Frontier Natural Products - Cream of Tartar Powder - 1 lb. (453 g) Frontier Natural Products Cream of Tartar Powder contains non-irradiated cream of tartar powder. Cream of tartar powder (potassium hydrogen tartrate) or tartaric acid, is an effervescent acid obtained as a by-product of wine making. The acidic powder is used for culinary and other household purposes, among them: stabilizing egg whites and increasing their heat tolerance; preventing sugar syrups from crystallizing; reducing discoloration of boiled vegetables. Cream of tartar is widely distributed by nature in many fruits, but is usually obtained as a by-product of wine making. During the fermentation of the grapes, tartar crystallizes in the wine casks. The crystals are collected and purified to produce the white, odorless, acidic powder. FoodsFrontier's wide selection of baking and cooking ingredients, great-tasting and convenient food and seasoning mixes make it easy to bring the quality of natural and organic ingredients to your everyday. All-natural meals, made easy.In addition to Frontier's large selection of all-natural and organic baking and cooking ingredients, they also offer many great tasting and convenient food and seasoning mixes. Quality you can count on.Using Frontier's in-house and independent labs, they perform rigorous tests on every product they offer to ensure the best flavor, color, aroma, moisture, and violate oil content. Frontier processes their products naturally, without the use of radiation or ETO chemical sterilization. You can trust Frontier products to be the freshest, purest and most sustainably produced. Simply put, quality effects taste and efficacy. Frontier Natural Products never produces or markets products that make empty claims or contain questionable ingredients. Once herbs and spices arrive at Frontier, every aspect of their handling is done with quality in mind. Taste That Makes A Difference.