Physical Form Bright orange-yellow powder Solubility Freely soluble in water; soluble in ethanol, cellosolve; insoluble in xylene Melting Point 300 C Absorption (l max ) 425 nm Synthesis Synthetic methods 1-25 ,91 dermal toxicity; 92 genotoxicity; 93-96 hyperactive behavior in children; 97 mutagenicity; 98-106 neurotoxicity; 107 pseudoallergic reactions; 108 reproductive toxicity 107 Ruoff, M. K.; Vittum, P. W. The formation of azomethine dyes from 4-anisylideneand 4,4 0 -anisylidenebispyrazolones. J. Am. Chem. Soc. 1950, 72, 4947-4949. 21. Freeman, K. A.; Jones, J. H.; Graichen, C. Coal-tar colors. VIII. FD&C yellow No. 5. J. Assoc. Off.