Indigo Carmine, 80+% (Dye Content), 100g

Indigo Carmine, 80+% (Dye Content), 100g
For Research & Development
Not for drug, human, animal, or food use

Specifications:
Appearance (Color) Purple
Appearance (Form) Powder
Dye Content (Dried Basis) 80+%
Loss on Drying <5.0%
Visual Transition Interval from pH 11.5 (blue) to pH 14.0 (yellow)
Aqueous Solubility 1g in 100ml at 25 Deg. C
Subsidiary Dyes, excluding disodium-3,3-dioxo-2,2-bi-indolylidine-5,7-disulfonate <1%
Dye Intermediates <0.5%
Arsenic <8 ppm
Lead <0.001%
Sulfur 13.0-14.0%
Mercury <1 mg/kg
Cadmium <1 mg/kg
Heavy Metals (as Pb) <40 mg/kg

CAS: 860-22-0

FORMULA: C₁₆H₈N₂Na₂O₈S₂