Direct Blue 71 Dyes belong to the category of Dyes having CAS number 4399-55-7. The synonym of Direct Blue 71 Dyes is Direct Fast Blue B2RL, Direct Navy BlueL-3RB, Direct Fast Blue B2R,Sirius Blue S-BRR, Direct Fast Blue 2RL, Solophenyl Blue GL. The molecular weight of Direct Blue 71 Dyes is 1029.87 g/mol and the molecular formula is C40H23N7Na4O13S4. The colour index number is 34140. The physical appearance of Direct Blue 71 Dyes is Blue Gray.