Specification: |
Para Red (CAS NO.6410-10-2), its Synonyms are 1-((4-Nitrobenzene)azo)-2-naphthol ; 1-((4-Nitrophenyl)azo)-2-naphthol ; 1-((p-Nitrophenyl)azo)-2-naphthol ; 2-Naphthalenol, 1-((4-nitrophenyl)azo)- ; C.I. Pigment Red 2 ; C.P. Britelite Toner RP-9 ; C.P. Para Toner Light RP-2 ; Carnelio Para Red BS ; Carnelio Para Red YS ; Conc. Para Red ; Conc. Para Red YS ; Dainichi Para Red Toner .
Para Red is a chemical dye. Chemically, the dye is similar to Sudan I. The dye was discovered in 1880 by von Gallois and Ullrich, and was the first azo dye. It dyes cellulose fabrics a brilliant red, but is not very fast. The dye can be washed away easily from cellulose fabrics if not dyed correctly. Throughout making Para Red, the solution will become acidic and basic. Small amounts of byproducts may be left over after the Para Red dye is made that may be acidic or basic, but if made correctly there are little of these and the byproducts have no effect.
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