aftalensulfonska kiselina,4-amino-3-[[4-[[2-(sulfoksi)etil]sulfonil]fenil]azo]- dinatrijevu sol (CAS RN 250688-43-8), ili
aftalensulfonsyra, 4-amino-3-[[4-[[2-(sulfooxi)etyl]sulfonyl]fenyl]azo]-, dinatriumsalt (CAS RN 250688-43-8), eller