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Chemical name：4-Butyl-1,2-diphenyl-3,5-pyrazolidinedione
Molecular formula：C₁₉H₂₀N₂O₂
Molecular weight：308.38
CAS：50-33-9
Structural formula：

Specification：
A：In accordance with Drug standard of the Ministry of Health of PRC 
Appearance：White or off-white crystalline powder
Melting point：104～107℃
Loss on drying：≤1.0%
Residue on ignition：≤0.1%
Heavy metal：≤10ppm
Assay：≥99.0%
Total aerobic microbial count：≤10³cfu/g
Total yeast and mold count：≤10²cfu/g
B：In accordance with USP
Appearance：White or off-white crystalline powder
Melting point：104℃-107℃
Loss on drying：≤0.5%
Residue on ignition：≤0.1%
Chloride：≤0.007%
Sulfate：≤0.01%
Assay：98.0%-102.0%
 
Packing size：20Kg/drum
Authentication code: Guo Yao Zhun Zi H37022197
Indications: It is antipyretic, analgesic and anti-inflammatory drug, with antipyretic, analgesic, anti-inflammatory and antirheumatic effects, mainly used in the treatment of rheumatism, rheumatoid arthritis and gout.