Syonyms Name: C.I. 24410; C.I. Direct Blue 1; C.I. Direct Blue 1, tetrasodium salt; Direct Blue 1; chicago sky blue 6B (C.I. 24410); Pontamine Sky Blue 6BX; PontamineSkyBlueBX; Chicago Sky Blue?B; tetrasodium (6Z)-4-amino-6-({4'-[(2E)-2-(8-amino-1-oxo-5,7-disulfonatona