What is a Category 1 CSP under USP 797 and what BUD applies?
Category 1 CSPs are compounded under the least controlled environmental conditions described in USP 797. When Category 1 requirements are met, Category 1 CSPs are assigned a BUD of ≤12 hours at controlled room temperature (20°–25°C) or ≤24 hours refrigerated (2°–8°C), unless a shorter physical or chemical stability limit applies. Category 2 CSPs use a different environmental framework; BUDs for Category 2 must be established in accordance with Table 13 in the chapter (confirm in your licensed text).
A Category 1 BUD error is a patient-safety and inspection problem on the same label. Get the educational ≤12-hour room-temp / ≤24-hour refrigerated pattern straight — then confirm against your licensed USP tables and your room configuration.
How Category 1 and Category 2 differ
Educational anchors: USP 797 category framework (least-controlled environment pattern) and the Category 1 BUD limits in your licensed chapter tables — confirm official text before labeling.
Category 2 CSPs use a different environmental framework; BUDs for Category 2 must be established in accordance with Table 13 in the chapter (confirm in your licensed text).
Not legal advice. Not an inspection-outcome guarantee. Always use your licensed USP 797 text, facility SOPs, and stability data.
- Confirm which CSPs you treat as Category 1 vs 2 vs 3 in SOPs.
- Match labeling and BUD assignment to the correct table and storage condition.
- Keep compounding room configuration current in Compounding AI Pro so answers match your PEC/SCA setup.
- Check state sterile-class rules that may constrain where Category work occurs.
State boards can add overlays
USP is the national pattern many boards reference. Boards may still add facility-class or documentation rules. Illustrative: Texas 22 TAC §291.133; California compounding documentation expectations under CCR 1735 (verify current board text). Verify locally.
This page does not claim full automated state-board overlays as a shipped product surface.
FAQ
- Is Category 1 the same as a Segregated Compounding Area only?
- Category 1 is defined by the least controlled environmental conditions allowed for that category. Confirm the full environmental and process requirements in your licensed chapter, not a single room nickname.
- Can I assign a longer BUD if my product is stable?
- Category maximums still apply when you are in that category framework; stability can only shorten, not extend beyond chapter limits for the category path you use. Confirm tables in licensed text.
- Where do Category 2 BUDs live?
- Table 13 pattern per chapter; confirm licensed USP 797.
- How do Category 2 CSP BUDs differ?
- Category 2 uses a different environmental framework; BUDs must be established in accordance with Table 13 in USP 797. Confirm your licensed chapter tables.
Related
Educational information only. Not legal advice. Not an inspection-outcome guarantee. Keep a current USP Compendium subscription. PIC judgment and your board still govern.