Or the sulphate, or the gloom of the smear, and smear, as it burns on the cloth or body of man or wood and similar substances. It produces heat when dissolved in water. This acid, which is found in nature in sulfate and is very consumed in medicine and the industry, was first obtained by Iranian chemist Jabraben Hanyan from the heat of the green, but now they are preparing a variety of bonds. A variety of iron sulfates and a number of acids are produced from this acid, called the mother of acids because it is simple and inexpensive to be consumed in most chemical industries. It is also used in fiber color, but in its use it must be fully respected because otherwise it will be disrupted according to the acid power it has.