Trisodium phosphate added to alginate contributes towards_______________?

Correct answer: A. increasing the working time of alginate impression material

A. increasing the working time of alginate impression material
B. Acts as an accelerator
C. Initiating the setting reaction
D. Provides gel strength

Explanation

Trisodium phosphate reacts preferentially with calcium ions and delays formation of the alginate gel, thereby increasing working time. It is a retarder, not an accelerator or gel-strengthening agent.

Submitted by a TestUstad contributor and published by the TestUstad editorial teamLast updated 18 September 2026

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