CAS reference

Chlorine

氯气

Class 2.3 toxic gas. Ships almost exclusively as liquefied gas in pressure cylinders or rail tank cars. Sea-freight bookings carrier-restricted; most carriers refuse Cl2. Most chemical importers source as derivatives (sodium hypochlorite, hydrochloric acid) rather than elemental chlorine.

CAS 7782-50-5 ·Cl2 ·MW 70.906 g/mol ·HS 280110

Identifiers

Synonyms
Molecular chlorine, Bertholite
Formula
Cl2
Molecular weight
70.906 g/mol
SMILES
ClCl
InChIKey
KZBUYRJDOAKODT-UHFFFAOYSA-N
HS code (6-digit)
280110

Transport and hazard profile

Transport classification, UN number UN1017, IMDG Class 2.3. Classified as a marine pollutant.

GHS hazard statements, Danger. H-codes, H270, H315, H319, H330, H335, 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
Listed
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

  • · Chlor-alkali (HCl, NaOH co-products)
  • · Water disinfection
  • · PVC manufacture (via VCM)
  • · Pulp bleaching

Typical Chinese supplier geography

Major Chinese capacity sits in Shandong, Jiangsu. Coastal producers (Shandong, Jiangsu, Zhejiang) typically dominate export volume because of port access; inland producers (Inner Mongolia, Xinjiang, Shaanxi) compete on raw-material cost but add inland-rail or trucking cost to reach the coast.

Sourcing documentation chain

Every shipment of Chlorine 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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Where this substance shows up across Sourzi

Referenced in

20 pages across the Sourzi moat

This term shows up in 5 regulatory pages, 1 topic clusters, 14 chemical parks. Sample backlinks per content type below.

Regulatory (5)

Plus 2 more regulatory pages.

Topic cluster (1)

Park (14)

Plus 11 more chemical parks.

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