CAS 7783-06-4 · IECSC · People's Republic of China

Hydrogen sulfide (H2S) under IECSC

H2S · 硫化氢

Status: Listed. Hydrogen sulfide is on the IECSC public portion. **On China's Catalog of Hazardous Chemicals AND on Highly Toxic Chemicals Catalog at industrial-grade purity** (verify both entries against the most recent MEE Catalog of Hazardous Chemicals and Highly Toxic Chemicals Catalog before relying); GB 6944 Class 2.3 + 2.1 transport status applies. **Public Security Bureau supervision + traceability + training + inventory-control all required** at every node in producer / distributor chain (consistent with phenol batch 13 + acrylonitrile + VCM Highly Toxic dual-listing pattern). NOT on Easily-Made Drugs Catalog. **China VAT export rebate** for hydrogen sulfide (HS 281110) per current inorganic chemicals chapter rebate schedule (verify the rate against the most recent MOF / GACC rebate notice before invoicing); merchant Chinese-origin H2S exports are rare (captive Claus-process intermediate). Major Chinese H2S captive sources at Sinopec + CNPC + CNOOC sour-gas / refinery operations; verify each producer-site pair against the producer's public website before relying.

Hydrogen sulfide is **on Catalog of Hazardous Chemicals AND Highly Toxic Chemicals Catalog** (Hazardous Chemicals Operation Permit + Public Security Bureau supervision required at every producer + distributor + transport + handling node). NOT on Easily-Made Drugs. **China VAT export rebate** rate per current schedule (verify before invoicing); merchant Chinese-origin H2S exports rare. Major Chinese sources: Sinopec + CNPC + CNOOC sour-gas / refinery captive.

Listing and threshold

Substance Hydrogen sulfide (H2S) (CAS 7783-06-4), H2S
Regime China Inventory of Existing Chemical Substances (IECSC), administered by the Ministry of Ecology and Environment (MEE)
Jurisdiction People's Republic of China
Status Listed
Tonnage threshold No new-substance threshold. Hazardous Chemicals Operation Permit + Highly Toxic Chemicals Public Security Bureau supervision required

Classifications under this regime

  • On Catalog of Hazardous Chemicals at industrial-grade purity
  • **On Highly Toxic Chemicals Catalog** (verify against the most recent MEE Catalog before relying)
  • GB 6944-2012 transport: Class 2.3 (toxic gas) + subsidiary 2.1 (flammable gas)
  • NOT on Easily-Made Drugs Catalog
  • GB/T 17519-2013 Chinese SDS standard
  • GACC HS code: 281110
  • China occupational exposure limit per GBZ 2.1-2019 (verify the current GBZ-listed limit for H2S against the GBZ 2.1 schedule before relying)
  • IARC: Not classified

Restrictions and conditions of use

  • **Hazardous Chemicals Operation Permit + Highly Toxic Chemicals Public Security Bureau supervision** required at every producer + distributor + transport + handling node (verify against the most recent MEE Catalog before relying)
  • **China VAT export rebate** rate per current inorganic chemicals chapter schedule (verify against the most recent MOF / GACC rebate notice before invoicing); merchant Chinese-origin H2S exports rare
  • GB/T 17519 Chinese SDS required (Acute Tox. 2 inhalation + Flam. Gas 1A + Aquatic Acute 1 hazard profile)
  • GB 6944 Class 2.3 + 2.1 transport classification applies

Importer obligations

For Chinese-origin hydrogen sulfide, no IECSC obligation falls on the foreign importer; however, **merchant Chinese-origin H2S exports are rare** (captive Claus-process intermediate at sour-gas / refinery operations). Major Chinese captive sources: Sinopec + CNPC + CNOOC sour-gas / refinery.

Required documents

  • GACC export declaration HS 281110
  • GHS Chinese SDS per GB/T 17519
  • Hazardous Chemicals Operation Permit + Highly Toxic Chemicals Public Security Bureau supervision documentation
  • GB 6944-2012 Class 2.3 + 2.1 transport documentation

Common compliance traps

The pitfalls that have bitten importers on this lane in the past. None of these is theoretical.

  • **On Catalog of Hazardous Chemicals AND Highly Toxic Chemicals Catalog (Public Security Bureau supervision)**
  • **Hazardous Chemicals Operation Permit + Highly Toxic Chemicals Public Security Bureau supervision required at every node**
  • **China VAT export rebate** rate (verify against the most recent MOF / GACC rebate notice before invoicing)
  • NOT on Easily-Made Drugs
  • Major Chinese sources (sour-gas / refinery captive): Sinopec + CNPC + CNOOC (verify each producer-site pair)
  • **Merchant Chinese-origin H2S exports rare** (captive Claus-process intermediate)
  • **Sulfur chain feedstock: H2S → S Claus-process → SO2 → SO3 → H2SO4 contact-process** (closes alongside elemental S batch 80 + H2SO4 batch 2)

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for hydrogen sulfide (h2s), see the CAS 7783-06-4 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the hydrogen sulfide (h2s) cornerstone hub covers the full sourcing chain.

For the structure and history of IECSC, see the IECSC glossary entry.

Need cross-jurisdiction compliance support on this substance? Run it through the REACH / TSCA / IECSC / AICIS / K-REACH checker, or send us the substance and the destination and we will quote FOB China and CIF / DDP landed including the regulatory work on the destination side.

Read next

Cross-jurisdiction profile and sourcing references

Referenced in

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