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good quality naproxen sodium:
Another Name: (S)-6-Methoxy-alpha-methyl-2-naphthaleneacetic acid sodium salt
Molecular Formular: C14H13NaO3
Molecular Weight: 252.24
CAS NO: 26159-34-2
Appearance: White or almost white crystalline powder
Standard: USP31
| Item | Standard(USP31) |
| Appearance | White to almost white crystalline powder |
| Infrared absorption | The infrared absorption spectrum is concordant with the reference spectrum |
| Ultraviolet absorption | Absorptivities at 272nm, calculated on the dried base, do not differ by more than 3% |
| Specific rotation | -17.0°~ -15.3° |
| Loss on drying | ≤1.0% |
| Heavy metals | ≤0.002% |
| Free Naproxen | ≤1.0% |
| Impurity D( in house) | ≤0.10% |
| Impurity E( in house, Impurity C in EP) | ≤0.10% |
| Any other impurity | ≤0.10% |
| Total impurities | ≤1.0% |
| Toluene | ≤50ppm |
| Methanol | ≤50ppm |
| Hthanol | ≤100ppm |
| Assay( On the dried basis ) | 98.0%~102.0%; |
Packing: 25kg/drum;
Usage: This product is one kind of NSAIDs with anti-inflammatory, analgesic, antipyretic effect.
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good quality naproxen sodium