DEIONISED WATER
INCI: Aqua
What is Aqua or Water?
Water is probably, the most important ingredient in skin care, and it is mainly used as a solvent. Deionized or demineralized water is standard water with much less content in other substance like salts. There are several reasons why tap water or normal water are not ideal when making cosmetics and skin care preparations.
|
Type of water |
Method |
Contents |
Suitability for use in cosmetics |
|
Tap water |
Filtration and treatment at the primary basis |
Very slightly impure, impurities like metal and other ions |
not suitable as ions may interact with other ions and may create salts or soaps. |
|
Distilled water |
Water is boiled, vapors are condensed to get distilled water |
Some impurities boiled at a temperature lower than boiling water temperature can still remain, for example, alcohol, carbon dioxide from the air can also get incorporated in water. |
Not suitable as it may alter physical characteristics. |
|
Deionized or demineralized water |
Water purified by RO or NANO purification |
Ions like calcium, magnesium, iron or copper are removed |
Yes, suitable as no interacting ions present |
|
Purified water |
It can be either distilled or deionized |
Ions and metal removed |
Overly pure for a cosmetic product |
Use & Benefits:
Water or Aqua is the primary solvent in most of the formulations. It not only dissolves but also distributes the water-soluble active ingredient uniformly in a product. It is naturally available in abundance.
Referenceshttps://books.google.co.in/books?id=rKHSBQAAQBAJ&pg=PA270&dq=deionised+or+demineralized+water++use+in+cosmetics&hl=en&sa=X&ved=0ahUKEwio5L_fqLLiAhUBiHAKHQlVDv8Q6AEIKDAA#v=onepage&q=deionised%20or%20demineralized%20water%20%20use%20in%20cosmetics&f=false
