SOP Guide for Pharma

API Manufacturing: SOP for Sampling of Viscous and Sticky Materials – V 2.0

API Manufacturing: SOP for Sampling of Viscous and Sticky Materials – V 2.0

Standard Operating Procedure for Sampling of Viscous and Sticky Materials in API Manufacturing

Department API Manufacturing
SOP No. SOP/API/107/2025
Supersedes SOP/API/107/2022
Page No. Page 1 of 10
Issue Date 13/04/2025
Effective Date 15/04/2025
Review Date 13/04/2026

1. Purpose

To define a systematic procedure for the correct sampling of viscous and sticky materials in API manufacturing, ensuring representative samples are collected safely and accurately for IPC and quality testing.

2. Scope

This SOP applies to all stages of manufacturing where materials such as heavy syrups, thick pastes, gums, and tar-like residues require sampling during processing or

after isolation.

3. Responsibilities

  • Production Chemist: Ensure availability of clean, suitable sampling tools and containers.
  • QC Analyst: Provide guidance on sample quantity and labeling requirements.
  • QA Officer: Review sampling records and ensure compliance with sampling plan.

4. Accountability

The Production Head is accountable for ensuring samples are collected safely and in a representative manner. The QA Head is responsible for overall procedural compliance.

5. Procedure

5.1 Preparation for Sampling

  1. Verify sampling requirement from the BMR or sampling plan.
  2. Use tools such as:
    • PTFE or SS spatulas
    • Viscous material samplers (rod samplers or syringes with wide bore)
    • Pre-labeled HDPE or glass containers with wide mouths
  3. Wear appropriate PPE: gloves, goggles, apron.
  4. Ensure tools and containers are dry, clean, and inert to the material sampled.

5.2 Sampling Method

  1. Stir the material if possible to obtain a uniform consistency before sampling.
  2. Collect sample from at least three locations if material volume permits:
    • Top
    • Middle
    • Bottom
  3. If the material is in a drum or wide vessel, insert rod sampler or scoop diagonally to capture layered sample.
  4. For very sticky substances, lubricate sampler with small quantity of the same material to ease collection.
  5. Transfer sample into labeled container using a spatula or low-friction scraper.
  6. Seal the container immediately to avoid material sticking to lid threads.

5.3 Sample Labeling

  1. Use IPC Sample Label (Annexure-1) indicating:
    • Sample Code
    • Batch Number
    • Date & Time of Sampling
    • Stage
    • Sampler Name
  2. Attach label securely. Do not apply directly to wet or sticky surfaces.

5.4 Cleaning of Equipment

  1. Clean sampling tools immediately using suitable solvent (e.g., IPA) or warm water if water-soluble.
  2. Dry and inspect for residual material before next use.

5.5 Documentation

  1. Record sampling in the IPC Sampling Logbook (Annexure-2) including:
    • Date and Time
    • Material Name and Batch No.
    • Quantity Sampled
    • Tool Used
    • Remarks
  2. QC shall acknowledge receipt of sample and initiate testing within defined timeframe.

6. Abbreviations

  • SOP: Standard Operating Procedure
  • IPC: In-Process Control
  • QC: Quality Control
  • QA: Quality Assurance
  • PPE: Personal Protective Equipment

7. Documents

  1. IPC Sample Label (Annexure-1)
  2. IPC Sampling Logbook (Annexure-2)

8. References

  • ICH Q7 – GMP for APIs
  • 21 CFR Part 211 – US FDA GMP
  • WHO TRS 986 – GMP Guidelines

9. SOP Version

Version: 2.0

10. Approval Section

Prepared By Checked By Approved By
Signature
Date
Name
Designation
Department

11. Annexures

Annexure-1: IPC Sample Label

Sample Code
Batch No.
Material
Date & Time
Stage
Sampler Name

Annexure-2: IPC Sampling Logbook

Date Batch No. Material Sample Qty Tool Used Sampler Remarks
13/04/2025 API-20250413 Sticky Intermediate A 20 g SS Rod Sampler Ravi Kumar Uniform Sample

Revision History:

Revision Date Revision No. Details Reason Approved By
01/01/2022 1.0 Initial SOP Release GMP Compliance QA Head
13/04/2025 2.0 Added multi-point sampling method and improved cleaning instruction Audit Update QA Head
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