INBDE (Integrated National Board Dental Examination) Practice Exam 2026 - Free Practice Questions and Study Guide

Trisodium phosphate is the compound that controls the setting rate of alginate. Trisodium phosphate works as a retarder in alginate materials, slowing down the setting time to allow for adequate mixing and impression-taking. Incorrect options:

- Calcium sulfate is used in gypsum products, not alginate.

- Potassium alginate is the salt form of alginic acid and is not used to control the setting rate of alginate.

- Sodium chloride is commonly known as table salt and is not involved in controlling the setting rate of alginate.