2,2-Diphenyl-1-Picrylhydrazyl (Free Radical) CAS 1898-66-4
Purity >95%In StockPharmaceutical Standards
| CAS No. | 1898-66-4 |
| Molecular Formula | C18H12N5O6 |
| Molecular Weight | 394.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2,2-Diphenyl-1-Picrylhydrazyl (Free Radical) (CAS 1898-66-4) is a high-purity pharmaceutical standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C18H12N5O6. Molecular weight: 394.32 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C18H12N5O6 |
| Molecular Weight | 394.32 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°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) | 15.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 5 |
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Recommended Standards
- (3R,4R)-Gemcitabine Impurity 23 (CAS CATO-C4X-137223)
- (2-Bromophenyl)(4-(((furan-2-ylmethyl)thio)methyl)piperidin-1-yl)methanone (CAS 1396845-13-8)
- N-(3,4-difluorophenyl)-3-(4-fluoro-2-nitrophenoxy)thiophene-2-carboxamide (CAS 306977-60-6)
- 2-[4-(4-tert-Butylbenzoyl)piperazin-1-yl]pyrimidine (CAS 546080-20-0)
- 6,11-Dihydro-5H-benzo[a]carbazole (CAS 21064-49-3)
- 1-(4-(Diethylamino)phenyl)thiourea (CAS 3394-70-5)
- 4-(2-(Azepan-1-yl)-2-oxoethoxy)benzaldehyde (CAS 767630-86-4)
- 7-Hydroxy-3-propionyl-2h-chromen-2-one (CAS 500364-48-7)
- 3-(Aminomethyl)benzaldehyde (CAS 219919-14-9)
- Semaglutide impurity 100 (CAS CATO-C4X-2226100)
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