N-Octyltriethoxysilane 98% Procurement Specs & Data

Defining Critical Quality Parameters for n-Octyltriethoxysilane 98% Procurement Specs

Procurement of n-Octyltriethoxysilane requires strict adherence to physical constants and purity profiles to ensure consistent performance in hydrophobic coating formulations. The primary identifier for this alkyl silane is CAS 2943-75-1, with a molecular formula of C14H32O3Si and a molecular weight of 276.48 g/mol. Industrial grade material must demonstrate a minimum purity of 97.5% to 98%, verified through Gas Chromatography-Mass Spectrometry (GC-MS) analysis. Lower purity grades often contain residual ethanol or higher oligomers that interfere with surface bonding efficiency.

Physical constants serve as the first line of quality verification upon receipt of bulk shipments. The boiling point should range between 98-99°C at 2 mmHg, indicating proper fractional distillation during synthesis. Density is another critical parameter, typically measured at 0.8750 g/mL at 25°C. Deviations in density often signal contamination with lighter ethoxy species or heavier siloxane byproducts. The refractive index at 20°C should stabilize around 1.4160, while viscosity remains low at approximately 1.9 cSt at 25°C, facilitating easy pumping and mixing in industrial reactors. Flash point data, recorded at 109°C, dictates storage classification and handling protocols under HMIS 2-1-0-X standards.

When evaluating Certificates of Analysis (COA), procurement managers must prioritize GC area percentage data over simple titration results. A high-quality batch will show a dominant peak for the monomeric silane with minimal siloxane dimer or trimer presence. NINGBO INNO PHARMCHEM CO.,LTD. maintains rigorous internal testing protocols to ensure every batch meets these dense technical specifications before release. Consistency in these parameters ensures that the hydrophobic chain length remains uniform, which is essential for predictable water contact angles on treated substrates.

Cross-Referencing Equivalent Trade Names: Silquest A-137, Dynasylan Octeo, and UNISIL 137

The chemical market utilizes various trade names for n-Octyltriethoxysilane, often leading to confusion during supplier qualification. Common industry equivalents include Silquest A-137, Dynasylan Octeo, and UNISIL 137. Despite the branding differences, the underlying chemical structure remains Triethoxy(octyl)silane, characterized by the functional group CH3(CH2)7Si(OEt)3. Procurement teams must verify that the alternative supplier material matches the CAS number 2943-75-1 exactly, as some similar trade names may refer to methyltriethoxysilane or other chain lengths.

Understanding the interchangeability of these grades is vital for supply chain resilience. For facilities currently utilizing legacy stocks labeled under specific brand names, switching to generic CAS-based sourcing requires validation of physical properties. Engineers should consult our analysis on N-Octyltriethoxysilane Dynasylan Octeo Drop-In Replacement compatibility to ensure formulation stability during the transition. Similarly, for those migrating from Momentive legacy products, it is essential to review the Drop-In Replacement For Silquest A-137 Technical Data to confirm that rheology and cure times remain within acceptable tolerances.

The following table outlines the typical physical property correlations between generic specifications and common trade name equivalents, ensuring that procurement specs align with operational requirements:

Parameter	Generic Spec (98%)	Typical Trade Equivalent	Tolerance Limit
Purity (GC Area %)	≥ 97.5%	≥ 97.0%	± 0.5%
Boiling Point (°C @ 2mmHg)	98 - 99	97 - 100	± 1°C
Density (g/mL @ 25°C)	0.8750	0.8740 - 0.8760	± 0.001
Refractive Index (nD20)	1.4160	1.4150 - 1.4170	± 0.001
Color (APHA)	≤ 10	≤ 20	Visual Clear

Verification of these parameters prevents downstream issues such as phase separation in emulsions or inconsistent contact angles on treated surfaces. Procurement specifications should explicitly demand COAs that list these specific physical constants rather than generic pass/fail statements.

Verifying Regulatory Compliance: TSCA Inventory Status and Einecs 220-941-2

Regulatory compliance for alkyl silanes varies significantly by region, requiring precise documentation for cross-border logistics. For operations within the United States, n-Octyltriethoxysilane is listed on the Toxic Substances Control Act (TSCA) Inventory. Confirmation of TSCA status is mandatory for importation into US ports, and suppliers must provide a positive certification statement with each commercial invoice. Failure to document TSCA compliance can result in customs holds and significant supply chain delays.

In European and international contexts, the European Inventory of Existing Commercial Chemical Substances (Einecs) number 220-941-2 serves as the primary regulatory identifier. This number confirms the substance's historical presence in the market prior to relevant regulatory cutoffs. While regulatory landscapes evolve, maintaining accurate records of the Einecs number and TSCA status ensures smooth auditing processes. Procurement contracts should stipulate that the supplier warrants the material meets these specific inventory listings at the time of shipment.

Safety data sheets (SDS) must align with these regulatory identifiers. The HMIS classification of 2-1-0-X indicates moderate health hazards and flammability risks, necessitating proper storage in cool, dry areas away from oxidizers. Since this material hydrolyzes upon contact with moisture to release ethanol, ventilation systems must be capable of handling volatile organic compound (VOC) emissions during bulk transfer operations. Compliance documentation should never be generic; it must reference the specific CAS and Einecs numbers to avoid confusion with structurally similar silanes that may carry different regulatory burdens.

Assessing Application Suitability for Water Emulsions and ZnO-Polylactic Acid Composites

The functional utility of n-Octyltriethoxysilane extends beyond simple water repellency into complex composite modification. In water-based systems, this silane may be formulated into stable water emulsions, as documented in U.S. Patent 4,648,904. The octyl chain provides sufficient hydrophobicity to protect substrates while the ethoxy groups allow for hydrolysis and condensation onto surface hydroxyls. This balance is critical for masonry treatments and concrete sealers where vapor permeability must be maintained to prevent entrapped water deterioration.

Advanced material science applications utilize this silane to suppress nucleation behavior in ZnO-polylactic acid composites. Research published in Phys. Chem. Chem. Phys. (2012, 14, 12301) highlights how surface modification with aliphatic silanes influences the crystallization kinetics of biodegradable polymers. The non-polar organic substitution creates an interphase that shields polar surfaces from water interaction, reducing hydrogen bonding at the interface. This mechanism is vital for maintaining the mechanical integrity of composite structures exposed to humid environments.

Alkyl silanes like this function by creating a non-polar interphase that eliminates hydrogen bonding sites. Although silane and silicone-derived coatings are highly hydrophobic, they maintain permeability to water vapor, allowing coatings to breathe. This property is essential for rebar reinforced concrete and pigmented coatings where ion transport through the coating must be blocked to prevent corrosion. The free energy of transfer of hydrocarbon molecules from an aqueous phase to a homogeneous hydrocarbon phase drives the hydrophobic effect. Procurement teams should validate that the supplied silane has the correct chain length to achieve this thermodynamic balance, as shorter chains may not provide sufficient hydrophobicity while longer chains may hinder surface coverage density.

Strategic Sourcing Guidelines for Alkyl Silane Surface Bonding Agents

Securing a reliable supply of n-Octyltriethoxysilane requires a vendor capable of consistent bulk synthesis and rigorous quality control. Strategic sourcing should focus on manufacturers who can provide batch-specific GC-MS data and maintain inventory levels that match production cycles. When evaluating potential partners, request samples for in-house verification of boiling point and density before committing to large-volume contracts. The stability of the ethoxy groups during storage is also a factor; suppliers should guarantee packaging that prevents moisture ingress, typically using nitrogen-blanketed drums or IBCs.

For immediate access to verified inventory meeting these industrial standards, review the specifications for our n-Octyltriethoxysilane OTEO silane coupling agent. Direct sourcing from a specialized chemical manufacturer reduces the risk of counterfeit materials or off-spec blends often found in general distributor channels. NINGBO INNO PHARMCHEM CO.,LTD. supports long-term supply agreements with transparent documentation and consistent batch-to-batch reproducibility. This level of transparency is crucial for formulators who cannot afford variability in surface tension or cure rates.

Logistics planning should account for the hydrolytic sensitivity of the material. Transport conditions must avoid extreme temperature fluctuations that could accelerate premature condensation within the container. Procurement agreements should include clauses for replacement of any material arriving with visible precipitation or cloudiness, indicating water contamination. By prioritizing technical data over price alone, procurement managers ensure that the total cost of ownership remains low through reduced waste and consistent formulation performance.

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