Erioglaucine disodium salt/Acid Blue 9/Alphazurine FG/C.I. Food Blue 2/C.I. 42090

English Name: ERIOGLAUCINE disodium salt; Acid Blue 9； Alphazurine FG； C.I. Food Blue 2； C.I. 42090

Other names: edible pigment bright blue; Acid blue 9; Papaver red disodium salt; Bis [4 - (n-ethyl-n-3-sulfonic acid benzyl) aminophenyl] - 2-sulfonic acid toluene disodium salt; Food blue 1; Wool poppy red a; C. I. food Blue 2 (42090); Edible bright blue; Edible pigment blue No. 1; Bright blue 1

CAS No.: 3844-45-9

C37H34Na2N2O9S3=792.85

Grade: br

Content: ≥ 85.0%

λ max：625～630nm

Infrared spectrum identification: match with the reference substance

UV spectrum: conform to

Loss on drying: ≤ 10% (135 ℃)

Absorbance min.:0.350 (2.5mg/l, 0.02mol/l ammonium acetate solution, 625 ~ 630nm) (on a dry basis)

 Physicochemical Properties: red purple or dark purple powder with metallic luster. Soluble in water, the aqueous solution is blue. Soluble in glycerol, ethanol and propylene glycol. It has good light resistance, heat resistance, acid resistance and alkali resistance, and is stable to citric acid and tartaric acid. Melting point: 283 ℃

Purpose: biochemical research. Biological stain.

Save: RT, away from light