n-Butyltrimethoxysilane Gelest SIB1988.0 Equivalent Specs
Sourcing a Verified n-Butyltrimethoxysilane Gelest SIB1988.0 Equivalent
Procurement teams requiring a direct functional match for specialized alkylalkoxysilane inputs must prioritize batch consistency and chromatographic purity over brand labeling. When identifying a supply chain partner for n-Butyltrimethoxysilane, the critical factor is the verification of chemical identity against established physical constants rather than proprietary catalog codes. NINGBO INNO PHARMCHEM CO.,LTD. maintains manufacturing protocols that align with rigorous international specifications for this organosilicon compound, ensuring seamless integration into existing formulations without requiring re-validation of core performance metrics.
Supply chain resilience for this Surface Modifier depends on the manufacturer's ability to maintain steady production of the CAS 1067-57-8 substance. Deviations in alkoxy group stability or hydrocarbon chain length can alter reaction kinetics during hydrolysis. Therefore, sourcing decisions should be grounded in certificate of analysis (COA) data that confirms the absence of higher oligomers or unreacted chlorosilane precursors. Our facility provides bulk synthesis capabilities designed to meet the throughput demands of industrial coating and composite manufacturing sectors.
For R&D departments evaluating material substitutions, accessing n-Butyltrimethoxysilane serving as a Silane Coupling Agent requires confirmation of methoxy functionality. The trimethoxy configuration ensures rapid hydrolysis rates compared to ethoxy variants, facilitating quicker cure times in moisture-cured systems. Verification of this functionality is standard in our quality control workflow, ensuring that every drum shipped meets the stoichiometric requirements of your synthesis protocols.
Validating Molecular Weight 178.30 and Density for R&D Formulations
Precise stoichiometric calculations in polymer chemistry rely on accurate physical constants. The theoretical molecular weight of 178.30 g/mol serves as the baseline for molar equivalency calculations when integrating this silane into sol-gel processes or resin modifications. Deviations in measured molecular weight often indicate the presence of hydrolysis products or condensation oligomers, which can prematurely increase viscosity in storage tanks. Density measurements at 0.9312 g/mL provide a secondary verification point for bulk liquid handling systems, ensuring volumetric dispensing equipment is calibrated correctly for this specific gravity.
The following table outlines the critical physical parameters expected for high-purity batches. These specifications are essential for validating incoming raw materials against internal quality standards.
| Parameter | Standard Specification | Typical Batch Data |
|---|---|---|
| Molecular Formula | C7H18O3Si | C7H18O3Si |
| Molecular Weight (g/mol) | 178.30 | 178.28 - 178.32 |
| Density (g/mL @ 25°C) | 0.9312 | 0.930 - 0.932 |
| Boiling Point (°C/mmHg) | 164-165 | 164 - 166 |
| Refractive Index @ 20°C | 1.3979 | 1.397 - 1.399 |
| Purity (GC-MS) | > 97% | > 98% |
Refractive index values near 1.3979 indicate a high degree of optical clarity and chemical homogeneity, which is particularly relevant for clear coat applications. Boiling point ranges between 164-165°C confirm the volatility profile expected for this chain length. Procurement managers should cross-reference these values against batch-specific COAs to ensure consistency across production runs. Variations outside these ranges may suggest contamination with lower molecular weight silanes or incomplete distillation during the manufacturing process.
Maximizing Hydrophobicity Through Alkyl Silane Surface Bonding
The primary function of this Hydrophobic Agent is to establish a non-polar interphase on inorganic substrates. Aliphatic hydrocarbon substituents, such as the n-butyl group, act as the hydrophobic entities that enable silanes to induce surface water repellency. The organic substitution must remain non-polar to effectively shield polar surfaces from interaction with water molecules. This hydrophobic effect is thermodynamically driven by the free energy of transfer of hydrocarbon molecules from an aqueous phase to a homogeneous hydrocarbon phase.
Successful surface modification requires the elimination or mitigation of hydrogen bonding at the substrate interface. Upon hydrolysis, the methoxy groups convert to silanols, which then condense with hydroxyl groups present on glass, metal, or mineral surfaces. The resulting siloxane network anchors the butyl chain outward, creating a low-energy surface. This configuration reduces the surface tension below that of water, causing beading and runoff. Unlike long-chain fluorinated compounds, alkyl silanes provide sufficient hydrophobicity for many industrial applications without the environmental persistence associated with perfluorinated chemicals.
In composite structures, this bonding mechanism protects against moisture ingress which can lead to delamination or corrosion. The butyl chain length offers a balance between steric hindrance and surface coverage. Shorter chains may not provide adequate shielding, while significantly longer chains can introduce flexibility issues or compatibility problems with rigid matrices. For formulators optimizing water resistance in pigmented coatings or treating inorganic fillers, the n-butyl configuration provides a proven equilibrium of performance and processability.
Confirming TSCA Compliance and Safety HMIS 3-2-1-X Ratings
Regulatory compliance for chemical imports into North America requires verification of TSCA inventory status. This product is listed on the Toxic Substances Control Act (TSCA) inventory, facilitating smoother customs clearance for US-bound shipments. Documentation should always be reviewed to confirm active status rather than exempted status, ensuring unrestricted commercial use. NINGBO INNO PHARMCHEM CO.,LTD. provides comprehensive regulatory support documentation to assist safety officers in maintaining compliance files.
Safety handling protocols are dictated by the Hazardous Materials Identification System (HMIS) ratings of 3-2-1-X. The health rating of 3 indicates that temporary incapacitation or residual injury could occur from intense or prolonged exposure. Proper personal protective equipment (PPE), including chemical-resistant gloves and eye protection, is mandatory during handling. The flammability rating of 2 corresponds to a flash point of 49°C, classifying the material as a combustible liquid that requires storage away from ignition sources. Ventilation systems must be adequate to prevent vapor accumulation in confined spaces.
The reactivity rating of 1 suggests the material is normally stable but can become unstable at elevated temperatures or pressures. The personal protection rating of X indicates specific requirements for respiratory protection depending on vapor concentrations. Safety Data Sheets (SDS) must be accessible to all personnel handling the material. Transport classifications typically align with UN3082 for environmentally hazardous substances, liquids, n.o.s., depending on regional regulatory interpretations. Ensuring that warehouse staff are trained on these specific HMIS parameters reduces the risk of industrial accidents and regulatory citations.
Understanding Water Vapor Permeability in Silane Derived Coatings
While silane and silicone derived coatings are among the most hydrophobic available, they maintain a high degree of permeability to water vapor. This characteristic allows coatings to breathe, reducing deterioration at the coating interface associated with entrapped water. In construction applications, such as rebar reinforced concrete, this breathability is critical. If water vapor is trapped beneath an impermeable layer, pressure buildup can cause blistering or spalling of the substrate. The molecular structure of the cured silane network permits the diffusion of water vapor molecules while blocking liquid water ingress.
Since ions are not transported through non-polar silane and silicone coatings, they offer protection to composite structures ranging from pigmented coatings to concrete reinforcements. Chloride ions, which drive corrosion in steel reinforcements, are effectively blocked by the hydrophobic barrier. However, the permeability to vapor ensures that moisture generated within the concrete matrix can escape during temperature fluctuations. This dynamic equilibrium prevents the accumulation of moisture that could freeze and expand in colder climates.
For R&D teams developing protective barriers, understanding this permeability profile is essential for predicting long-term durability. Testing methods such as ASTM E96 can quantify water vapor transmission rates. Formulations utilizing this Butyltrimethoxysilane derivative should be tested under varying humidity conditions to ensure the cured film maintains the balance between liquid water repellency and vapor transmission. This performance profile distinguishes alkyl silanes from film-forming polymers that may create a complete vapor barrier, which is not always desirable for porous substrates.
Technical validation of these properties ensures that the selected silane meets the performance lifecycle requirements of the final application. Whether used as a primer, additive, or standalone treatment, the physical chemistry of the cured layer dictates the protection level. Consistent raw material quality is the foundation of predictable coating performance.
Reliable supply chains and verified specifications are essential for maintaining production continuity in high-performance chemical manufacturing. To request a batch-specific COA, SDS, or secure a bulk pricing quote, please contact our technical sales team.