Not official USP-NF text
TRETINOIN GEL
PF LGS# Brand Type of Test Additional Information
18(2) L1 Nova-Pak C18 Assay 4-µm, 15-cm, manuf. Waters.
34(6) L1 Hypersil BDS C-18 Assay 4.6 mm x 15 cm, 5 µm.
18(5) L1 Nova-Pak C18 Identity Manuf. Waters.