Sulfapyridine may be used as a reference standard in the determination of sulfapyridine in milk samples[2]and plasma samples[3]using electrochemical magneto immunosensing assay technique[2]and high performance liquid chromatography (HPLC) respectively.

For R&D use onlynot for drug household or other uses.

Sulfapyridine is a metabolite of Sulfasalazine. It is an antibiotic and is mostly used in treating rheumatoid arthritis.