Not official USP-NF text
PHENYLBUTAZONE
PF LGS# Brand Type of Test Additional Information
13(2) L2 Bondapak C18/Corasil Assay Pre-column
13(2) L7 Partisil CCS/C8 Assay Analytical column.
17(3) G43 None Cited Organic volat. impurities See Method V 467