CAS number:144-83-2

Molecular formula:C11H11N3O2S

molecular weight:249.29

Chemical structure:

Product name:     Sulphapyridine
Expiry Date:  Three years
Inspection Standard:  USP25
Items Specifications Results
Description off-white or yellowish-white crystalline powder off-white crystalline powder
Clarity and colour of solution Clear not deeper than pale yellow Clear not deeper than pale yellow
Identification Conform Withmonograph A.B.C Pass
Melting point 190--193℃ 190.4--191.2℃
Heavy metals ≤0.002% Pass
Acidity ≤0.2ml 0.19ml
Loss on drying ≤0.5% 0.24%
Sulphated ash ≤0.1% 0.08%
Assay  99.0---101.0% 99.52%
Conclusion : PASS