Acid Black 2 (NIGROSINE BLACK) SUPPLIERS General Description Product name: Acid Black 2 Other name: Nigrosine Water Soluble, Nigrosine W/S, Lurazol Deep Blue EB, Acid Nigrosine C.I. NO.: 50420 CAS NO.: 8005-03-6 Acid black 2 is black and shining particle, soluble in water easily, soluble in alcohol and blue in alcohol. Blue in dense sulphuric acid, purple precipitate after dilution. Blue purple in water and dark purple precipitate with NaOH.
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