| Not official USP-NF text | ||||
| ISOTRETINOIN | ||||
| PF | LGS# | Brand | Type of Test | Additional Information |
| 10(4) | L3 | LiChrosorb Si 100 | Limit of . . . . . . . . . | Limit of tretinoin; 5-im; manufacturer Merck KGaA. |
| 17(3) | G43 | None Cited | Organic volat. impurities | See Method V  467 |