Physical and chemical properties of butyltin mercaptide
Butylmercaptostannane is an organotin compound with a chemical formula of C4H10OSSn and a CAS number of 26410-42-4. As an important class of organometallic compounds, butyltin mercaptide plays an important role in the chemical and industrial fields, especially in the application of polyvinyl chloride (PVC) stabilizers.
Physical properties
- Appearance and status: Tin butyl mercaptide usually appears as a colorless and transparent liquid, which is clear and free of impurities in its pure state.
- Density: Its density is approximately 1.13 g/cm³, measured at room temperature (20°C).
- Refractive index: At the same room temperature, the refractive index of butyltin mercaptide is approximately 1.580.
- Melting point and boiling point: The specific values are not clearly stated in public information, but since it is in a liquid state at room temperature, it can be speculated that its melting point is lower than room temperature and its boiling point is higher than the normal use temperature.
- Solubility: Butyltin mercaptide has good solubility in most organic solvents, such as dichloromethane, tetrahydrofuran, etc., but its solubility in water is limited.
Chemical properties
- Thermal stability: Butyltin mercaptide has high thermal stability and can function under high temperature conditions of PVC processing, effectively inhibiting the thermal degradation of PVC.
- Redox properties: Organotin compounds containing thiol groups (-SH) often show certain reducing properties and can react with oxidants.
- Coordination ability: The thiol group in butyltin mercaptide can be used as a ligand to form a complex with metal ions, which is also one of its important mechanisms as a PVC stabilizer.
- Reactivity: Reacts with unstable chlorine atoms in PVC to prevent dehydrochlorination reaction, thereby improving the thermal stability and processing performance of PVC.
- Odor: Butyltin mercaptide may have a distinctive odor related to its thiol group, but its odor is generally considered to be milder than that of other sulfur-containing compounds.
Safety and environmental considerations
- Toxicity: Organotin compounds usually have some toxicity, and butyltin mercaptide is no exception. Prolonged or heavy exposure may cause adverse effects on human health, especially on the nervous and reproductive systems.
- Environmental Impact: Organotin compounds degrade slowly in the natural environment and may cause harm to aquatic life. Therefore, strict environmental protection regulations should be followed when using and handling products containing butyltin mercaptide.
Precautions for use
Due to its potential health and environmental risks, the use of tin butylmercaptide requires strict compliance with safety guidelines. In industrial production, operators should wear appropriate personal protective equipment such as gloves, protective glasses and respiratory masks to reduce the risk of direct contact and inhalation. In addition, discarded butyltin mercaptide and the products it contains should be disposed of in accordance with hazardous waste treatment standards to avoid environmental pollution.
Conclusion
Butyltin mercaptide, as a member of organotin stabilizers, plays an indispensable role in PVC processing with its unique physical and chemical properties. missing role. However, its use also comes with safety and environmental considerations, and appropriate precautions need to be taken to ensure user safety and environmental sustainability.
Extended reading:
bismuth neodecanoate/CAS 251-964-6 – Amine Catalysts (newtopchem.com)
stannous neodecanoate catalysts – Amine Catalysts (newtopchem.com)
polyurethane tertiary amine catalyst/Dabco 2039 catalyst – Amine Catalysts (newtopchem.com)
N-Methylmorpholine – morpholine