... of Formic Acid, and can supply good products with best price. 2. main used in the leather auxiliary industry Formic AcidCAS ... Silage,etc. Specifications: ITEM First grade Second Grade Colour Index 10 max 20 max Purity 90% min 85% min Sulphate as ... , leather industry, printing and dyeing industry, chemical industry, rubber industry, steel industry, paper industry, pesticide industry, food industry ...