Analysis of the reasons for the yellowing of industrial aluminum sulfate

Industrial aluminum sulfate is actually a commonly used solid chemical product in industrial preparation. In the fuel industry, aluminum sulfate serves as a precipitant in the production of chrome yellow and lake dyes, while also serving as a fixing and filling agent. It is not difficult to observe carefully that ferrous and its aqueous solution exposed to the air are more prone to yellowing.
1. Its molecular formula changes from divalent iron to trivalent iron, and the color also changes from blue or green to yellow or brown.
2. This is because green alum is exposed and weathered in the air, and the ferrous ions in industrial aluminum sulfate are easily oxidized into iron sulfate by oxygen or other substances in the air after coming into contact with the air.
3. The oxidized aluminum sulfate used for watering plants does not have any impact, but its effect is far inferior to before it spoils.
Especially in humid and ventilated environments, the oxidation rate of industrial aluminum sulfate will be faster, making it more prone to yellowing.