Phthalic anhydride
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Phthalic anhydride
structure -
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CAS No:
85-44-9
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Formula:
C8H4O3
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Chemical Name:
Phthalic anhydride
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Synonyms:
1,3-Isobenzofurandione;Phthalic anhydride;ESEN;Phthalandione;1,3-Phthalandione;Phthalic acid anhydride;Retarder AK;Retarder ESEN;Retarder PD;1,2-Benzenedicarboxylic anhydride;Vulkalent B/C;TGL 6525;Araldite HT 901;HT 901;Phthalanhydride;Sconoc 7;Retarder B-C;NSC 10431;Sconoc 5;2-Benzofuran-1,3-dione;Rikacid PA;OP 392;ADP 1200;1,3-Dihydro-2-benzofuran-1,3-dione;39363-63-8
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CAS No:
Description
Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. Phthalic anhydride is a principal commercial form of phthalic acid. It was the first anhydride of a dicarboxylic acid to be used commercially. This colourless solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. In 2000, the worldwide production volume was estimated to be about 3 million tonnes per year.
Characteristics
43.37
0.9972
white crystalline solid with choking odour
1.53
129-132ºC
284ºC
152ºC
1.646
6 g/L (20 ºC)
Store at RT.
<0.01 mm Hg ( 20 °C)
5.1 (vs air)
Safety Information
III
8
1
R22; R37/38; R41; R42/43
TI3150000
Xn
Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, moisture, strong acids. Dust may form an explosive mixture with air.
S22-S24/25-S26-S37/39-S46
UN 2214
Computed Properties
Molecular Weight:148.11
XLogP3:1.3
Hydrogen Bond Acceptor Count:3
Exact Mass:148.016043985
Monoisotopic Mass:148.016043985
Topological Polar Surface Area:43.4
Heavy Atom Count:11
Complexity:187
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
Price Analysis
- Data: 2026-07-31
- Price: 9283.33Yuan/mt
- Change: 0
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