CAS reference

Styrene

苯乙烯

Class 3 flammable. US TSCA Section 6 risk evaluation in progress. Ships in HDPE drums (rare for export), IBCs, or stainless ISO tanks. Polymerisation inhibitor (TBC, 4-tert-butylcatechol) added at 10 to 50 ppm; receiver should confirm inhibitor level on the COA.

CAS 100-42-5 ·C8H8 ·MW 104.15 g/mol ·HS 290250

Identifiers

Synonyms
Vinylbenzene, Phenylethene, Ethenylbenzene, Styrol
Formula
C8H8
Molecular weight
104.15 g/mol
SMILES
C=Cc1ccccc1
InChIKey
PPBRXRYQALVLMV-UHFFFAOYSA-N
HS code (6-digit)
290250

Transport and hazard profile

Transport classification, UN number UN2055, IMDG Class 3, Packing Group III.

GHS hazard statements, Warning. H-codes, H226, H315, H319, H332, H361d, H372. 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
Restricted

TSCA Section 6 risk evaluation in progress

China IECSC
Listed
Korea K-REACH
Listed
Australia AICIS
Listed

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

Common applications

  • · Polystyrene (PS, EPS, GPPS, HIPS)
  • · ABS resin
  • · Styrene-butadiene rubber (SBR)
  • · Unsaturated polyester resin

Typical Chinese supplier geography

Major Chinese capacity sits in Liaoning, Zhejiang, 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 Styrene 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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