- Sodium Hydroxide, Calcium Hydroxide, Magnesium Hydroxide and Potassium Hydroxide are white solids which occur in several forms, including powders.
- In cosmetics and personal care products, Sodium, Calcium, Magnesium and Potassium Hydroxide are used in the formulation of bath products, cleansing products, fragrances, foot powders, hair dyes and colors, makeup, nail products, personal cleanliness products, shampoos, shaving products, depilatories, skin care products, and suntan products.
- Sodium and Calcium Hydroxide are also used in hair straighteners and hair wave sets.
- Sodium Hydroxide, Calcium Hydroxide, Magnesium Hydroxide and Potassium Hydroxide are used to control the pH of cosmetics and personal care products. Magnesium Hydroxide is also used as an absorbant.