Basic

CAS No.	134-08-7
Product Name	4-sulphophthalic anhydride
Synonyms	5-Isobenzofuransulfonic acid, 1,3-dihydro-1,3-dioxo-; 4-Sulfophthalic anhydride; NSC 26435; 4-Sulphophthalic anhydride; Phthalic anhydride, 4-sulfo- (8CI); 1,3-dioxo-1,3-dihydro-2-benzofuran-5-sulfonic acid
Molecular Formula	C8H4O6S
Molecular Weight	228.1788

Physical property

Density	1.82g/cm3
Refractive index	1.66