Description

4,4'-Thiobisbutyric Acid Dioctadecyl Ester is a high-molecular-weight organosulfur compound valued for its role as a versatile intermediate and functional additive. Its chemical structure, featuring a central thioether linkage flanked by long aliphatic chains, imparts unique properties such as thermal stability and compatibility with polymeric systems. This product is essential for manufacturers in the polymer, lubricant, and specialty chemical industries seeking to modify material characteristics or synthesize complex molecules.

Application

• Polymer Additive: Acts as a secondary antioxidant, plasticizer, or internal lubricant in polyolefins (e.g., polyethylene, polypropylene) and PVC formulations to enhance processing stability and material flexibility.
• Lubricant & Grease Formulation: Serves as a high-performance thickening agent or extreme pressure (EP) additive in synthetic lubricants and industrial greases, improving wear resistance and load-carrying capacity.
• Chemical Intermediate: Utilized in the synthesis of more complex surfactants, corrosion inhibitors, and specialty esters where its long hydrocarbon chains and sulfur center provide specific functionality.
• Cosmetic & Personal Care: Employed as an emollient or viscosity modifier in high-end cosmetic formulations, such as creams and lotions, due to its non-greasy feel and skin compatibility.
• Adhesive & Sealant Systems: Incorporated to improve the flexibility, adhesion, and long-term aging resistance of hot-melt adhesives and elastomeric sealants.
• Fuel & Oil Additive: Functions as a detergent or dispersant additive in fuel and engine oil formulations to prevent deposit formation and maintain engine cleanliness.

Basic Information

Product Name	4,4'-Thiobisbutyric Acid Dioctadecyl Ester
CAS No.	3895-83-8
Molecular Formula	C44H86O4S
Molecular Weight	711.22 g/mol
Synonyms	Dioctadecyl 4,4'-Thiobis(butyrate); Distearyl 4,4'-Thiodibutyrate; 4,4'-Thiodibutyric Acid Dioctadecyl Ester; Thiodibutyric Acid Distearyl Ester; Bis(4-carboxybutyl) Sulfide Dioctadecyl Ester; Stearyl Thiodipropionate Analog (C4); Antioxidant 1035 (related); Lankromark DSTDP (related trade name)
EINECS	223-449-7

Quality Control

Our production of 4,4'-Thiobisbutyric Acid Dioctadecyl Ester adheres to a strict quality management system to ensure batch-to-batch consistency and reliability. Each lot is analyzed against comprehensive specifications, including identity confirmation, purity assay, and critical impurity profiles. Certificates of Analysis (COA) documenting all test results are provided with every shipment. We support compliance with global regulatory frameworks, including REACH, and can tailor specifications to meet specific customer or application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This material is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve product integrity. Keep away from strong oxidizing agents and heat sources.

Specification

Item	Specification
Appearance	White to off-white waxy solid or flakes
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	55 - 65 °C
Acid Value	≤ 1.0 mg KOH/g
Sulfur Content	4.3 - 4.7 %
Heavy Metals (as Pb)	≤ 10 ppm
Loss on Drying	≤ 0.5 %

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