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O7505

Sigma-Aldrich

Orcein

synthetic, certified by the Biological Stain Commission

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Synonym(s):
Natural Red 28
CAS Number:
EC Number:
MDL number:
NACRES:
NA.47

biological source

synthetic

Quality Level

grade

certified by the Biological Stain Commission

form

powder

solubility

1 M NaOH: 1 mg/mL

εmax

≥250% at 574-582 nm in NaOH at 0.01 M

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

InChI

1S/C28H24N2O7/c1-11-5-15(31)7-17(33)25(11)29-27-13(3)23-21(9-19(27)35)37-22-10-20(36)28(14(4)24(22)23)30-26-12(2)6-16(32)8-18(26)34/h5-10,29-34H,1-4H3

InChI key

VPEASJIRGSVXBF-UHFFFAOYSA-N

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1 of 4

This Item
861006198269C6277
vibrant-m

O7505

Orcein

vibrant-m

861006

Eosin B

vibrant-m

198269

Erythrosin B

vibrant-m

C6277

Congo Red

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

form

powder

form

powder

form

powder

form

powder

solubility

1 M NaOH: 1 mg/mL

solubility

H2O: 1 mg/mL, clear, red

solubility

H2O: 1 mg/mL, clear

solubility

H2O: 10 mg/mL

εmax

≥250% at 574-582 nm in NaOH at 0.01 M

εmax

-

εmax

-

εmax

-

storage temp.

room temp

storage temp.

room temp

storage temp.

room temp

storage temp.

room temp

Suitability

Certified for use in Darrow′s elastic fiber stain; Orcein method for hepatitis B surface antigen.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves


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Kamelija Zarkovic et al.
Redox biology, 4, 109-117 (2015-01-02)
Vascular aging is associated with structural and functional modifications of the arteries, and by an increase in arterial wall thickening in the intima and the media, mainly resulting from structural modifications of the extracellular matrix (ECM) components. Among the factors
Sharma AK and Sharma A
Chromosome Techniques: Theory and Practice (2014)
Ying-Hua Xuan et al.
The Korean journal of parasitology, 45(1), 1-9 (2007-03-22)
The endosymbionts of 4 strains of Acanthamoeba (KA/E9, KA/E21, KA/E22, and KA/E23) isolated from the infected corneas of Korean patients were characterized via orcein stain, transmission electron microscopic examination, and 16S rDNA sequence analysis. Double membrane-bound, rod-shaped endosymbionts were distributed
Elastofibroma dorsi.
Jan Janzen
Diagnostic cytopathology, 35(5), 311-312 (2007-04-12)
István Sejben et al.
Journal of clinical pathology, 63(7), 575-578 (2010-05-27)
To assess venous invasion (VI) and its relation to distant metastases in colorectal cancer (CRC). Primary untreated CRC cases were assessed for VI. All tumour blocks were stained with H&E and orcein. The presence of VI and nodal status were

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