Appearance is white to off-white crystalline powder, uniform texture, no caking, no visible mechanical impurities, conforming to the standard requirement.
HPLC chemical purity requirement is not less than 98.0%, the tested result is 98.56%, which meets the specification.
Related substances control: single impurity not more than 0.50%, total impurities not more than 1.00%, actual tested single maximum impurity 0.32%, total impurities 0.78%, compliant with limit standard.
Water content maximum limit is 0.30%, tested by Karl Fischer method, actual result 0.16%, within qualified range.
Residue on ignition shall not exceed 0.10%, actual measured value 0.05%, meets the specification.
Heavy metals total content limit is less than 10ppm, actual test result is less than 5ppm, qualified.
Melting point standard range 126–130°C, actual measured melting point 127.2–129.5°C, conforms to standard.
Solubility performance: slightly soluble in water, freely soluble in methanol, ethanol and ethyl acetate, solubility test complies with requirements.
Storage requirement: keep sealed, store at room temperature, dry and away from light, shelf life 24 months under specified storage conditions.
Conclusion: All test items of this batch comply with the established quality standard, the product is qualified.
It serves as a key fine chemical raw material and pharmaceutical intermediate. Widely applied in organic synthesis, pharmaceutical molecule construction and pesticide intermediate preparation. It is also used in the research and production of chemical reagents, daily chemical additives and liquid crystal material intermediates.
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