Iron(III) tartrate is a specialty chemical primarily used in analytical chemistry as a reagent for the detection and quantification of substances, particularly phosphates in environmental and water quality samples. It serves as a catalyst or intermediate in organic synthesis reactions. In the medical field, it is used for iron supplementation in cases of deficiency, though less commonly than other iron salts. Additionally, it acts as a mordant in textile dyeing to enhance colorfastness. While it may appear in some nutritional formulations, its role in food additives is limited and not primarily for stability enhancement.