Distearyl thiodipropionate

Distearyl thiodipropionate (CAS 115863-90-6), also designated E390, is a thioester-based secondary antioxidant used to protect polymers, lubricants, and fatty materials from oxidative degradation.

Where is Distearyl thiodipropionate used?

• Plastics and polymer processing: compounded alongside primary antioxidants
• With hindered phenolics: synergistic long-term thermal stabilization in polyolefins, PVC, and engineering resins
• Lubricants: retards oxidative thickening and deposit formation
• Industrial oils and greases exposed to elevated operating temperatures
• Food-contact and packaging: E390 approval supports use as an antioxidant in fats, oils, and wax coatings
• Personal care: stabilizes emollient-rich formulations and wax-based products against rancidity during shelf life
• It functions by decomposing hydroperoxides before they can initiate chain-breaking reactions.

Good to know: Regulatory compliance is a key sourcing requirement for food-contact and packaging applications.

Commercial specifications

• Food-grade material conforming to E390 specifications
• Packaging: 25 kg bags to bulk quantities