Quick Search
Monobutyl tin tris-(2-ethylhexanoate) ligands act as bulky, branched carboxylate groups that provide steric protection and solubility in organic media, making the compound compatible with many polymeric and solvent-based systems.
Monobutyl tin tris-(2-ethylhexanoate) is widely utilized as a catalyst or stabilizer in the manufacture of polymers, especially in the production of polyurethane foams, silicone rubbers, and other specialized plastics.
Monobutyl tin tris-(2-ethylhexanoate) catalytic activity facilitates the chemical reactions required for polymerization and cross-linking, improving manufacturing efficiency and the final material’s performance characteristics, such as flexibility, durability, and thermal stability.
CAS Number: 23850-94-4
Molecular Formula: C28H54O6Sn
Molecular Weight: 605.43
EINECS Number: 245-912-1
Synonyms: Stannane, butyltris((2-ethyl-1-oxohexyl)oxy)-, Fascat 4102, Fascat 9201, Butyltin tris(2-ethylhexoate), EINECS 245-912-1, Butyltris((2-ethyl-1-oxohexyl)oxy)stannane, Stannane, butyltris((2-ethylhexanoyl)oxy)-, Stannane, butyltris[(2-ethyl-1-oxohexyl)oxy]-, Hexanoic acid, 2-ethyl-, 1,1',1''-(butylstannylidyne) ester, BUTYLTRIS[(2-ETHYL-1-OXOHEXYL)OXY]STANNANE, Stannane, butyltris((2-ethylhexanoyl)oxy)-(8CI), 245-912-1, 23850-94-4, [butyl-bis(2-ethylhexanoyloxy)stannyl] 2-ethylhexanoate, n-Butyltris(2-ethylhexanoate)tin, MFCD00015260, AKOS015909591, Butyltin tris(2-ethylhexanoate), 95%, NS00050896, A816938, butylbis[(2-ethylhexanoyl)oxy]stannyl 2-ethylhexanoate, 2-ethylhexanoic acid [butyl-bis(2-ethyl-1-oxohexoxy)stannyl] ester, N-BUTYLTRIS(2-ETHYLHEXANOATE)TIN;BUTYLTIN TRIS(2-ETHYLHEXANOATE);Butyltrisethylhexanoatetin;Stannane, butyltris(2-ethyl-1-oxohexyl)oxy-;Derivative of monobutyltin;Monobutyltin-tris-(ethylhexoate);Butyltin tris-(2-ethoxyhexanoate);Butyltris(2-ethylhexanoyloxy)tin(IV)
Monobutyl tin tris-(2-ethylhexanoate) is one of numerous organometallic compounds manufactured by American Elements under the trade name AE Organometallics.
Organometallics are useful reagents, catalysts, and precursor materials with applications in thin film deposition, industrial chemistry, pharmaceuticals, LED manufacturing, and others.
American Elements supplies organometallic compounds in most volumes including bulk quantities and also can produce materials to customer specifications.
Most materials can be produced in high and ultra high purity forms (99%, 99.9%, 99.99%, 99.999%, and higher) and to many standard grades when applicable including Mil Spec (military grade), ACS, Reagent and Technical Grades, Pharmaceutical Grades, Optical, Semiconductor, and Electronics Grades.
Monobutyl tin tris-(2-ethylhexanoate) is an organotin compound that consists of a tin (Sn) atom chemically bonded to one butyl group and three 2-ethylhexanoate ligands, which are derived from the 2-ethylhexanoic acid molecule.
This specific chemical structure combines the metallic center with organic groups, resulting in a compound that exhibits unique chemical and physical properties useful in industrial applications.
Monobutyl tin tris-(2-ethylhexanoate) is valued for its ability to stabilize polyvinyl chloride (PVC) during processing by preventing thermal degradation and discoloration, which would otherwise reduce the quality and lifespan of PVC-based products.
However, because it belongs to the broader class of organotin compounds, its use is carefully regulated due to potential environmental and health concerns, as such compounds may exhibit toxicity to aquatic organisms and pose risks to human health upon prolonged exposure.
Monobutyl tin tris-(2-ethylhexanoate) is a light yellow transparent liquid, soluble in most organic solvents, insoluble in water.
It is a kind of esterification catalyst with low amount of hydrolysis and high catalytic activity.
Monobutyl tin tris-(2-ethylhexanoate) is mainly used for esterification and polycondensation with reaction temperature of 210~240 "C, and the maximum reaction temperature can reach 250C.
The catalyst is neutral and has no corrosive effect on the equipment.
After the reaction is completed, it does not need to be separated and does not affect the quality of the final product.
Melting point: –33 °C
Boiling point: 544.8 ± 33.0 °C (Predicted)
Density: 1.105 g/mL at 25 °C (lit.)
Vapor pressure: 0.47 Pa at 25 ℃
Refractive index: n²⁰/D 1.465 (lit.)
Flash point: >230 °F
Storage temp.: Inert atmosphere, Room Temperature
Solubility: 34.386 g/L in organic solvents at 20 ℃
Specific gravity: 1.105
Water solubility: 152 μg/L at 20 ℃
LogP: 2.55 at 20 ℃
Monobutyl tin tris-(2-ethylhexanoate), with the CAS number 23850-94-4, is an organotin compound commonly used as a stabilizer in PVC and other polymer formulations.
Monobutyl tin tris-(2-ethylhexanoate) is characterized by its coordination of a butyltin moiety with three 2-ethylhexanoate ligands, which enhances its solubility and compatibility with various materials.
Monobutyl tin tris-(2-ethylhexanoate) typically appears as a colorless to pale yellow liquid and has a relatively low volatility.
Monobutyl tin tris-(2-ethylhexanoate) exhibits good thermal stability, making it suitable for high-temperature applications.
Monobutyl tin tris-(2-ethylhexanoate) is known for its effectiveness in preventing degradation of polymers during processing and end-use.
However, like many organotin compounds, it raises environmental and health concerns due to its potential toxicity and bioaccumulation in aquatic systems.
Therefore, its use is regulated in many jurisdictions, necessitating careful handling and disposal practices.
Overall, while it serves important industrial functions, its environmental impact must be managed responsibly.
Monobutyl tin tris-(2-ethylhexanoate) is a liquid organotin homogenous catalyst that is used primarily as an esterification catalyst.
Alternatively, but less commonly, Monobutyl tin tris-(2-ethylhexanoate) can be used as a polyurethane catalyst.
Monobutyl tin tris-(2-ethylhexanoate) is a monobutyltin-based organotin that is lower in toxicity compared to dibutyl-based organotins.
Of the commonly used tin catalysts in esterification, Monobutyl tin tris-(2-ethylhexanoate) is the only liquid catalyst available.
Other esterification catalysts include Monobutyl tin tris-(2-ethylhexanoate) and inorganic tin products including REAXIS C129 (Stannous Octoate), REAXIS C160 (Stannous Oxalate), REAXIS C162 (Stannous Chloride), and REAXIS C188 (Stannous Oxide).
Monobutyl tin tris-(2-ethylhexanoate) is a versatile organotin compound that plays a crucial role in the chemical industry due to its multifunctional properties.
Structurally, it comprises a central tin atom bonded to one butyl group and three 2-ethylhexanoate moieties, the latter being derived from 2-ethylhexanoic acid, a branched fatty acid known for its hydrophobic and bulky nature.
This unique molecular configuration imparts both lipophilicity and thermal stability to the compound, allowing it to interact effectively with various organic substrates and polymers.
In industrial applications, Monobutyl tin tris-(2-ethylhexanoate) is predominantly used as a catalyst in the synthesis of polyurethane foams and silicone elastomers.
Monobutyl tin tris-(2-ethylhexanoate) catalytic activity accelerates the reaction between isocyanates and polyols in polyurethane production, which leads to the rapid formation of polymer chains and the creation of materials with desirable physical properties such as resilience, flexibility, and moisture resistance.
Similarly, it catalyzes the cross-linking reactions in silicone chemistry, contributing to the manufacture of durable silicone rubbers and coatings widely used in automotive, medical, and construction industries.
Monobutyl tin tris-(2-ethylhexanoate) is employed as a thermal stabilizer for polyvinyl chloride (PVC) during its processing and fabrication stages.
PVC tends to degrade when exposed to high temperatures, releasing hydrochloric acid which causes discoloration and loss of mechanical integrity.
Monobutyl tin tris-(2-ethylhexanoate) helps to neutralize these acidic by-products and inhibits the chain-scission reactions that compromise PVC’s structural stability, thereby enhancing the material’s longevity and appearance.
Despite its valuable industrial uses, Monobutyl tin tris-(2-ethylhexanoate) must be handled with care due to its classification within organotin compounds, which are known for their potential toxicity.
Exposure to this chemical may pose health risks such as skin and respiratory irritation, and environmental concerns arise because organotin compounds can be highly toxic to aquatic life, leading to bioaccumulation and long-term ecological damage.
Consequently, regulatory agencies have imposed strict guidelines on the manufacture, use, and disposal of such compounds, encouraging the development of safer alternatives and protective measures in occupational settings.
Uses Of Monobutyl tin tris-(2-ethylhexanoate):
Monobutyl tin tris-(2-ethylhexanoate) is an organotin compound, which can be used for the synthesis of saturated polyester for powder coating, coil (steel) coating, insulating paint, etc.
Used for the synthesis of unsaturated polyester; Used for the synthesis of PBT engineering resin and other esterification and transesterification reaction products.
Monobutyl tin tris-(2-ethylhexanoate) finds extensive application across various industries primarily due to its exceptional catalytic and stabilizing properties.
One of its most prominent uses is as a catalyst in the production of polyurethane foams, where it significantly accelerates the chemical reactions between isocyanates and polyols, thereby enabling manufacturers to control the foam’s density, hardness, and resilience to meet specific performance criteria required for applications such as insulation, furniture cushioning, and automotive seating.
In addition to its catalytic role in polyurethane synthesis, this organotin compound is widely employed as a curing agent and cross-linking catalyst in the manufacture of silicone rubbers and elastomers.
By facilitating the cross-linking of polymer chains, Monobutyl tin tris-(2-ethylhexanoate) enhances the mechanical strength, elasticity, and thermal resistance of silicone materials, which are essential attributes for products used in demanding environments such as medical devices, sealants, gaskets, and electrical insulation.
Monobutyl tin tris-(2-ethylhexanoate) serves as a heat stabilizer in the processing of polyvinyl chloride (PVC).
During PVC fabrication, exposure to elevated temperatures can cause the polymer to degrade, releasing hydrochloric acid that results in discoloration and reduced physical durability.
By acting as a thermal stabilizer, monobutyl tin tris-(2-ethylhexanoate) prevents or delays such degradation processes, ensuring that PVC products retain their appearance and structural integrity over time, which is crucial for applications ranging from construction materials to consumer goods.
Beyond these primary uses, monobutyl tin tris-(2-ethylhexanoate) also finds applications as a catalyst in various organic synthesis reactions, including esterifications and transesterifications, due to its ability to accelerate chemical transformations without being consumed.
This catalytic activity is especially valuable in industrial processes aiming to produce specialty chemicals, coatings, and adhesives with precise molecular architectures and enhanced performance characteristics.
Despite its versatility, the use of monobutyl tin tris-(2-ethylhexanoate) is regulated to minimize potential adverse environmental and health effects, encouraging industries to optimize its application and seek safer alternatives where possible, while still benefiting from its unique chemical properties.
In addition to its established applications as a catalyst and stabilizer, monobutyl tin tris-(2-ethylhexanoate) is frequently utilized in the formulation of coatings and paints, where it acts as a catalyst to improve the curing process of silicone- and polyurethane-based finishes.
By accelerating cross-linking reactions, it enables the formation of tough, durable, and chemically resistant surfaces that protect substrates from environmental damage such as corrosion, UV degradation, and mechanical wear, making it invaluable in industries such as automotive manufacturing, aerospace, and marine coatings.
Furthermore, this organotin compound is employed in the manufacture of adhesives and sealants, where its catalytic properties ensure efficient polymerization and curing under controlled conditions.
The resulting products exhibit enhanced bonding strength, flexibility, and resistance to moisture and chemicals, attributes that are critical for construction, electronics, and packaging industries. Its ability to provide consistent and rapid curing contributes significantly to production efficiency and product reliability.
Another important industrial use of monobutyl tin tris-(2-ethylhexanoate) is found in elastomer production for medical and consumer applications.
Monobutyl tin tris-(2-ethylhexanoate)’s catalytic effectiveness facilitates the production of high-quality silicone elastomers, which are widely used for medical tubing, implants, prosthetics, and consumer goods such as kitchenware and personal care products.
The enhanced thermal and mechanical properties imparted by the catalyst ensure that these elastomers meet stringent safety and performance standards required in these sensitive fields.
Additionally, it is sometimes employed in the modification of polymer blends and composites, where it helps improve compatibility and interfacial bonding between different polymer phases.
This leads to materials with superior mechanical properties, improved chemical resistance, and better processability, expanding the range of applications from automotive parts to high-performance industrial components.
Lastly, monobutyl tin tris-(2-ethylhexanoate) has specialized uses in laboratory and research settings as a catalyst for various synthetic organic reactions.
Its ability to accelerate esterification and transesterification reactions, without significant side reactions or catalyst degradation, makes it a valuable reagent for chemists developing novel polymers, pharmaceuticals, and fine chemicals.
Safety Profile Of Monobutyl tin tris-(2-ethylhexanoate):
Monobutyl tin tris-(2-ethylhexanoate), like many organotin compounds, poses several significant hazards that must be carefully managed to protect both human health and the environment.
Due to its chemical nature, exposure to this compound can occur through inhalation, skin contact, or ingestion, each of which may result in adverse toxicological effects.
Inhalation of its vapors or aerosols may cause irritation to the respiratory tract, leading to symptoms such as coughing, wheezing, or shortness of breath, especially in occupational settings where the compound is handled in large quantities or at elevated temperatures.
Prolonged or repeated skin contact with monobutyl tin tris-(2-ethylhexanoate) has the potential to cause irritation or sensitization, which can manifest as redness, itching, or dermatitis.
Moreover, due to its lipophilic nature, the compound may penetrate the skin barrier and accumulate in fatty tissues, leading to systemic toxicity.
There is also concern regarding its potential neurotoxic effects, as organotin compounds are known to interfere with nervous system function, possibly causing headaches, dizziness, or more severe neurological symptoms with chronic exposure.
From an environmental standpoint, monobutyl tin tris-(2-ethylhexanoate) is classified as highly toxic to aquatic organisms, even at low concentrations.
Its persistence and bioaccumulation in aquatic environments can disrupt ecosystems, adversely affecting fish, invertebrates, and other wildlife.
These compounds can interfere with reproduction and development in aquatic species, contributing to long-term ecological imbalance.
Consequently, accidental spills or improper disposal of this chemical pose substantial risks to water quality and biodiversity.
