Standard Operating Procedure for Incorporation of Nanoparticles in Gel Formulations in Gel Manufacturing
| Department | Gel Manufacturing |
|---|---|
| SOP No. | SOP/GM/174/2025 |
| Supersedes | SOP/GM/174/2022 |
| Page No. | Page 1 of 8 |
| Issue Date | 09/06/2025 |
| Effective Date | 11/06/2025 |
| Review Date | 09/06/2027 |
1. Purpose
To establish a standard procedure for the controlled incorporation of nanoparticles into gel formulations during the manufacturing process to ensure uniform distribution and efficacy while maintaining regulatory compliance and product safety.
2. Scope
This SOP applies to the Gel Manufacturing Department and includes all nanoparticle-enhanced formulations intended for topical, transdermal, or cosmetic application in both R&D and commercial batches.
3. Responsibilities
- Production Chemist: Responsible for executing nanoparticle incorporation during manufacturing.
- R&D Scientist: Responsible for providing pre-formulation data and nanoparticle compatibility reports.
- Quality Assurance (QA): Responsible for reviewing protocols, verifying critical process parameters, and
documentation.
Quality Control (QC): Responsible for testing particle size, uniformity, and physical attributes post-manufacture.
4. Accountability
The Head of Manufacturing is accountable for ensuring proper implementation of nanoparticle handling and incorporation procedures as per approved formulation and safety data.
5. Procedure
5.1 Preparation
- Review the formulation development report and determine the type and specifications of nanoparticles (e.g., silver, gold, zinc oxide, titanium dioxide, liposomes).
- Verify the Certificate of Analysis (CoA) of nanoparticles and check for sterility, particle size, and heavy metal limits.
- Ensure proper personal protective equipment (PPE) such as respirators and gloves are used while handling nanoparticles.
5.2 Dispersion of Nanoparticles
- Transfer the required quantity of nanoparticles to a clean, dry dispersion vessel under laminar airflow.
- Use a suitable dispersing agent (e.g., polysorbate 80, glycerol) based on formulation compatibility.
- Utilize ultrasonication or high-shear mixing at defined parameters (RPM and time) to achieve a homogenous nanoparticle dispersion.
- Conduct particle size analysis and ensure results fall within specification (typically <200 nm).
5.3 Incorporation into Gel Base
- Ensure the gel base is prepared and cooled to an acceptable temperature (usually <40°C) to avoid nanoparticle degradation.
- Gradually add the nanoparticle dispersion into the gel base under gentle stirring.
- Use overhead stirrers to ensure even distribution without introducing air bubbles.
- Continue mixing until uniformity is visually confirmed and verified through sampling.
5.4 Sampling and Testing
- Withdraw in-process samples and send to QC for testing:
- Particle size distribution
- Uniformity and dispersion homogeneity
- pH, viscosity, and appearance
- Proceed to packaging only after release from QC and QA.
5.5 Cleaning and Safety
- Follow dedicated cleaning procedures for equipment used with nanoparticles as outlined in SOP/GM/078/2025.
- Dispose of unused or spilled nanoparticles as per hazardous waste guidelines in SOP/EHS/015/2025.
6. Abbreviations
- PPE: Personal Protective Equipment
- R&D: Research and Development
- QA: Quality Assurance
- QC: Quality Control
- CoA: Certificate of Analysis
7. Documents
- Nanoparticle Dispersion Log – Annexure-1
- Particle Size Analysis Report – Annexure-2
- Nanoparticle Handling Record – Annexure-3
8. References
- ICH Q8 – Pharmaceutical Development
- WHO TRS 1025 – Guidelines on Nanotechnology in Pharmaceuticals
- SOP/GM/078/2025 – Equipment Cleaning for Nanoparticle Formulations
- SOP/EHS/015/2025 – Disposal of Hazardous Pharmaceutical Materials
9. SOP Version
Version: 2.0
10. Approval Section
| Prepared By | Checked By | Approved By | |
|---|---|---|---|
| Signature | |||
| Date | |||
| Name | |||
| Designation | Production Chemist | QA Executive | Head – Manufacturing |
| Department | Gel Manufacturing | Quality Assurance | Manufacturing |
11. Annexures
Annexure-1: Nanoparticle Dispersion Log
| Date | Batch No. | Nanoparticle Type | Quantity | Dispersant Used | Operator Signature |
|---|---|---|---|---|---|
Annexure-2: Particle Size Analysis Report
| Date | Batch No. | Sample ID | Mean Particle Size (nm) | Standard Deviation | Performed By |
|---|---|---|---|---|---|
Annexure-3: Nanoparticle Handling Record
| Operator | PPE Used | Material Handled | Quantity | Time | Remarks |
|---|---|---|---|---|---|
Revision History
| Revision Date | Revision No. | Change Description | Reason | Approved By |
|---|---|---|---|---|
| 12/04/2022 | 1.0 | Initial issue | New SOP | QA Head |
| 09/06/2025 | 2.0 | Added new types of nanoparticles and dispersion procedure | Annual review | QA Head |