Orcein
SIAL/O7380 - synthetic
Synonym: Natural Red 28
CAS Number: 1400-62-0
EC Number: 215-750-6
MDL Number: MFCD00062310
Product Type: Chemical
| εmax | ≥400 at 580 nm in 0.1 M NaOH |
| application(s) | diagnostic assay manufacturing hematology histology |
| biological source | synthetic |
| color | dark brown |
| composition | Carbon: 41.72% Nitrogen: 2.23% |
| form | powder or crystals |
| InChI | 1S/C28H24N2O7/c1-11-5-15( |
| InChI key | VPEASJIRGSVXBF-UHFFFAOYSA |
| Quality Level | 100  |
| solubility | 1 M NaOH: 1 mg/mL, clear |
| storage temp. | room temp |
| 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. |
| 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. |
| Hazard Codes | Xn |
| Risk Statements | 22 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 3 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Storage Temp. | room temp |
| UNSPSC | 12171500 |