131013-81-5 Acid yellow 23, tetramethylammonium salt Methanaminium, N,N,N-trimethyl-, salt with 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-((4-sulfophenyl)azo)-1H-pyrazole-3-carboxylic acid (3:1) Prism yellow RCC NOTOX substance 9747