Carmine, Certified 

Carmine is a pigment of a bright-red color obtained from the aluminum complex derived from carminic acid. Carmine is used in histology to stain glycogen.

Specifications:

Synonyms:                                                              Natural Red 4, C.I. 75470

CAS No:                                                                   1390-65-4

Chemical Formula:                                                C22H20O13

Formula Weight:                                                    492.39

Appearance:                                                           Red to Purple Powder

Assay:                                                                      95 % Minimum

Lambda Max:                                                         495 nm