Available in acids and bases. They vary in both type of chemical compound and weight content in the original solution. The caustic soda is available in concentrations of 25, 33, 50% and the hydrochloric acid in concentrations of 31-33%.
- As a pH regulator in liquid systems.
- As an acidity regulator in food.
It is necessary to use personal protective equipment throughout their use to avoid burns, swallowing, difficulty in breathing and eye contact.