CAS 85-44-9

Phthalic anhydride

邻苯二甲酸酐

C8H4O3MW 148.11 g/molHS 291735

From the buying desk

Sold as flakes at 99.5%. It is only listed as dangerous goods when it contains more than 0.05% maleic anhydride, so the SDS Section 14 decides whether the booking is DG. It is a respiratory and skin sensitizer.

Import Card

Before you order phthalic anhydride from China, see its register listing, the duty, anti dumping cases and a supplier check on one card, each with its source and date.

Card for the US Card for Australia

Identifiers

Synonyms
PA, 1,3-Isobenzofurandione
Formula
C8H4O3
Molecular weight
148.11 g/mol
SMILES
C1=CC=C2C(=C1)C(=O)OC2=O
InChIKey
LGRFSURHDFAFJT-UHFFFAOYSA-N
HS code (6-digit)
291735

Transport and hazard profile

GHS hazard statements, Danger. H-codes, H302, H315, H317, H318, H334, H335. Refer to the substance SDS Section 2 for the full classification.

US and Australian rules for Phthalic anhydride

Read from the official lists by CAS 85-44-9. Screening only: check the source before you ship, store or report.

California Prop 65

No entry

No entry for CAS 85-44-9 in the OEHHA list dated July 31, 2026.

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OSHA exposure limit

Listed

Table Z-1: 2 ppm, 12 mg/m³ as an 8 hour average.

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Australian exposure standard

Listed

1 ppm, 6.1 mg/m³ as an 8 hour average.

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CERCLA reportable quantity

Listed

Reportable quantity 5,000 lb (2,270 kg). A package holding this much needs RQ on the shipping paper.

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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

  • · Plasticizers
  • · Alkyd resins
  • · Unsaturated polyester resins
  • · Dyes and pigments

Sourcing documentation chain

Every shipment of Phthalic anhydride 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. 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.