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Phthalic anhydride
CAS number:85-44-9
Molecular formula: C8H4O3
Molecular weight:148.11
Customs code:291735000
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Item  

Standard 

Melting Chroma / (Co No)

20 Max. 

Thermally stable chroma / (Co
No) 

50 Max. 

Purity (%) 

99.5 Min. 

Free acid mass fraction/ % 

0.20 Max. 

Crystallizing Point () 

130.5 Min. 

Sulfuric acid color / (Co No) 

40 Max.