O7380

Orcein

Powder or crystals

• Synonym(s): Natural Red 28
• CAS Number: 1400-62-0
• UNSPSC Code: 12171500
• NACRES: NA.47
• EC Number: 215-750-6
• MDL number: MFCD00062310

Properties

• Product Name: Orcein, synthetic
• biological source: synthetic
• Quality Segment: 100
• 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
• SMILES string: N(c5c(cc(cc5C)O)O)C1=C(c2[c]([o][c]3c2C(=C(C(=O)C=3)Nc4c(cc(cc4C)O)O)C)=CC1=O)C
• 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

Description

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.

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: dust mask type N95 (US), Eyeshields, Gloves