Orcein
Name: Orcein
CAS Registry Number: 1400-62-0
Chemical Structure: Orcein is a mixture of 14 dyes. The major components of orcein are given below:
CA Index Name: Orcein
Other Names: C.I. 1242; C.I. Natural Red 28
Merck Index Number: 6863
Chemical / Dye Class: Phenoxazine
Molecular Formula: Unspecified (it is a mixture)
Molecular Weight: Unspecified (it is a mixture)
Physical Form: Brownish-red or brownish-black powder or crystals
Solubility: Insoluble in water, benzene, chloroform, ether; soluble in ethanol, acetone, acetic acid; soluble in aqueous alkali
Melting Point: Unspecified (it is a mixture)
Boiling Point: Unspecified (it is a mixture)
pKa: 4.0, 6.9, 13.4
Absorption (λmax): 575 nm
Emission (λmax): 585-590 nm
Synthesis: Synthetic methods
Staining Applications: Bronchial elastic fibers; chromosomes; eosinophil granules; elastic fibers; embryos; fibronectin; vitronectin; hepatocytes; hepatitis B virus; hepatitis; hepatocellular carcinoma; hepatitis B surface antigen (HBsAg); histamine; Kupffer cells; leukocytes; lipids; mucins; lipoproteins; plasma proteins; nucleic acids; oocytes; hairs
Biological Applications: Diagnosis of liver biopsy; detecting Candida, hepatitis B surface antigen in fixed tissues, histamines, HBsAg in liver cell, microorganisms
Industrial Applications: Textiles
Safety / Toxicity: Carcinogenicity
Certification / Approval: Certified by Biological Stain Commission (BSC)
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