CAS 7783-06-4

Hydrogen sulfide

硫化氢

H2SMW 34.081 g/molHS 281119 UN1053 · Class 2.3

From the buying desk

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.

Import Card

Before you order hydrogen sulfide 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
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.

US and Australian rules for Hydrogen sulfide

Read from the official lists by CAS 7783-06-4. Screening only: check the source before you ship, store or report.

California Prop 65

No entry

No entry for CAS 7783-06-4 in the OEHHA list dated July 31, 2026.

Open the tool · Official source

OSHA exposure limit

Listed

Table Z-1: Set in Table Z-2 of 29 CFR 1910.1000.

Open the tool · Official source

Australian exposure standard

Listed

10 ppm, 14 mg/m³ as an 8 hour average, 15 ppm, 21 mg/m³ short term.

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CERCLA reportable quantity

Listed

Reportable quantity 100 lb (45.4 kg). A package holding this much needs RQ on the shipping paper.

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EPCRA Tier II threshold

Listed

An Extremely Hazardous Substance, so Tier II reporting starts at 500 lb on site.

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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.

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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.