Carmine Borax (Grenacher) (Borax carmine) is an anhydrous borate salt with a CAS number of 77-85-0 and a molecular weight of 169.89 g/mol. Common uses of this product include use as an emulsifier in food products, as a buffering agent in cosmetics, and as a mild antiseptic. It is also used as a fire retardant, and as an industrial cleaner and degreaser.