lithium sodium 4-[[4-[[4-(2-hydroxypropoxy)phenyl]azo]-5-methoxy-2-methylphenyl]azo]benzenesulphonate

4-[[4-[[4-(2-Hydroxypropoxy)phenyl]azo]-5-methoxy-2-methylphenyl]azo]benzenesulfonic acid/lithium/sodium,(1:x:x) salt