CALCIUM FAST PURPLE;ERIOCHROME BLUE BLACK SE;ERIOCHROME BLUE SE;ERIOCHROME(R) BLUE SE;CI 16680;CI NO 16680;3-(5-CHLORO-2-HYDROXYPHENYLAZO)-4,5-DIHYDROXY-2,7-NAPHTHALENEDISULFONIC ACID DISODIUM SALT;3-(5-CHLORO-2-HYDROXYPHENYLAZO)-4,5-DIHYDROXYNAPHTHALENE-2,7-DISULFONIC ACID DISODIUM SALT