Alizarin yellow R/ Alizarin yellow RW /Alizarin orange

English name：Alizarin yellow R；Alizarin yellow RW；Alizarin orange；2-Hydroxy-5-[(4-nitrophenyl)azo]benzoic acid；5-(p-Nitrophenylazo)salicylic acid；C.I.Mordant orange 1；C.I. 14030 

Other names: p-Nitrobenzene azosalicylic acid; Mordant Orange 1; 5 - (4-nitrophenylazo) salicylic acid; Mordant orange; Mordant Orange 1; 3-nitroalizarin; Alizarin orange

CAS No.: 2243-76-7

C13H9N3O5=287.23

Grade: IND

PH discoloration range: 10.0 (yellow) ～ 12.0 (red)

Sensitivity test: acceptable

Water dissolution test: acceptable

Ethanol dissolution test: acceptable

Burning residue: 18.0 ～ 24.0%

Physicochemical properties : orange brown crystal. It decomposes at 253 ～ 254 ℃. It is soluble in water and ethanol, slightly soluble in acetone and ethylene glycol ether, and almost insoluble in other organic solvents.

Purpose: biochemical research. Acid base indicator, metal colorant. 1% sodium salt is usually used as indicator

Saving: RT