Carminic acid ≥90% (by HPLC), Sigma-Aldrich®
Supplier: SIGMA-ALDRICH MICROSCOPY
M-Clarity™ quality level = MQ100
Carmine is a cochineal product usually furnished as an aluminum and calcium salt of carminic acid. Carminic acid is used for human-medical cell diagnosis and serves the purpose of the histological investigation of sample material of human origin. It is suitable for staining nuclei in histological sections. It is utilised in various staining methods including the procedure for detection of glycogen and mucous substances (Best′s carmine), for nuclear staining, or vital staining.
Carminic acid (CI 75470) is used in Orth′s lithium carmine technique for nuclear staining, Best′s stain for glycogen, and Southgates′s mucicarmine method.
Specification Test Results
Appearance (Color) | Red to Very Dark Red and Purple and Red-Purple and Purple-Red |
Appearance (Form) | Powder |
Infrared spectrum | Conforms to Structure |
Wavelength c = 0.03g/L; Ethanol | 494 - 500 nm |
Extinction Coefficient | ≥5000 |
Wavelength | 275 - 281 nm |
Extinction Coefficient | ≥18000 |
Wavelength | 222 - 228 nm |
Extinction Coefficient | ≥13000 |
Purity (HPLC) | ≥90.0 % |
Solubility (Turbidity) c = 1%; 1N Acetic Acid | Clear to Hazy |
Solubility (Color) | Red to Very Dark Red |
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