Acid black att 1. Cas no.: 167954-13-4 2. Mf: c22h14n6na2o9s2 3. Einecs no.: 213-903-1 4. H.S. Code :32041200 5. Appearance: reddish dark brown powder 6. Place of origin: hebei, china (mainland) Specification: Index no.:acid black att 4092 Dry mixture:red brown with metal luster Wet mixture:black even powder/red powder Strength:130%, 120%, 110%, 100% Moisture %:3.0 Water insoluble matter %0.2% Fineness (residue on 80mesh screen) %1.0 Light fastness:7 Water fastness:4-5 Sweat fastness:5 8. Usage: Used in leather dyeing, febric dyeing like wool, silk and nylon. 9. Package: 25kg/bag or drum. 12mt/20’fcl.