Introduction and application of CAS No. 935-79-5 | cis-1,2,3,6-Tetrahydrophthalic anhydride

Synonyms:1,3-isobenzofurandion,3a,4,7,7a-tetrahydro-,cis-;3-Isobenzofurandione,3a,4,7,7a-tetrahydro-,cis-1;4,7,7a-tetrahydro-3-isobenzofurandioncis-3a;cis-3a,4,7,7a-Tetrahydro-1,3-isobenzofurandione;CIS-THPA;CIS-DELTA4-TETRAHYDROPHTHALICANHYDRIDE;CIS-4-TETRAHYDROPHTHALICANHYDRIDE;CIS-1,2,3,6-TETRAHYDROPHTHALICANHYDRIDE

Specification:

ITEMS	SPECIFICATION
CAS	935-79-5
MF	C8H8O3
MW	152.15
Melting point	98 °C
Boiling point	234.6°C
Density	1.2143
Flash point	156 °C
Color	White to almost white
Solubility	Soluble in toluene and benzene
Form	powder crystal
Storage condition	under inert gas (nitrogen or Argon) at 2-8°C

Overview:

Tetrahydrophthalic anhydride (THPA), whose molecular formula is C8H8O3, is mainly used as a curing agent for epoxy resins, a modifier for unsaturated polyester resins and alkyd resins, and is also an important ingredient in the synthesis of pesticides and pharmaceuticals. intermediate. The synthesis of tetrahydrophthalic anhydride is a typical Diels-Alder condensation reaction, that is, a 1,4 addition reaction occurs between unsaturated maleic anhydride containing ethylenic bonds as a dienophile and diene butadiene containing conjugated double bonds. That is, the diene and the dienophile pass through the cyclic transition state, the breaking of old bonds and the formation of new bonds occur simultaneously, completing the reaction process in one step.

application:

Tetrahydrophthalic anhydride, or tetrahydrophthalic anhydride, is an important chemical product with a wide range of uses. For example, it is used as a curing agent for epoxy resins, plasticizers, alkyd resins, and unsaturated polyesters. Resins are used to produce surfactants, wetting agents, emulsifiers, herbicides, plant growth inhibitors, insecticides, fungicides, insect repellents, fiber treatment agents, lubricant additives, etc.

Production method: The current production process route of tetrahydrophthalic anhydride at home and abroad is the addition reaction of maleic anhydride and 1,3-butadiene in the presence of a catalyst. It is a traditional and classic production method that has not yet been seen. There are reports on new production methods and process routes.

Package and transportation :

Package: 1kg,25kg,50kg,100kg,250kg