Methyltin Mercaptide (Methyl Tin Stabilizer) for High-Performance PVC Processing

Product Overview

Methyltin Mercaptide, also widely known as Methyl Tin Stabilizer, is a premium organotin thermal stabilizer formulated specifically for high-demand PVC processing scenarios. As one of the most efficient thermal stabilizers for rigid PVC, it delivers exceptional performance in suppressing dehydrochlorination, preventing polymer chain degradation, and maintaining long-term processing stability even under continuous high-temperature production conditions.

WSD CHEMICAL Methyltin Mercaptide series is designed to meet the strict requirements of transparent PVC products, food-contact PVC materials, medical-grade PVC applications and high-speed rigid PVC processing lines. Our products feature a carefully balanced composition of monomethyltin and dimethyltin components, ensuring both excellent early-stage color retention and outstanding long-term thermal stability. As a trusted high-performance additive, WSD CHEMICAL Methyltin Mercaptide enables PVC manufacturers to produce crystal-clear finished products without whitening or yellowing issues, while meeting global regulatory standards for food and drinking water contact applications.

Key Features and Benefits

‌Industry-Leading Thermal Stability‌
WSD CHEMICAL Methyltin Mercaptide provides unmatched thermal protection for PVC during processing. It rapidly captures hydrogen chloride released from decomposing PVC chains, effectively blocks the autocatalytic degradation reaction, and maintains consistent processing stability even under extended high-temperature extrusion, injection or calendering cycles.

‌Crystal-Clear Transparency Performance‌
Our Methyltin Mercaptide products deliver superior clarity that no other conventional PVC stabilizer can match. Formulations using WSD CHEMICAL Methyltin Mercaptide produce glass-clear, highly transparent PVC products with no haze, no crystallization spots and no whitening phenomenon, making them ideal for premium transparent packaging and rigid PVC containers.

‌Food and Drinking Water Contact Compliance‌
WSD CHEMICAL Methyltin Mercaptide meets major international regulatory standards including US FDA 21 CFR 178.2010 and German BGA requirements. It features extremely low migration in PVC systems, making it suitable for manufacturing food packaging PVC products and drinking water supply pipes that require strict safety certification.

‌Excellent Formulation Compatibility‌
WSD CHEMICAL Methyltin Mercaptide shows perfect compatibility with PVC resin and all common PVC additives including processing aids, impact modifiers, pigments and fillers. It disperses uniformly throughout the polymer matrix without precipitation or blooming during long-term product service life, and will not negatively affect finished product surface properties or electrical performance.

‌Optimized Melt Flow and Processing Efficiency‌
The carefully designed composition of WSD CHEMICAL Methyltin Mercaptide improves PVC fusion behavior and reduces melt viscosity during processing. Compared with traditional mixed metal or lead salt stabilizer systems, it delivers better melt fluidity, lower equipment buildup tendency and fewer production line cleaning cycles, helping manufacturers boost overall production efficiency.

‌Outstanding Long-Term Performance Retention‌
PVC products stabilized with WSD CHEMICAL Methyltin Mercaptide maintain excellent color stability and physical properties over extended service periods. The stabilizer remains effective throughout the entire product lifecycle, preventing long-term yellowing and maintaining the original clarity and mechanical performance of finished PVC parts.

Technical Specifications

Different WSD CHEMICAL Methyltin Mercaptide grades are formulated with varying ratios of monomethyltin to dimethyltin components, to balance early-stage color performance and long-term thermal stability for different application scenarios. The typical technical parameters are shown below:

Item	Index
Product Name	Methyltin Mercaptide (Methyl Tin Stabilizer)
CAS Number	57583-34-3 / 57583-35-4
Chemical Type	Organotin thermal stabilizer based on methyltin mercaptide components
Physical Form	Clear, transparent and colorless to slight yellow viscous liquid
Tin Content	≥ 19.0% (by weight)
Density (25℃)	1.17 – 1.19 g/cm³
Viscosity (25℃)	60 – 90 mPa·s
Color (Pt-Co)	≤ 50
Freezing Point	≤ -10℃, remains viscous liquid at -20℃
Technical Documentation	WSD CHEMICAL Technical Data Sheet (TDS), Safety Data Sheet (SDS) and relevant compliance documentation available upon request

Applications of Methyltin Mercaptide

‌Methyltin Mercaptide for Transparent PVC Bottle and Container Production‌
WSD CHEMICAL Methyltin Mercaptide is the preferred stabilizer for transparent PVC bottles and packaging containers.

It enables processors to produce crystal-clear, color-free packaging products that meet strict visual requirements for cosmetic packaging, food containers and consumer goods packaging.

‌Methyltin Mercaptide for Food-Grade PVC Sheet and Film Processing‌
In food-contact PVC sheet and calendered film production, our Methyltin Mercaptide grades maintain full compliance with international food safety regulations while delivering excellent thermal stability during high-speed calendering operations, ensuring zero yellowing and consistent product clarity across long production runs.

‌Methyltin Mercaptide for Rigid PVC Pipe and Fitting Manufacturing‌
Selected Methyltin Mercaptide grades are specially optimized for drinking water supply PVC pipe production. They meet global drinking water contact safety standards, provide excellent long-term thermal stability during high-speed extrusion, and support consistent production of high-performance water supply piping systems.

‌Methyltin Mercaptide for Medical and Pharmaceutical PVC Products‌
Methyltin Mercaptide medical-grade formulations are suitable for manufacturing pharmaceutical packaging PVC products and medical device components. The extremely low migration characteristics ensure no undesirable substance transfer into medical contents, meeting strict pharmaceutical industry safety requirements.

‌Methyltin Mercaptide for PVC Profile and Transparent Rigid Articles‌
Specialized WSD CHEMICAL grades are widely used in transparent PVC profiles, clear rigid sheets and high-transparency PVC decorative products. They help manufacturers produce completely clear, defect-free rigid PVC parts with outstanding surface gloss and no visible haze.

‌Methyltin Mercaptide for High-Speed PVC Compounding and Pelletizing‌
Methyltin Mercaptide also performs excellently in high-speed PVC compounding and pelletizing processes. It maintains stable thermal protection even under intense shear conditions in twin-screw extruders, producing consistent high-quality PVC compounds for downstream processing.

Packaging, Storage & Handling

· ‌Packaging‌: 225kh per drum,18tons/20'GP

· ‌Storage‌: Keep in cool, dry, well-ventilated warehouse, avoid direct sunlight, high temperature and contact with strong acids and oxidizing agents

· ‌Shelf Life‌: 12 months under recommended sealed storage conditions

· ‌Handling Note‌: Avoid long-term skin contact and inhalation of vapor, please use with adequate local ventilation at workplace.

How to Select the Right Methyltin Mercaptide Grade

Choosing the appropriate WSD CHEMICAL Methyltin Mercaptide grade depends on your specific application, processing equipment and finished product performance requirements.

Key selection factors include:

‌Target Application‌: Transparent bottles, food-contact sheets, drinking water pipes, medical PVC products, transparent profiles or PVC compounding

‌Processing Method‌: Extrusion, injection molding, calendering, blow molding or high-speed pelletizing

‌Key Performance Priority‌: Early-stage color retention, long-term thermal stability, maximum transparency level or regulatory compliance requirements

‌Processing Temperature and Residence Time‌: Matched to your production line's typical processing temperature profile and material residence duration

‌Formulation System Compatibility‌: Consider existing lubricants, processing aids and other additives in your current PVC formulation

‌Regulatory Requirements‌: Confirm applicable standards for food contact, drinking water or medical applications in your target market

Before full-scale production application, WSD CHEMICAL always recommends conducting formulation testing and small-scale production trials with the selected grade under your actual processing conditions.

Frequently Asked Questions (FAQ)

Q: What is Methyltin Mercaptide?
A: Methyltin Mercaptide, also known as Methyl Tin Stabilizer, is a high-performance organotin thermal stabilizer specifically developed for PVC processing. It is recognized as one of the most efficient thermal stabilizer types, delivering exceptional thermal stability and transparency performance for rigid PVC products.

Q: What are the main advantages of using WSD CHEMICAL Methyltin Mercaptide?
A: WSD CHEMICAL Methyltin Mercaptide provides industry-leading thermal stability, crystal-clear transparency, food and drinking water contact compliance, excellent formulation compatibility, optimized melt flow performance and outstanding long-term performance retention for high-end PVC processing applications.

Q: What is the typical addition level of Methyltin Mercaptide in PVC formulations?
A: The recommended dosage depends on the specific application, formulation system and processing conditions. For general rigid transparent PVC formulations, the typical addition range is 1.5 to 2.5 parts per hundred resin (phr). You may refer to the grade-specific technical guidance provided by WSD CHEMICAL for detailed recommendations.

Q: Is WSD CHEMICAL Methyltin Mercaptide suitable for food contact PVC products?
A: Yes. WSD CHEMICAL Methyltin Mercaptide meets major international regulatory standards including US FDA 21 CFR 178.2010 and German BGA requirements. It features extremely low migration in PVC systems and can be safely used for manufacturing food packaging materials and drinking water supply pipes.

Q: How does WSD CHEMICAL ensure consistent product quality for Methyltin Mercaptide?
A: WSD CHEMICAL implements strict process control throughout the entire Methyltin Mercaptide production workflow, from raw material purification to finished product filtration and performance verification. Every production batch undergoes comprehensive testing including tin content analysis, viscosity measurement, color inspection and real PVC processing performance evaluation before delivery.