Fluorescent Brightener 263 CAS 99549-42-5
Purity >95%In StockPharmaceutical Standards
| CAS No. | 99549-42-5 |
| Molecular Formula | C44H48N12O16S4 4*Na |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Fluorescent Brightener 263 (CAS 99549-42-5), a pharmaceutical standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C44H48N12O16S4 4*Na. Batch-specific COA and technical support are available on request.
Physical & Chemical Properties
| Molecular Formula | C44H48N12O16S4 4*Na |
| Molecular Weight | 1152.17 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 27.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 12 |
| Sulfur Atoms | 4 |
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Recommended Standards
- 2’-Bromo-2-hydroxyacetophenone (CAS 99233-20-2)
- Perfluorophenyl 4-methyl-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazine-7-carboxylate (CAS 921938-83-2)
- 4,7-Dichloro-8-fluoro-2-(methylthio)pyrido[4,3-d]pyrimidine (CAS 2454491-14-4)
- tert-Butyl n-{[(z)-n'-hydroxycarbamimidoyl](phenyl)methyl}carbamate (CAS 946385-09-7)
- 1H-IMIDAZOLE, 2-BROMO- 2-BROMO-1H-IMIDAZOLE 2-BROMOIMIDAZOLE 54624-57-6 BC004073 (CAS 54624-57-6)
- Methyl 2-oxo-2,3-dihydro-1H-pyrrolo[3,2-b]pyridine-5-carboxylate (CAS 1190311-14-8)
- Polyphemusin II-Derived Peptide (CAS 229030-20-0)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 13829788188 / jacky.chen@cato-chem.com