Brilliant Crystal Scarlet C.I. 16250

Ponceau 6R, or Crystal ponceau 6R, Crystal scarlet, Brilliant crystal scarlet 6R, Acid Red 44, or C.I. 16250, is a red azo dye. It is soluble in water and slightly soluble in ethanol. It is used as a food dye, with E Number E126. It is also used in Histology, for staining fibrin with the MSB Trichrome stain. It usually comes as disodium salt.

• Histology
• Food dyes

C.I. 16250; Acid Red 44; Ponceau 6R; Crystal Ponceau 6R; Brilliant Crystal Scarlet 

Molecular Formula: C20H12N2Na2O7S2 

Molecular Weight: 502.43

Description: Dark brown powder 

Melting Point: >300 Deg. C 

Lambda Max: 509-514 nm  

Dye content: ~ 80%                                                   

Solubility 0.1% (Water): Clear red solution 

Loss on drying: <20% at 110 Deg. C/ 1 hour 

Cas Number: 2766-77-0

HS Code / Commodity Code: 27667700

Hazard Phrases: H0001