Standard Operating Procedure for Monitoring Homogenization Efficiency in Gel Manufacturing
| Department | Gel Manufacturing |
|---|---|
| SOP No. | SOP/GM/072/2025 |
| Supersedes | SOP/GM/072/2022 |
| Page No. | Page 1 of 10 |
| Issue Date | 02/06/2025 |
| Effective Date | 04/06/2025 |
| Review Date | 02/06/2026 |
1. Purpose
This SOP outlines the procedure for monitoring the efficiency of homogenization in gel formulations to ensure consistent product quality, optimal dispersion of active ingredients, and homogeneity of final gels.
2. Scope
This procedure applies to all batches of gels manufactured in the Gel Manufacturing Department using high-shear homogenizers
or inline homogenization equipment.
3. Responsibilities
- Production Officer: Ensures the homogenization parameters are followed and sampling is done at appropriate intervals.
- Quality Control Analyst: Performs tests to assess homogenization efficiency (microscopic evaluation, viscosity, content uniformity).
- Quality Assurance Executive: Reviews and verifies documentation and compliance with procedure.
4. Accountability
Manufacturing Head is accountable for the implementation and compliance of this SOP.
5. Procedure
5.1 Pre-Homogenization Check
- Ensure the batch is mixed for the required pre-homogenization period.
- Confirm raw material dispersion and viscosity using in-process checks.
- Ensure no clumps or undissolved materials are visible before initiating homogenization.
5.2 Homogenization Parameters
- Set RPM, duration, and pressure (if using inline homogenizer) as per BMR.
- Record all critical parameters in Homogenization Log Sheet (Annexure-1).
5.3 Sampling and Testing
- Collect pre-homogenization and post-homogenization samples.
- Conduct microscopic analysis to evaluate particle size reduction.
- Check viscosity at different shear rates using a viscometer.
- Test content uniformity at multiple locations within the batch.
5.4 Evaluation Criteria
- Post-homogenization sample must show reduction in particle aggregates.
- Viscosity profile should be within specification as defined in Master Formula Record (MFR).
- Uniformity of API concentration should meet ±5% variation limit.
5.5 In-Process Adjustments
- If results are unsatisfactory:
- Repeat homogenization cycle.
- Adjust homogenization speed or time as per QA approval.
5.6 Documentation
- Record homogenization details in the logbook.
- Attach microscopic photos or results to the batch record (if applicable).
- Maintain QA deviation report in case of reprocessing (Annexure-2).
6. Abbreviations
- API: Active Pharmaceutical Ingredient
- MFR: Master Formula Record
- QA: Quality Assurance
- RPM: Rotations per minute
7. Documents
- Homogenization Efficiency Log Sheet – Annexure-1
- Deviation Report Form – Annexure-2
8. References
- ICH Q8 (R2) – Pharmaceutical Development
- WHO Guidelines on Good Manufacturing Practices for Pharmaceutical Products
9. SOP Version
Version: 2.0
10. Approval Section
| Prepared By | Checked By | Approved By | |
|---|---|---|---|
| Signature | |||
| Date | |||
| Name | |||
| Designation | Jr. Production Chemist | QA Executive | Head – Manufacturing |
| Department | Gel Manufacturing | Quality Assurance | Manufacturing |
11. Annexures
Annexure-1: Homogenization Efficiency Log Sheet
| Date | Batch No. | RPM | Duration | Viscosity (cP) | Microscopic Analysis Result | Operator |
|---|---|---|---|---|---|---|
Annexure-2: Deviation Report Form
| Deviation Type: | |
| Date & Batch No.: | |
| Description: | |
| Investigation Summary: | |
| Corrective Action: | |
| Preventive Action: | |
| QA Reviewed By: |
Revision History
| Revision Date | Revision No. | Change Description | Reason | Approved By |
|---|---|---|---|---|
| 31/05/2022 | 1.0 | Initial issue | Procedure Release | QA Manager |
| 02/06/2025 | 2.0 | Updated homogenization efficiency parameters and log sheet | Process Improvement | QA Manager |