Vat Yellow 4 CAS 128-66-5
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 128-66-5 |
| Molecular Formula | C24H12O2 |
| Molecular Weight | 332.35 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Vat Yellow 4 (CAS 128-66-5) is a pharmaceutical standards certified reference material from CATO. Molecular formula: C24H12O2. Molecular weight: 332.35 g/mol. ISO 17034 accredited production ensures traceable purity and reliable analytical results.
Physical & Chemical Properties
| Molecular Formula | C24H12O2 |
| Molecular Weight | 332.35 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Vat Standards
Recommended Standards
- 4-(tert-butoxycarbonyl)-1-(3-cyanopyridin-2-yl)piperazine-2-carboxylic acid (CAS 1261229-55-3)
- (1-(2,5-Dichlorobenzyl)piperidin-4-yl)methanol (CAS 1289387-72-9)
- 1'-(Tert-Butoxycarbonyl)-2-Oxospiro[Indoline-3,3'-Pyrrolidine]-4'-Carboxylic Acid (CAS 1251011-21-8)
- 1-(Azepan-1-yl)-2-(4-hydroxypiperidin-1-yl)ethan-1-one (CAS 1208726-57-1)
- 1-[2-(4-Amino-1h-pyrazol-1-yl)ethyl]pyrrolidin-2-one (CAS 1250550-94-7)
- Methyl 1-(2-bromoethyl)-4-iodo-1H-pyrrole-2-carboxylate (CAS 1416221-50-5)
- 3-(5-Bromo-2-chlorophenyl)-1-methyl-1h-pyrazol-5-amine (CAS 1153432-73-5)
- 2-(2,5-Dimethyl-1H-pyrrol-1-yl)-5-(pyrrolidin-2-yl)pyridine (CAS 1352522-37-2)
- Meldonium Impurity 1 (CAS 3288-80-0)
- (Des-Gly2)-Exenatide trifluoroacetate salt (CAS 1678416-78-8)
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