CAS 7553-56-2

Iodine

碘

I2MW 253.808 g/molHS 280120 UN3495 · Class 8 · PG III

From the buying desk

High-value specialty cargo (USD 30-60/kg at 2026 prices). Ships in 50 kg fibre drums or 25 kg HDPE drums. Most global supply is from Chile and Japan brine sources; Chinese supply is small and typically re-export rather than primary. Verify origin documentation on every cargo.

Import Card

Before you order iodine 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
Molecular iodine, Diiodine
Formula
I2
Molecular weight
253.808 g/mol
SMILES
II
InChIKey
PNDPGZBMCMUPRI-UHFFFAOYSA-N
HS code (6-digit)
280120

Transport and hazard profile

Transport classification, UN number UN3495, IMDG Class 8, Packing Group III. Classified as a marine pollutant.

GHS hazard statements, Warning. H-codes, H312, H315, H332, H400. Refer to the substance SDS Section 2 for the full classification.

US and Australian rules for Iodine

Read from the official lists by CAS 7553-56-2. Screening only: check the source before you ship, store or report.

California Prop 65

No entry

No entry for CAS 7553-56-2 in the OEHHA list dated July 31, 2026.

Open the tool · Official source

OSHA exposure limit

Listed

Table Z-1: 0.1 ppm, 1 mg/m³ as a ceiling that must never be exceeded.

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Australian exposure standard

Listed

0.1 ppm, 1 mg/m³ as a peak limitation, never to be exceeded.

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CERCLA reportable quantity

No entry

No entry for CAS 7553-56-2 in 40 CFR 302.4 as read on September 24, 2026.

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EPCRA Tier II threshold

No entry

Not on the Extremely Hazardous Substances list, so the general 10,000 lb Tier II threshold applies where an SDS is required.

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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
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

  • · X-ray contrast media
  • · Pharmaceutical synthesis
  • · Animal feed (iodised salt)
  • · Polarising film
  • · Disinfectants

Typical Chinese supplier geography

Major Chinese capacity sits in Hebei (re-export), Shandong (re-export). 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 Iodine 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

14 pages across the Sourzi moat

This term shows up in 5 regulatory pages, 9 chemical parks. Sample backlinks per content type below.

Regulatory (5)

Plus 2 more regulatory pages.

Park (9)

Plus 6 more chemical parks.

Free download

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