The thermal stability of the substance is affected

2010-11-13View Original

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When evaluating the thermal stability of a substance, attention is mainly paid to the effect of temperature on it; the MSDS will indicate the decomposition temperature of the substance. However, in reality, the thermal stability of materials is also affected by certain trace substances; for example, maleic anhydride is listed as a stable substance in its MSDS. Yet during the distillation of maleic anhydride, if the concentration of potassium and sodium ions reaches 20–30 ppm, it begins to decompose at around 180°C, posing a risk of explosion (several accidents have occurred in China). We often can only determine the hazards of a substance based on the MSDS; such hazards are difficult to recognize unless one is an expert in the field! Could everyone list the similar hazards of other substances?

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The thermal stability of the substance is affected

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