... briquette 4.factory supply Maleic AnhydrideCharacters: CAS NO :108-31-6 Byname :Maleic anhydride,cis-Butenedioic anhydride,Toxilic anhydride,2,5 ... question, welcome here!Maria QianHenan Allrich Chemical Co., LTDRoom 7F, Block B Fuhua Building, NO 59 Dongda Street, Zheng zhou China ... Fax: 86-371-86082812 Maleic Anhydride 99.5% (108-31-6)