Piroxicam Impurity B
[CAS# 65897-46-3]

Identification

• Name: Piroxicam Impurity B
• Synonyms: 4-Hydroxy-N-2-pyridinyl-2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide
• Molecular Formula: C₁₄H₁₁N₃O₄S
• Molecular Weight: 317.32
• CAS Registry Number: 65897-46-3
• EC Number: 641-752-5

Properties

• Solubility: Very slightly soluble (0.54 g/L) (25 ºC), Calc.^*
• Density: 1.611±0.06 g/cm³ (20 ºC 760 Torr), Calc.^*
• Melting point: 224 ºC (decomp)^**

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2014 ACD/Labs)

^** Lombardino, Joseph G.; Organic Preparations and Procedures International 1980, V12(5), P269-74.