Accelerated Degradation Experiment
Conditions
Procedure A: |
30 days exposure at 50 °C and 100% relative humidity. |
Procedure B: |
30 days exposure at 50 °C and 100% relative humidity followed by 7 days at 70 °C and a 100% relative humidity. |
Appearance of the substance
The substance, originally in the form of a white to slighty yellow, granular powder or white or almost white, opaque, fused masses or sticks, changes after procedures A and B into a colourless to very light yellow liquid.
Gain of moisture
Colorimetric determination
Diazo-reaction between solution of the test substance and sulfanilic acid, followed by coupling with 1-naphthylamine; absorbance measured at 520 nm.
After procedure A: |
no degradation |
After procedure B: |
25% degraded |
Conclusion
Sodium nitrite is subject to decomposition under accelerated degradation conditions.
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