Sodium Alginate

**Semantic type:** Biomedical or Dental Material|Organic Chemical|Pharmacologic Substance

**Definition:** The sodium salt form of alginic acid and gum mainly extracted from the cell walls of brown algae, with chelating activity. Upon oral administration, sodium alginate binds to and blocks the intestinal absorption of various radioactive isotopes, such as radium Ra 226 (Ra-226) and strontium Sr 90 (Sr-90).

**Synonyms:** - Alginic Acid, Sodium Salt - SODIUM ALGINATE