marine pollutant.

GHS hazard statements, Danger. H-codes, H220, H330, H400. Refer to the substance SDS Section 2 for the full classification.

Regulatory profile across 5 jurisdictions

Verified against ECHA, US EPA TSCA Inventory, MEE China IECSC, NIER K-REACH, and AICIS AIIC. Last verification 2026-04-30. Confirm with the regulator portal before any shipping decision.

EU REACH
Restricted

Annex XVII restrictions on consumer applications

US TSCA
Listed
China IECSC
Listed
Korea K-REACH
Listed
Australia AICIS
Listed

Look up other substances at the REACH / TSCA cross-jurisdiction checker.

Common applications

  • · Sulfur recovery (refinery sour gas)
  • · Heavy water production
  • · Sulfide mineral concentration

Sourcing documentation chain

Every shipment of Hydrogen sulfide 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.

Sourcing Hydrogen sulfide?

Send us the spec.

Our Shanghai team handles the documentation chain for Hydrogen sulfide exports out of China. Factory selection, COA verification, DG declaration if applicable, and the duty stack quantified before you commit a deposit.

Request a Quote

Read next

Where this substance shows up across Sourzi

Referenced in

5 pages across the Sourzi moat

This term shows up in 5 regulatory pages. Sample backlinks per content type below.

Regulatory (5)

Plus 2 more regulatory pages.

Free download

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