What Is DSTDP? 용도, CAS Number and Supplier Guide
What Is DSTDP?
DSTDP (Distearyl thiodipropionate, CAS 693-36-7) is a sulfur-based secondary antioxidant used extensively in polyolefin plastics to extend thermal stability and service life. It is one of the most widely specified thioester antioxidants globally.
Chemical Identity
- Chemical name: Distearyl 3,3′-thiodipropionate
- CAS 번호: 693-36-7
- Molecular weight: 683.2 g/mol
- 모습: White waxy solid or powder
- 녹는 점: 64–67°C
- Commercial equivalents: Irganox PS 802, Cyanox STDP
How DSTDP Works
The sulfur atom in the thioether linkage acts as a hydroperoxide decomposer. During polymer processing, hydroperoxides form as intermediates in the oxidative degradation chain. DSTDP reduces these to stable alcohols, breaking the chain before further degradation occurs.
Primary Applications
- Polypropylene (PP) fiber, film, and compounds
- Polyethylene pipe and geomembranes
- Automotive PP compounds
- Cable jacketing and insulation
Typical use: 항산화제와 결합 1010 또는 1076 at 0.1–0.3% combined loading.
Purchasing Information
- Standard purity: ≥99.0% (HPLC)
- 포장: 25 kg kraft bags or fiber drums
- MOQ: 100 kg–1 MT (export agent); 1–5 MT (direct factory)
- Lead time: 7–15 business days production + sea freight
- 유통기한: 2 years in sealed, cool, dry storage
자주하는 질문
What is the CAS number for DSTDP?
CAS 693-36-7. Synonym: Distearyl 3,3′-thiodipropionate.
DSTDP와 DLTDP의 차이점은 무엇입니까?
DSTDP has C18 chains (MW 683); DLTDP has C12 chains (MW 515). DSTDP has lower volatility and performs better at higher processing temperatures.
Is DSTDP approved for food contact?
예, listed in FDA 21 CFR §178.2010 and EU 10/2011. Application-specific conditions apply — request a compliance letter from your supplier.
Contact SUNCHEM
SUNCHEM supplies DSTDP with full documentation (COA, SDS, TDS) and export support. 저희에게 연락하십시오 for pricing, 샘플, or technical questions.