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3,3'-Thiodipropionic acid (TDPA)

Grade Food Grade/Feed Grade/Cosmetic Grade/Tech Grade
Structure Formula
Formula C6H10O4S
CAS No. 111-17-1
EC No. 203-841-3
Molecular Weight 178.21
Synonyms 3,3'-Thiodipropionic acid; 3,3'-sulfanediyldipropanoic acid; 3,3'-sulfanediyldipropanoate; TDPA; 3,3'-thiodipropionate;


3,3 ‘-thiodipropionic acid, also known as TDPA, is a thiocompound with the formula C6H10O4S2, which has two carboxyl groups in its molecular structure. The compound is characterized by a key ethylene (propionic acid) chain that connects two carboxylic acid groups at the third carbon position and a sulfur atom that connects two carbon atoms.


3,3 ‘-thiodipropionic acid is widely used in various industries as an antioxidant, stabilizer, and intermediate. Antioxidants act as protection for fats and oils in food from spoilage. Prevent the degradation of polymers such as ethylene and propylene in the production of plastics and polymers; Its chelation function prevents scaling and corrosion by binding with metal ions in industrial water systems during treatment. In addition, its dispersion ability allows the particles to be suspended in different mixtures, improving their performance.


Features and Application


Cosmetic Grade 3,3′-Thiodipropionic Acid: Serves as a crucial antioxidant in the personal care industry, finding application in facial cleansers, beauty creams, shampoos, toothpaste, shower gels, facial masks, and soaps. In these formulations, it reacts with peroxides, converting them into stable non-free radical products. This process prevents the rancidity, fading, and loss of activity in cosmetic oils, ensuring the longevity and effectiveness of the products. Additionally, TDPA exerts an inhibitory effect on free radicals produced in the skin, contributing to the overall antioxidant protection;


Industrial Grade 3,3′-Thiodipropionic Acid: Utilized as an intermediate for the production of thioester antioxidants, including Dilauryl Thiodipropionate (DLTP), Dioctadecanthiodipropionate Ester (DSTP), and Ditetradecane Thiodipropionate (DMTP). These antioxidants play a pivotal role in enhancing the stability and performance of various industrial products;


Intermediate of Synthesis: 3,3′-thiodipropionate serves as a versatile intermediate in the synthesis of pharmaceuticals, including thiodipropionic acid amide—an essential building block in the production of penicillin, cephalosporins, and amino acids. Its application extends to the synthesis of anticancer medications, highlighting its significance in medicinal chemistry;


Food Grade 3,3′-Thiodipropionic Acid: Serves as a reliable antioxidant in dairy products, meat items, baked goods, flour-based foods, beverages, candies, condiments, and more, contributing to the preservation of flavor and quality;


Industrial Grade 3,3′-Thiodipropionate: 3,3′-thiodipropionate plays a crucial role in the production of antioxidants for polypropylene and environmentally friendly rubber, functioning as a raw material in these processes. Additionally, it serves as a heat stabilizer for polyoxyethylene ether, contributing to the stability of this compound under various conditions;


Heat Stabilizer: TDPA is also utilized as a heat stabilizer for polyoxyethylene ether, showcasing its broad spectrum of industrial application;


Find more resources for your industry: Antioxidant DLTDP

Health & Safety

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