The most popular form of alginate is in powdered form. The paste form has shorter gelation time.  When mixed powdered alginate with water at around 1:1: the mixture becomes a gel, that is set to a rubber-like material. The working time is varied and can be controlled by the manufacturers or the dentist. It is non-toxic and non-irritant material.

Alginate is used for taking impression (imprint) of the dental arches for orthodontic model, bleaching trays, mouth guards, and study models. 

Alginate powder contains: 

  1. Sodium alginate
  2. Calcium sulfate
  3. Trisodium phosphate
  4. Diatomaceous earth
  5. Zinc oxide
  6. Potassium titanium fluoride

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