Variable pigment 2R / chromic acid 2R / phenylazo sodium chromic acid / chromic blue 2R

English name：Chromotrope 2R；Chromotrope blue 2R；Chromotrope N2R；Acid phloxin GR；Carmoisine XL6R；Fast fuchsin G；Benzeneazo-1,8-dihydroxynaphthalene-3,6-disulfonic acid sodium salt；C.I.16570 

Other names: chromotropic acid 2R; Sodium phenylazo chromotropic acid; Chrome blue 2R; Acid red 29; Chromic acid 2R; Chromin 2R

CAS No.: 4197-07-3

C16H10N2Na2O8S2=468.37

Grade: ar

Magnesium sensitivity test: acceptable

Water dissolution test: acceptable

Physicochemical properties: brownish red powder. Soluble in water, magenta, soluble in ethanol and acetone, insoluble in other organic solvents

Purpose: biochemical research. Biological dyeing, often with hematoxylin as a counterstaining agent.

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