Name

Water

Generally safe as used

Description

Water is primarily used as a solvent in cosmetics and personal care products because it dissolves many of the ingredients that impart skin benefits, such as conditioning agents and cleansing agents. Creams and lotions are often emulsions which are combination of water and oils.

Benefits

Water provides hydration to skin in moisturizing products. It can also help dilute surfactants so cleansing formulas are more gentle. Water itself is obviously non-toxic, but formulating with water has some drawbacks. (See risks section)

Considerations

• Skin Dehydration If one is constantly exposed to water, the skin barrier can become compromised. Formulators should take special care to use emollients and humectants to prevent transepidermal water loss. • Requires the use of preservatives When water is present, broad-spectrum preservatives will be needed to keep the formula from growing bacteria, yeast, and other pathogens. A water-containing product without a preservative can grow harmful levels of pathogens within hours. • Requires emulsifiers Moisturizers containing water are often emulsified with synthetic substances that are contaminated with carcinogens. Make sure to read the other ingredients present and figure out which ingredients are emulsifying the product.

Synonyms

Distilled water Dihydrogen oxide Sterile water Water, deionized Purified water Water vapor aqua Water, purified Dihydrogen Monoxide Deionized water DHMO agua acqua dihydridooxygen Wasser Water, purified sterile Water, sterile purified Water purified Aqua Purificata H2O Water, mineral Water, for HPLC Water; Dihydrogen oxide Water, sterile Water, distilled

Research Sources

https://pubchem.ncbi.nlm.nih.gov/compound/962

Summary

Safe ingredient but requires preservation.