Environmental Impact Assessment of Dioctyltin Dimercaptoacetate

Dioctyltin dimercaptoacetate (DBT-DOTG), as a kind of organotin compound, plays an important role in plastic additives, especially as Use heat stabilizer. However, the use of any chemical requires consideration of its potential impact on the environment, and dioctyltin dimercaptoacetate is no exception. Environmental impact assessment mainly focuses on the following aspects:

1. Bioaccumulative

Organotin compounds, including dioctyltin dimercaptoacetate, present a risk of bioaccumulation due to their lipid solubility and stability. These substances may be transferred through the food chain, leading to increased concentrations in organisms at higher trophic levels, affecting the health of the ecosystem. Therefore, it is very necessary to strictly control the environmental release of such substances.

2. Toxic effects

Although dioctyltin dimercaptoacetate is less toxic than some other organotin compounds (such as tributyltin TBT), its potential toxic effects on aquatic life still need to be concerned. Research shows that organotin compounds may have adverse effects on the reproduction, growth and development of aquatic organisms such as fish and shellfish, and even lead to gender distortion. Therefore, monitoring concentrations in the environment to ensure that safety thresholds are not exceeded is a necessary measure to protect aquatic ecosystems.

3. Persistence and degradability

Organotin compounds usually have a certain degree of environmental persistence and are not prone to natural degradation. This means that once in the environment, they may remain for long periods of time, increasing their long-term impact on the environment. Assessing the environmental degradation mechanism of dioctyltin dimercaptoacetate and understanding its degradation rate under different environmental conditions is crucial for assessing its environmental risks.

4. Water pollution

Since dioctyltin dimercaptoacetate may enter water bodies through wastewater discharge during production, use and disposal, causing pollution to water quality, research on its migration, transformation and fate in the water environment is the focus of environmental impact assessment. Ensuring that industrial emissions comply with environmental standards and taking effective wastewater treatment measures can minimize their negative impact on the water environment.

5. Soil and sediment pollution

In addition to water bodies, organotin compounds may also enter soil and sediment through sedimentation, affecting soil microbial communities and sediment ecosystems. Assessing their accumulation and ecological effects in these environmental media is key to a comprehensive understanding of their environmental impacts.

6. Substitute development and risk reduction strategies

Given the potential environmental risks of organotin compounds, developing and promoting safer, biodegradable alternatives is an effective way to reduce the environmental burden. At the same time, implementing strict environmental management measures, such as restricting use, establishing recycling systems, and raising public and industry environmental awareness, are also important strategies to reduce the environmental impact of chemicals such as dioctyltin dimercaptoacetate.

In short, the environmental impact assessment of dioctyltin dimercaptoacetate is a complex process that requires comprehensive consideration of its distribution in the environment, toxicity, Degradability and impact on ecosystems in order to develop reasonable risk management measures and promote the sustainable use of chemicals.

Extended reading:

NT CAT DMDEE

NT CAT PC-5

NT CAT DMP-30

NT CAT DMEA

NT CAT BDMA

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

N-Methylmorpholine

4-Formylmorpholine

Application of dioctyltin dimercaptoacetate in plastic additives

Dioctyltin dimercaptoacetate (DBT-DOTG), as an efficient heat stabilizer and antioxidant, is widely used in the field of plastic additives. Especially in the processing and modification of polyvinyl chloride (PVC) and other polyolefin materials. Its unique mechanism of action and performance characteristics make it one of the key ingredients to improve the performance and extend the service life of plastic products. The following are several major applications of dioctyltin dimercaptoacetate in plastic additives:

1. Enhanced thermal stability

PVC materials are prone to dehydrochlorination reactions during processing and high-temperature use environments, resulting in material discoloration and reduced mechanical properties. Dioctyltin dimercaptoacetate can effectively capture the free radicals released during the degradation of PVC, prevent or delay this chain reaction, thereby significantly improving the thermal stability of PVC products. This is especially important for plastic products that need to undergo high-temperature processing during the production process, such as wire and cable insulation layers, plastic doors and windows for construction, etc.

2. Improved light stability and weather resistance

Because the dioctyltin dimercaptoacetate structure contains a thiol group, it can absorb and quench ultraviolet energy, reducing the damaging effect of ultraviolet rays on plastics, thereby improving the light stability and weather resistance of the product. This is of great significance for plastic products used outdoors, such as billboards, agricultural films, roofing materials, etc., which can effectively extend their outdoor service life and maintain good appearance and mechanical properties.

3. Improved transparency

In the production of transparent PVC products, dioctyltin dimercaptoacetate is a preferred additive because it can provide the necessary stability and protection while minimizing the impact on the transparency of the material. This is indispensable for products that require a high degree of transparency, such as transparent packaging materials, spectacle lenses, medical equipment, etc.

4. Processing performance optimization

The additive can also improve the processing properties of plastics, such as fluidity, mold release, etc. During processing, dioctyltin dimercaptoacetate can help materials better disperse and fuse, reduce processing defects, and improve production efficiency and product quality.

5. Eco-friendly alternatives

With increasingly stringent environmental regulations, the use of traditional lead salts and some toxic organotin stabilizers is being gradually restricted or banned. As a relatively low-toxic organotin stabilizer, dioctyltin dimercaptoacetate has become an ideal choice to replace these harmful substances and meets the market demand for environmentally friendly materials.

6. Composite Stabilizer Component

In practical applications, dioctyltin dimercaptoacetate is often used in combination with other additives such as phosphites, epoxy compounds, etc. to form a composite stabilizer system to further improve the overall performance and stability of plastic products with a synergistic effect.

In short, dioctyltin dimercaptoacetate plays an important role in the field of plastic additives due to its excellent stability and modification ability. Especially in the modern plastics industry that pursues high performance and environmental protection. However, its potential environmental impacts and human health risks also prompt researchers to continue to explore safer and more sustainable alternatives and technologies.

Extended reading:

NT CAT DMDEE

NT CAT PC-5

NT CAT DMP-30

NT CAT DMEA

NT CAT BDMA

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

N-Methylmorpholine

4-Formylmorpholine

Physical and chemical properties of dioctyltin dimercaptoacetate

Dibutyltin bis(isooctylthioglycolate), whose chemical formula is generally abbreviated as DBT-DOTG, is an organic tin compound that is widely used Stabilizer used in polyvinyl chloride (PVC) plastics, especially for the processing of transparent products, has a significant effect. It enables PVC products to maintain their physical and mechanical properties and extend their service life by providing good thermal stability, light stability and anti-aging properties. Below is a detailed description of some of the key physicochemical properties of dioctyltin dimercaptoacetate.

Physical properties

Appearance: Dioctyltin dimercaptoacetate is usually a light yellow to colorless oily liquid. This is due to its organic structural characteristics that allow it to remain liquid at room temperature.

Solubility: This compound has good solubility and is easily soluble in most organic solvents, such as esters, ethers, ketones, alcohols, aliphatic hydrocarbons, aromatic hydrocarbons and commonly used Plasticizer, but insoluble in water. This solubility characteristic is crucial for its use in polymer processing, allowing for uniform dispersion in the PVC matrix.

Density: Its relative density is approximately between 1.055 and 1.075 (measured at 30°C), which means it is lighter than water, helping to achieve uniform dispersion during certain processing processes .

Melting point and boiling point: Due to the fluidity of its molecular structure, dioctyltin dimercaptoacetate does not have a clear melting point, but has a wide solidification range. Its boiling point is relatively high, usually above hundreds of degrees Celsius. The specific value depends on experimental conditions and measurement methods.

Refractive index: The refractive index is between 1.490 and 1.500 (measured at 30°C). This parameter is of great significance for understanding its optical properties and its application in transparent products.

Viscosity: The viscosity of this compound is low, less than 90mPa·s (measured at 30°C), indicating that it has good fluidity and mixing properties during processing.

Chemical properties

Stability: Dioctyltin dimercaptoacetate is relatively stable at room temperature, but may decompose at high temperatures or in a strong alkaline environment. It has some stability to light and heat, but long-term exposure may still cause performance degradation.

Reactivity: The organotin part of this compound is sensitive to moisture in the air and may slowly hydrolyze, releasing free isooctyl thioglycolate. At the same time, the divalent tin ions contained in it can participate in coordination reactions and form stable complexes with a variety of ligands.

Toxicity and Environmental Impact: Although the information mentions “toxicity of toxic substances”, the specific toxicity level and environmental impact need to be determined based on the latest chemical safety data sheet (MSDS). Organotin compounds are generally considered toxic to aquatic life, and long-term exposure may have adverse effects on human health. Therefore, appropriate safety measures should be taken when using and handling to ensure compliance with environmental and occupational safety standards.

Application Features

In PVC processing, dioctyltin dimercaptoacetate is mainly used as a heat stabilizer, which can effectively inhibit adverse reactions caused by thermal degradation of PVC during processing and use, such as color changes and reduced mechanical properties. Its unique thiol group (-SH) provides excellent antioxidant and UV resistance, helping to improve the transparency and weather resistance of products. It is especially suitable for the production of high-end PVC products such as transparent bottles, plates, and sheets.

Conclusion

To sum up, dioctyltin dimercaptoacetate is an efficient heat stabilizer. Its unique physical and chemical properties make it widely used in the PVC industry. In particular, the field of transparent products shows broad application prospects. However, due to its potential environmental and health risks, increasingly strict regulations on its production and use have driven the industry towards research and development of safer and environmentally friendly alternatives. In the future, how to balance performance and sustainability will be an important topic for research in this field.

Extended reading:

NT CAT DMDEE

NT CAT PC-5

NT CAT DMP-30

NT CAT DMEA

NT CAT BDMA

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

N-Methylmorpholine</u>

4-Formylmorpholine