ORCEIN Property

Boiling point:

591.36°C (rough estimate)

Density 

1.3224 (rough estimate)

refractive index 

1.5800 (estimate)

storage temp. 

room temp

solubility 

Insoluble in water, benzene, chloroform, ether; soluble in ethanol, acetone, acetic acid; soluble in aqueous alkali

form 

Powder

pka

4.0, 6.9, 13.4(at 25℃)

color 

Dark brown to brown-black

Water Solubility 

Soluble in acetone, alcohol, acetic acid (red color), and dilute aqueous alkali (blue-violet color). Insoluble in water.

λmax

575 nm

Merck 

14,6863

Stability:

Stable.

Biological Applications

Diagnosis of liver biopsy; detecting Candida,hepatitis B surface antigen in fixed tissues,histamines,HBsAg in liver cell,microorganisms

EPA Substance Registry System

Orcein (1400-62-0)

Safety

Hazard Codes 

Xn

Risk Statements 

22

Safety Statements 

37/39-26-24/25

WGK Germany 

3

TSCA 

Yes

HS Code 

32129000

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P330Rinse mouth.

ORCEIN Chemical Properties,Usage,Production

Chemical Properties

dark brown crystals or powder

Uses

Orcein (cas# 1400-62-0) is an organic dye and histochemical stain. Orcein has also been used as a stain for extracellular matrices. Dyes and metabolites.

Uses

Biological stain.

Definition

ChEBI: A member of the class of benzofurans that is dibenzo[b,d]furan-3,7-dione bearing two methyl substituents at positions 1 and 9 as well as two 2,4-dihydroxy-6-methylanilino substituents at positions 2 and 8.

General Description

Orcein is a weakly acidic orange-red fluorochrome and is mainly required for the staining of elastic tissue. It is not specific for chromatin staining, however, in acidic solutions it works as a basic dye and stains basophilic chromosomes purple red.