We have developed the p-toluenesulfonic acid of electronic garde (EC
grade) which is now on formal production. The assay of the product above
is over 99.9% while the free acid is below 0.05%. The main metal ions（Fe2+、Na+、K+、Ca2+）is
below 1ppm. It is widely used in synthesis of foaming agents and
metal p-toluenesulfonate for electronics.
We will invest additional environmental protection fund of RMB 4,720,900 to improve the provention of three-waste. After the upgrade of the environmental protection facilities, the cost of energy and the emission of three-waste will be both decreased obviously, which will lead us a sustainable development.
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