Description

Calcium 3,3'-Thiobispropionate is a calcium salt derivative of the antioxidant thiodipropionic acid, known for its role as a stabilizer and secondary antioxidant in polymer systems. This compound is valued for its ability to effectively scavenge free radicals and decompose hydroperoxides, thereby enhancing the thermal and oxidative stability of various materials. It is primarily sought by manufacturers in the plastics, synthetic fiber, and lubricant industries to extend product lifespan and maintain performance under demanding conditions.

Application

The primary function of Calcium 3,3'-Thiobispropionate is as a synergistic antioxidant and metal deactivator. Its key applications include:

• Polymer Stabilization: Used as a secondary antioxidant in polyolefins (e.g., PP, PE) and other polymers to prevent thermal and oxidative degradation during processing and end-use.
• Synthetic Fibers: Incorporated into nylon, polyester, and polypropylene fibers to protect against UV and thermal-induced strength loss.
• Lubricants and Greases: Acts as an antioxidant additive in industrial lubricants and synthetic greases to inhibit oxidation and sludge formation.
• Adhesives and Sealants: Enhances the long-term stability and performance of hot-melt and reactive adhesive formulations.
• Food Contact Materials: Employed in compliant polymer formulations for packaging where regulatory-approved stabilization is required.
• Rubber Products: Used in certain synthetic rubber compounds to improve aging resistance.

Basic Information

Product Name	Calcium 3,3'-Thiobispropionate
CAS No.	67151-67-1
Molecular Formula	C12H18CaO8S2
Molecular Weight	394.47 g/mol
Synonyms	Calcium Thiodipropionate; Calcium Bis(3-carboxyethyl) Sulfide; Calcium 3,3'-Dithiodipropionate; Calcium Salt of 3,3'-Thiodipropionic Acid; Antioxidant 412S; DSTDP-Ca; Thiodipropionic Acid Calcium Salt; Calcium β,β'-Thiodipropionate
EINECS	266-567-6

Quality Control

Our production of Calcium 3,3'-Thiobispropionate adheres to a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, moisture content, and heavy metals are available for every shipment. We are committed to supplying material that meets the consistent quality standards required for industrial and specialty chemical applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (Titration)	≥ 98.0 %
Loss on Drying	≤ 2.0 %
Calcium Content	9.5 - 10.5 %
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Slightly soluble

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.