Question:
Methylene blue test is used in quality control testing of containers and closures mainly for
Methylene blue test is used in quality control testing of containers and closures mainly for
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Blue dye inside = Broken seal (Leak).
Updated On: May 15, 2026
- Clarity test
- Self-sealability
- Leak test container closure integrity
- Hydrolytic resistance
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The Correct Option is C
Solution and Explanation
Step 1: Concept
Ensuring that a container is hermetically sealed is vital for maintaining the sterility and stability of pharmaceutical products.
Step 2: Meaning
A leak test identifies physical gaps between the container and its closure.
Step 3: Analysis
In the dye-immersion test, containers are submerged in a methylene blue dye solution under vacuum. If the seal is imperfect, the dye is drawn into the container, turning the contents blue.
Step 4: Conclusion
Methylene blue is the standard dye for leak testing and container closure integrity. Final Answer: (C)
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