Water-insoluble natural dye, obtained from dried female scale insects (Cochenille). Main ingredient is carminic acid. For use as a dye in microscopy it is applied in conjunction with a mordant, usually based on aluminium, producing a well-staining calcium aluminium lake of carminic acid.
Suitability for microscopy | complies |
Absorption max. (in H2O) | 525-535 nm |
Loss on drying | ≤20.0 % |
Dye content | 50.0-55.0 % |