... : 108-31-6 2,HS Code: 291714003,Type: Flake and Briquette4,Application: It used in production of unsaturated ... of plastics, etc. It is main material of binary acid with four carbons, 1,4-butanediol r-butyrolactone, tetrahydrofuran5, ... the production and sale of Maleic anhydride, Betanaphthol, J acid, NSF, Coal Tar Pitch, Benzene, Anthrancene oil, It ... by Mid-May, 2009. MALEIC ANHYDRIDE BRIQUETTE/FLAKE