Ferrous sulfate is a commonly used medicine in people's daily life. It is cheap, effective and widely used. In our daily life, we often need to buy some ferrous sulfate for use. At present, there are sales in major markets and websites. However, we should choose the merchants with guaranteed quality when purchasing, so as to achieve the ideal effect in the later use.

Ferrous sulfate with good quality is divalent ferrous ion, and divalent ferrous ion is also the most effective component in ferrous sulfate. However, divalent ferrous ion has strong oxidation and is easy to be reduced to trivalent iron ion. The poor quality of ferrous sulfate is mainly due to the mistakes in production or preservation, which leads to the deterioration of ferrous sulfate.

So how to distinguish the quality of ferrous sulfate products? After understanding the relevant chemical knowledge, sodium hydroxide can be used to identify. Ferrous sulfate and sodium hydroxide are mixed to form ferrous hydroxide precipitation, which is generally green. However, if ferrous sulfate deteriorates, it will produce dark reddish brown precipitate after sodium hydroxide combination.

Therefore, when you buy Ferrous sulfate, you can simply identify the quality, in order to achieve the ideal effect in the follow-up use.