Naproxen Sodium USP | Specification

Sl.Tests ParametersSpecification
1DescriptionWhite or almost white, hygroscopic, crystalline powder.
2SolubilityFreely soluble in water, freely soluble or soluble in methanol, sparingly soluble in ethanol (96 percent).
3Identification  Infrared absorption spectrophotometry, Ultraviolet and visible absorption spectrophotometry, and specific optical rotation.
4Loss on DryingMaximum 1.0 percent, determined on 1.000 g by drying in an oven at 105 °C for 3 h.
6AssayNaproxen Sodium: 98.0 percent to 101.0 percent (dried substance).

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