Carminic acid ≥90% (by HPLC), Sigma-Aldrich®

Supplier: SIGMA-ALDRICH MICROSCOPY


M-Clarity™ quality level = MQ100

229253-5GEA 414 EUR
229253-5G SIAL229253-10G 229253-1G
Carminic acid ≥90% (by HPLC), Sigma-Aldrich®
Carminic acid

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.

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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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