... Anhydride briquette 4.factory supply Maleic AnhydrideCharacters: CAS NO :108-31-6 Byname :Maleic anhydride,cis-Butenedioic anhydride,Toxilic anhydride,2 ... (Pt - Co), APHA≤25Crystallization point ,°C≥52.4Ash ,%≤0.005Iron (Fe) ,PPM≤5Application: a.Maleic anhydride's main purpose is to ... -66396550 Fax: 86-371-86082812 Maleic Anhydride 99.5% (108-31-6)