Naproxen Impurity 44 CAS 90494-58-9
Purity ≥95%In StockPharmacopoeial Impurity Standards
| CAS No. | 90494-58-9 |
| Molecular Formula | C19H23BrO3 |
| Molecular Weight | 379.29 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Naproxen Impurity 44 (CAS 90494-58-9) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C19H23BrO3. Molecular weight: 379.29 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C19H23BrO3 |
| Molecular Weight | 379.29 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | ≥95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Br-containing |
Related Naproxen Standards
- Naproxen Impurity 43 (CAS CATO-C4X-170843)
- Naproxen Impurity N2 (CAS 80336-62-5)
- Naproxen Impurity 33 (CAS CATO-C4X-170833)
- Naproxen EP Impurity D (CAS 116883-61-5)
- Naproxen EP Impurity D (CAS 116883-62-6)
- (R)-Naproxen Acyl-β-D-glucuronide (CAS 112828-15-6)
- (S)-Naproxen Acyl-beta-D-glucuronide (CAS 41945-43-1)
- (S)-Naproxen Iso-acyl-β-D-glucuronide (CAS 219476-92-3)
Recommended Standards
- 1-Benzyl-4-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)piperazine (CAS 1015242-03-1)
- tert-butyl N-(4-bromo-3-cyano-7-fluoro-benzothiophen-2-yl)carbamate (CAS 2649788-79-2)
- Farnesyl Diphosphate(FPP) Trisammonium Salt (CAS 104715-19-7)
- Apremilast Impurity 113 (CAS CATO-C4X-1009113)
- Cefprozil impurity 64 (CAS CATO-C4X-149264)
- (R)-2-((2-(Hydroxybis(4-methoxyphenyl)methyl)pyrrolidin-1-yl)methyl)-6-(trifluoromethyl)phenol (CAS 2346493-92-1)
- 1-chloro-4-(chloromethyl)-2-nitrobenzene 591248-66-7 AR-1C2390 (CAS 591248-66-7)
- N-Allyl-N-hydroxypent-4-enamide (CAS 87842-83-9)
- tert-Butyl 4-(4-fluorophenyl)-3-(hydroxymethyl)piperidine-1-carboxylate (CAS 936497-90-4)
- Tau Peptide (512-525) amide trifluoroacetate salt (CAS 2022956-61-0)
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