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MSM COA vs Reality: Why Third-Party Testing Matters

April 4, 2026

A Certificate of Analysis (COA) is essential — but not always sufficient.

Some buyers have reported discrepancies between supplier COAs and independent lab results, especially in purity claims.

To mitigate risks, professional buyers now:

• Send samples to SGS, Eurofins, or Intertek

• Compare multiple batch COAs

• Evaluate long-term consistency

Transparency is becoming a key differentiator among MSM suppliers.

Manufacturers willing to support third-party testing and provide historical data, such as Zhuzhou Hansen Chemicals, tend to build stronger trust with international clients.

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