Specialty Additives Available — Bulk Only

Methyltin Mercaptide (Organotin Stabilizer)

CAS 57583-35-4 · Formula C22H44O4S2Sn · MW 555.4 g/mol

An organotin heat stabilizer that keeps rigid PVC from degrading under high-temperature processing. It protects PVC against thermal degradation during extrusion, calendering, blow molding, and injection molding.

Safety Data Sheet
HS Code
3812.39
At a Glance
Material Family
Specialty Additives
Record Type
Pure compound
Primary Role
Preservation
Functional Roles
Preservation
Industries Served
Plastics & Polymers
Applications & Use Cases
  • ▸ PVC heat stabilizer: Thermal-degradation stabilizer for rigid and flexible PVC.
  • ▸ Extrusion and calendering: Stabilizer for PVC extrusion and calendering.
  • ▸ Molding: Stabilizer for PVC blow molding and injection molding.
Physical Properties
Physical Description
Liquid; Dry Powder
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
3812 . 39
Chapter 38
Miscellaneous chemical products
Heading 38.12
Internationally harmonized (WCO HS)
Subheading 3812.39
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
57583-35-4
Molecular Formula
C22H44O4S2Sn
Molecular Weight
555.4 g/mol
IUPAC Name
2-ethylhexyl 2-[[2-(2-ethylhexoxy)-2-oxoethyl]sulfanyl-dimethylstannyl]sulfanylacetate
PubChem CID
9576130
InChI Key
YAHBZWSDRFSFOO-UHFFFAOYSA-L
Synonyms & Trade Names
2-Ethylhexyl 10-ethyl-4,4-dimethyl-7-oxo-8-oxa-3,5-dithia-4-stannatetradecanoate Methyltin mercaptide Dimethyltin bis(2-ethylhexyl thioglycolate) 583M354 Bis(2-ethylhexyl) 2,2'-((dimethylstannanediyl)bis(sulfanediyl))diacetate Methyl Tin Mercaptide
Full Description

Methyltin mercaptide (CAS 57583-35-4) is an organotin compound used as a heat stabilizer for polyvinyl chloride. It protects PVC against thermal degradation during extrusion, calendering, blow molding, and injection molding.

Frequently Asked Questions

What is methyltin mercaptide?

Methyltin mercaptide (CAS 57583-35-4; C22H44O4S2Sn) is an organotin compound used as a heat stabilizer for polyvinyl chloride (PVC). It protects PVC against thermal degradation during processing.

What is an organotin stabilizer used for?

It is used as a thermal-degradation stabilizer for rigid and flexible PVC during extrusion, calendering, blow molding, and injection molding, helping maintain color and melt stability through processing heat.

What is the HS code for methyltin mercaptide stabilizer?

Methyltin mercaptide PVC stabilizer is classified under HS heading 3812.39 (anti-oxidizing preparations and compound stabilizers for rubber/plastics). Confirm the destination tariff subheading with your broker.

What grades and bulk packaging does RawSource supply?

We supply organotin (methyltin mercaptide) PVC stabilizer in drums, IBC totes, and bulk to PVC processors, with a CoA and SDS on each shipment. Provide your PVC application and volume for a quote.

What is the cost of bulk organotin stabilizer?

Pricing tracks tin content, grade, volume, packaging, and freight. Request a current quote with your required quantity and delivery point and we will return landed pricing.

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Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.

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