3-Aminopropyltrimethoxysilane Bulk Price Specs & Data
Procurement of 3-Aminopropyltrimethoxysilane (CAS: 13822-56-5) requires rigorous validation of physical constants and purity profiles to ensure consistent performance in silanization and coupling applications. Variations in density, refractive index, and amine content directly impact cross-linking density in composite materials. NINGBO INNO PHARMCHEM CO.,LTD. supplies industrial grades validated against strict GC-MS and titration protocols to meet formulation requirements without regulatory ambiguity.
Essential Technical Specifications for 3-Aminopropyltrimethoxysilane Bulk Validation
Technical validation begins with verifying physical constants against standard reference data. The molecular weight of 179.29 g/mol and the linear formula H2N(CH2)3Si(OCH3)3 define the stoichiometry for reaction calculations. Density values typically range between 1.02 g/mL and 1.027 g/mL at 25°C. Deviations outside this range often indicate hydrolysis due to moisture ingress or contamination with higher boiling oligomers. The boiling point is a critical distillation parameter, recorded at 194°C at atmospheric pressure or 80°C at 8 mmHg. Refractive index measurements at 20°C should stabilize around 1.4240, serving as a rapid identity check during incoming quality control.
The following table outlines the critical parameter ranges expected for industrial-grade material, comparing standard specifications against high-purity benchmarks derived from legacy technical portfolios:
| Parameter | Standard Grade | High Purity Grade | Test Method |
|---|---|---|---|
| Purity (GC) | ≥ 95% | ≥ 97% | GC-MS / Area % |
| Density (g/mL @ 25°C) | 1.020 - 1.025 | 1.025 - 1.027 | ASTM D4052 |
| Boiling Point (°C) | 190 - 194 | 193 - 195 | ASTM D1120 |
| Refractive Index (20°C) | 1.423 - 1.424 | 1.424 - 1.425 | ASTM D1218 |
| Flash Point (°C) | 83 - 90 | 85 - 90 | ASTM D93 |
| Amine Value (mg KOH/g) | 930 - 950 | 950 - 970 | Potentiometric Titration |
Moisture sensitivity is a defining characteristic of this monoamine functional trialkoxy silane. Specifications must include storage requirements under argon or nitrogen blankets to prevent premature hydrolysis of the methoxy groups. Incompatible materials include strong acids, oxidizing agents, and water, which trigger exothermic polymerization.
Key Drivers Influencing 3-Aminopropyltrimethoxysilane Bulk Price and Volume Tiers
Bulk pricing structures are primarily driven by raw material volatility in the organosilicon supply chain, specifically the costs of propylamine and chlorotrimethoxysilane precursors. Volume tiers significantly impact unit costs, with ISO tank shipments offering lower logistics overhead compared to drummed quantities. Packaging options typically include 200kg drums or IBC totes, where larger volumes reduce the per-kilogram price due to amortized handling and containment costs.
Market equivalents such as KBM-903 or Dynasylan AMMO often set baseline price expectations, but direct synthesis routes allow for competitive positioning. Procurement managers should anticipate price fluctuations correlated with energy costs required for distillation processes, as the separation of 3-Aminopropyltrimethoxysilane from reaction byproducts requires precise fractional distillation under vacuum. Supply contracts should specify Incoterms clearly, as the hazardous classification (UN2735, Hazard Class 8) influences freight surcharges.
Evaluating 95% vs 97% Purity Specs for Industrial 3-Aminopropyltrimethoxysilane Sourcing
The decision between 95% and 97% purity grades depends on the sensitivity of the downstream application. For general adhesion promotion in glass-filled polymers, the 95% grade is often sufficient. However, high-performance coatings or electronic encapsulants require the 97% grade to minimize unreacted amine residues that can cause yellowing or reduced thermal stability. GC-MS chromatograms should be reviewed to identify impurity profiles, specifically looking for dimers or hydrolyzed species that appear as broader peaks.
Higher purity correlates with consistent refractive index values closer to 1.4240. In formulations where stoichiometric balance is critical, such as curing epoxy systems, the additional cost of the 97% grade is justified by reduced waste and predictable cure kinetics. For users evaluating 3-Aminopropyltrimethoxysilane KBM-903 alternatives, verifying the amine value via titration is essential to ensure equivalent reactivity regardless of the stated purity percentage.
Mitigating Supply Chain Risks in 3-Aminopropyltrimethoxysilane Bulk Procurement
Supply chain risks for alkoxysilanes center on stability during transit and storage. Since the material is air and moisture sensitive, shipments must utilize sealed containers with inert gas headspace. Delays in customs or warehousing without climate control can lead to partial hydrolysis, rendering the batch unsuitable for precise coupling applications. Procurement strategies should include requiring batch-specific COAs that confirm water content is below 0.5%.
Diversifying supply sources with chemically equivalent grades like Z-6610 or GENIOSIL GF 96 reduces dependency on single manufacturers. However, each equivalent may have slight variations in trace metal content or isotopic composition that affect catalytic activities in specific syntheses. NINGBO INNO PHARMCHEM CO.,LTD. maintains inventory under controlled ambient temperatures to preserve shelf life, typically ensuring usability for 12 months from the date of manufacture if unopened. Safety data sheets must be reviewed for hazard statements H227, H315, and H318 to ensure proper PPE and storage infrastructure are in place before delivery.
Streamlining RFQ Processes for Accurate 3-Aminopropyltrimethoxysilane Bulk Price Quotes
An effective Request for Quote (RFQ) must specify the CAS number 13822-56-5 to avoid confusion with ethoxy variants or diamino silanes. Include target purity levels, required packaging (drum vs. bulk), and destination port to allow for accurate freight calculation. Specify if third-party inspection is required prior to shipment. Providing details on the intended application, such as use as a 3-Aminopropyltrimethoxysilane Silquest A-1110 Equivalent For Epoxy Adhesives, helps suppliers recommend the most cost-effective grade that meets performance benchmarks.
Clarify payment terms and lead times explicitly. Suppliers should be asked to confirm TSCA status and provide documentation on linear formula verification. Avoid vague descriptions like "silane coupling agent" without the specific chemical name. Accurate RFQs reduce back-and-forth communication and accelerate the sampling phase, allowing technical teams to validate density and boiling point data against internal standards before committing to bulk volumes.
Strategic sourcing of organosilanes requires a balance between cost efficiency and technical compliance. By focusing on verified physical constants and secure packaging protocols, procurement teams can ensure consistent production quality. To request a batch-specific COA, SDS, or secure a bulk pricing quote, please contact our technical sales team.