Fast Red Frn Salt Fast Colour Salts belongs to the category of Fast Colour Salts having CAS number 1324-54-5. The synonym of Fast Red Frn Salt Fast Colour Salts is Fast Red FRN Salt. The molecular weight of Fast Red Frn Salt Fast Colour Salts is 290.57 g/mol and the molecular formula is C12H10Cl3NO. The colour index number is 37075. The physical appearance of Fast Red Frn Salt Fast Colour Salts is Light Grey.