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CAS 85-44-9

CAS 85-44-9 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 85-44-9
CAS 85-44-9PubChem CID 6811

Phthalic Anhydride

Phthalic anhydride appears as a colorless to white lustrous solid in the form of needles with a mild distinctive odor. Moderately toxic by inhalation or ingestion and a skin irritant. Melting point 64 °F Flash point 305 °F. Forms a corrosive solution when mixed with water. Used in the manufacture of materials such as artificial resins. — CAMEO Chemicals

IUPAC name
2-benzofuran-1,3-dione
Molecular formula
C8H4O3
Molecular weight
148.11 g/mol
Exact mass
148.016043985 Da
XLogP3
1.3
Topological polar surface area
43.4 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
3
Covalent units
1
Defined stereocentres
0

Also known as

1,3-IsobenzofurandionePhthalandioneRetarder esen1,3-Dioxophthalan1,3-PhthalandionePhthalic acid anhydrideRetarder AKRetarder PD
16 more reported names
o-Phthalic acid anhydridePhthalsaeureanhydridESENVulkalent B/CAnidride ftalicaFtalowy bezwodnikFtaalzuuranhydrideAnhydride phtaliqueFtalanhydrid1,2-Benzenedicarboxylic anhydride1,2-Benzenedicarboxylic acid anhydrideVulkalent BWiltrol PRCRA waste number U190NCI-C03601TGL 6525
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External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 85-44-9

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How CAS 85-44-9 is used on this site

CAS 85-44-9 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 85-44-9 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.