Mordant black, Black R, sodium (2,2'-dihydroxy naphthyl-(1) azonaphthalene-(1') 4-sulfonate), CALCON, Mordant Black R, RSS, Natrium-(2,2'-dihydroxy-naphthyl-(1)-azonaphthalin-(1')-4-sulfonat), 1-(2-Hydroxy-1-naphthylazo)-2-naphthol-4-sulfonic acid sodium salt, calcontm, Sunchromine Blue Black R, Eriochrome blue blackR, CALCON(R), CALCONE, Eriochrome Blue Black R, F-240, ZINCHROME R, Blue, Palatine Chrome Black 6BN, Eriochromblauschwarz R, Blue Black R