Pigment Yellow 181 CAS 74441-05-7
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 74441-05-7 |
| Molecular Formula | C25H21N7O5 |
| Molecular Weight | 499.48 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Pigment Yellow 181 (CAS 74441-05-7) is a high-purity pharmaceutical standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C25H21N7O5. Molecular weight: 499.48 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C25H21N7O5 |
| Molecular Weight | 499.48 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Nitrogen Atoms | 7 |
Related Pigment Standards
Recommended Standards
- Diethyl 2-(((2-fluorophenyl)amino)((2-oxo-2-(4-(trifluoromethyl)phenyl)ethyl)thio)methylene)malonate (CAS 866153-23-3)
- tert-Butyl (S)-(6-acetamido-1-oxo-1-((2-oxo-4-(trifluoromethyl)-2H-chromen-7-yl)amino)hexan-2-yl)carbamate (CAS 787549-23-9)
- (Z)-{[2-(2H-1,3-benzodioxol-5-yl)cyclopropyl](4-methoxyphenyl)methylidene}({2-[3-(trifluoromethyl)phenoxy]ethoxy})amine (CAS 338749-20-5)
- 6-Bromothiochroman-3-amine hydrochloride (CAS 1263378-81-9)
- tert-Butyl 2-(((6-(cyclopropylamino)pyrimidin-4-yl)amino)methyl)pyrrolidine-1-carboxylate (CAS 1353946-94-7)
- 5-(Hydroxy(phenyl)methyl)furan-3-carboxylic acid (CAS 37744-70-0)
- cis-4-methoxycyclohexan-1-amine hydrochloride (CAS 61367-43-9)
- 2-amino-1-[4-(trifluoromethoxy)phenyl]ethan-1-ol hydrochloride (CAS 1384079-66-6)
- 1-(Difluoromethyl)-4-ethynyl-5-methyl-1H-pyrazole (CAS 1855889-94-9)
- Semaglutide impurity 50 (CAS 2773558-66-8)
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