Aluminium Chlorohydrate

Aluminium chlorohydrate (ACH) is a type of inorganic salt that is commonly used as an antiperspirant and coagulant in water treatment processes. It is a white or yellowish powder that is soluble in water, and it has the chemical formula AlnCl(3n-m)(OH)m. The value of "n" and "m" depends on the degree of polymerization.

When ACH is applied topically as an antiperspirant, it works by plugging sweat glands, thereby reducing the amount of sweat produced. This helps to prevent body odor and wetness. ACH is often preferred over other types of antiperspirants because it is less irritating to the skin and does not leave white residue on clothing.

In water treatment, ACH is used as a coagulant to remove suspended particles and impurities from water. When added to water, ACH forms a positively charged hydroxide ion, which attracts negatively charged particles like dirt, bacteria, and algae. These particles then clump together and settle to the bottom of the water source, where they can be easily removed.

ACH is considered safe for use in both personal care products and water treatment processes. However, there have been some concerns about its potential link to breast cancer and Alzheimer's disease. While these claims have not been conclusively proven, some studies have suggested a possible correlation, and further research is needed to fully understand the risks and benefits of using ACH.