Phthalic anhydride

Phthalic anhydride, also known as phthalic anhydride, is an important organic chemical raw material. It is a general-purpose anti-focusing agent for natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber and nitrile rubber. It can prevent scorch and improve. Operational safety. It has little effect on the curing time and the aging properties of the product. It is particularly effective for compounds containing thiazole-oxime and thiazole-thiuram accelerator systems and with alkaline accelerators, but not for thiuram sulfur-free vulcanization systems. It is easy to disperse, does not spray, and has little pollution. However, white rubber will also have slight discoloration when it is exposed to light, and it is generally not suitable for white rubber. When phthalic anhydride is used together with sodium carbonate for high-promoting sponge products, it can increase foaming.


More About Phthalic anhydride :

CAS NO: 85-44-9

Molecular formula: C8H4O3

Appearance: White crystal

Purity: ≥98.5%

Melting point: 131-134°C

Density g/ml:1.53



Test ItemStandard
AppearanceWhite crystal
Boiling point284°C
Density g/ml 1.53


Use Of  Phthalic anhydride:

Organic intermediate for the production of plasticizers, coatings and unsaturated polyester resins.




Storage:Stored in a closed, low temperature, heated to decompose into ammonia and acetic acid