Fast Black K Salt Fast Colour Salts belongs to the category of Fast Colour Salts having CAS number 64071-86-9. The synonym of Fast Black K Salt Fast Colour Salts is Fast Black K Salt. The molecular weight of Fast Black K Salt Fast Colour Salts is 417.88 g/mol and the molecular formula is C14H12ClN5O4. The colour index number is 37190. The physical appearance of Fast Black K Salt Fast Colour Salts is black.