CAS number:127-79-7

Molecular formula:C11H12N4O2S

molecular weight:264.3

Chemical structure:

Product name: Sulphamerazine base
Expiry Date: Four years
Inspection Standard: USP23
Analysis content Specifications Analysis Results
Identification A: The infrared absorption spectrum; Meets A and B examine
B: The cupric sulfate reaction test.
Melting point 234-239℃ 234.2-235.2℃
Description White, yellowish-white or pinkish white, crystals or powder. Meets.
Appearance of solution Clear and not more deeply colored than reference solution Y4,BY4 or GY4. Clear, <BY4
Acidity ≤0.5ml <0.5ml
Related substances Meets(≤0.5%) Meets<0.5%
Heavy metals ≤0.002% <0.002%
Loss on drying ≤0.5% 0.1%
Residue on ignition ≤0.1% 0.04%
Selenium ≤0.003% <0.003%
Assay(%) 99.0%--100.5%(The dried substance) 99.9%(The dried substance)
Conclusion : Meets USP23 specification