Tetrahydrophthalic anhydride (THPA)

Trade name of the product: tetrahydrophthalic anhydride

Chemical name of the compound: cis-1,2,3,6-tetrahydrophthalic anhydride

Synonyms: cis-4-cyclohexene-1,2-dicarboxylic anhydride; 1,2,3,6-tetrahydrophthalic acid anhydride; 1,2,3,6-tetrahydrophthalicacidanhydride; 1,2,3,6-tetrahydro-phthalicanhydrid; 1,3-isobenzofurandione, 3a,4,7,7a-tetrahydro-, cis-; 1,3-isobenzofurandione,3a,4,7,7a-tetrahydro-; 3a,4,7,7a-tetrahydro-1,3-benzofurandione; 3a,4,7,7a-tetrahydro-3-isobenzofurandione

Chemical and physical properties: A white crystalline powder or a transparent, lightly sticky and colorless or light-yellow liquid and aromatic smell

Application of the substance: Tetrahydrophthalic anhydride is used as an intermediate product for the production of polyesters, specialist resins (for instance alkyd resins), plastifiers, adhesives, fungicides and pesticides; it is one of the components in the production of certain paints and varnishes, and is also used as a hardener for epoxy resins.

Health safety: A very toxic substance! If absorbed by the respiratory passages, consumed or contacts the skin, it can cause serious injuries of the body or death. Inhaling the substance can irritate the lungs, causing cough and/or difficult breathing (dispnea). Inhaling bigger quantities can cause the fluid to gather in the lungs (edema) and dispnea. The contact with the melted substance can cause serious burns of the skin and eyes. Contact with the skin should be avoided. The consequences of the skin contact or inhalation can be delayed in time. The ignition of the substance can release irritating, caustic or toxic gases.

Wzór chemiczny: C₈H₈O₃
Gęstość:1,375 g/cm3
Numer CAS: 85-43-8
Numer WE/EINECS: 201-605-4