DF100A NPB Cleaner

4. Evaporation speed

Table 4. Evaporation speed comparison

5. Thermal stability

Thermal stability data is very important for assessment of a solvent's safety, particularly as regards the toxicology of thermal decomposition products.
Generally thermal stability is tested by the following two methods:
1. ARC method (Accelerating Rate Calorimetry) which determines the decomposition temperature by measuring heat liberation. NPB with or without stabilizer decomposes at above 226.5°C. Bromomethane, benzene and other compounds are found by GC/MS analysis in the decomposition products, but no bromine or hydrogen bromide or other highly toxic compounds are detected (see table below). Stabilizer has no significant influence on the decomposition products of NPB.
2.  Direct GC/MS analysis of the vapor of NPB heated by nichrome resistant coil in the open air. Some oxidized compounds are found by this method.
The table below shows the thermal decomposition products of NPB by the above two tests.

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