O7380
Orcein
Powder or crystals
Synonym(s):
Natural Red 28
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About This Item
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Product Name
Orcein, synthetic
biological source
synthetic
Quality Level
form
powder or crystals
composition
Carbon: 41.72%
Nitrogen: 2.23%
color
dark brown
solubility
1 M NaOH: 1 mg/mL, clear
εmax
≥400 at 580 nm in 0.1 M NaOH
application(s)
diagnostic assay manufacturing
hematology
histology
storage temp.
room temp
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General description
Orcein or CI Natural Red 28 is an elastic tissue stain. The fluorescence properties of Orcein show maximum emission peak at 587 nm (low concentration) and 620 nm (high concentration) upon suitable excitation and acidic pH.
Application
Orcein is highly recommended as a vital stain for elastic fibers and lamellae. Orcein is used as a nuclear stain for mounting embryos and assessing the maturation of oocytes. Other routine applications of orcein involve the staining of plant chromosomes.
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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Journal of microscopy, 144(Pt 1), 45-53 (1986-10-01)
The fluorescence properties of orcein are described in this paper. Under suitable exciting light, acidic solutions of orcein showed emission peaks at 587 nm (low concentration) and at 620 nm (high concentration). In fluorescence microscopy an intense orange-red emission was
Popescu P and Hayes H
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Numerous cellular and extracellular components should be analyzed in sections of atherosclerotic plaques to assess atherosclerosis progression and vulnerability. Here, we combined orcein (O) staining for elastic fibers and martius scarlet blue (MSB) polychrome to visualize various morphological contents of
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