phthalic anhydride

Content description：phthalic anhydrideCAS 85-44-9HS code 29173980We have type c 600kg bag,25kg bag ,500kg bag, we can also packing as your requirement.Phthalic anhydrideis the organic compound with the formula C6H4(CO)2O···

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Product Introduction

phthalic anhydride

CAS 85-44-9

HS code 29173980

We have type c 600kg bag,25kg bag ,500kg bag, we can also packing as your requirement.

Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. This colourless solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. Phthalic anhydride is an important chemical intermediate in the plastics industry from which are derived numerous phthalate esters that function as plasticizers in synthetic resins. Phthalic anhydride itself is used as a monomer for synthetic resins such as glyptal, the alkyd resins, and the polyester resins. Phthalic anhydride is also used as a precursor of anthraquinone, phthalein, rhodamine, phthalocyanine, fluorescein, and xanthene dyes. Phthalic anhydride is used in the synthesis of primary amines, the agricultural fungicide phaltan, and thalidomide. Other reactions with phthalic anhydride yield phenolphthalein, benzoic acid, phthalylsulfathiazole (an intestinal antimicrobial agent), and orthophthalic acid.

ITEM	INDEX
ITEM	Top grade	Result
Appearance	white scaly or crystalline powder
Molten Chroma(Chroma no. )≤	20	15
thermostable Chroma(Chroma no. )≤	50	11
Chroma of vitriol(Chroma no. )≤	60	10
crystallization point°C≥	130.5	130.3
Purity(mass fraction)%≥	99.8	99.9
Free acid(mass fraction)≤ %	0.2	0.01

Phthalic anhydride is used in the manufacture of unsaturated polyesters and as a curing agent for epoxy resins. When used as a pigment, it can be responsible for sensitization in ceramic workers.