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CAS number： 26159-34-2
Molecular formula：
molecular weight：
Chemical structure：
| PRODUCT NAME | NAPROXEN SODIUM | |
| SHELF LIFE | 3 years | |
| ITEMS | SPECIFICATIONS | RESULTS |
| APPEARANCE | WHITE TO ALMOST WHITE CRYSTALLINE POWDER | WHITE CRYSTALLINE POWDER |
| IDENTIFICATION |
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| A.INFRARED ABSORPTION | THE INFRARED ABSORPTION SPETRUM IS CONCORDANT WITH THE REFERENCE SPECTRUM | COMPLIES |
| B. ULTRAVIOLET ABSORPTION | ABSORPTIVITIES AT 2725NM,CALCULATED ON THE DRIED BASE, DO NOT DIFFER BY MORE THAN 3% | 1% |
| SPECIFIC ROTATION | -17° -- -15.3° | -16.8° |
| LOSS ON DRYING | ≤1.0% | 0.1% |
| HEAVY METALS | ≤0.002% | <0.002%< td=""> |
| FREE NAPROXEN | ≤1.0% | 0.1% |
| RELATED SUBSTANCES(HPLC) |
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| IMPURITY D(IN-HOUSE) | ≤ 0.1% | <0.01%< td=""> |
| IMPURITY E (IN-HOUSE,IMPUROTI C ON EP) | ≤ 0.1% | <0.01%< td=""> |
| ANY OTHER IMPURITY | ≤ 0.1% | <0.01%< td=""> |
| TOTAL IMPURITIES | ≤ 0.5% | <0.01%< td=""> |
| RESIDUAL SOLVENTS |
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| TOLUENE | ≤50PPM | <1ppm< td=""> |
| METHANOL | ≤50PPM | <4ppm< td=""> |
| ASSAY (ON DRIED BASIS) | IT CONTAINS C14H13NAO3 98.5%-101.5% | 99.3% |
| CONCLUSION | COMPLIES WITH USP38 STANDARD | |