Butylamine Methyl Triethoxy Silane comes up quite a bit in chemical manufacturing circles. This material factors into a range of specialty coatings, adhesives, electronic encapsulation, and surface treatments. Chemists refer to it by its formula: C11H27NO3Si. The typical structure has a methyl triethoxysilane backbone, with a butylamine group attached at the silicon atom. This combination brings together the hydrophobicity of the butyl group, silane’s reactivity, and the amine’s functional activity, providing a molecular bridge between organic and inorganic substances. Users get a compound with a molar mass around 249 g/mol. As for HS Code, it falls under 2929.90 according to international customs registry, classifying it among organic silicon compounds.
Butylamine Methyl Triethoxy Silane generally looks clear and colorless in its liquid state, which dominates most supplier offerings. Liquid density usually sits between 0.92 and 0.97 g/cm³ at room temperature — that figure helps storage teams calculate inventory and assists researchers with reagent stoichiometry. The silane element shines here; those three ethoxy groups attached to silicon make it hydrolyzable in moist air, soon forming reactive silanols. Amine groups have a way of capturing moisture from air, so containers need tight lids. It doesn’t usually show up as a powder, flake, or pearl, but don’t be surprised by vendor-specific modifications. Boiling point rests well above 170°C, meaning you won’t lose product to evaporation under typical working conditions. As for crystal formation, this compound avoids it at standard temperatures, sticking by its oily liquid nature.
Lab users work with this material for its ability to modify surfaces, grafting onto glass, mineral fillers, textiles, and even polymer films. Methyl triethoxysilane groups hydrolyze in water, releasing ethanol as a byproduct. That chemistry calls for good ventilation during use, and gloves go a long way, since the amine portion can irritate skin and eyes. On the scale of hazardous materials, Butylamine Methyl Triethoxy Silane isn’t as volatile or toxic as some aliphatic amines, but it carries a range of risks. It is flammable, and liquid or vapor exposure to eyes may cause burns. Lung exposure to concentrated vapors hurts quite a bit, certainly more than many common cleaning products. Sourcing the raw materials involves some hazardous upstream intermediates, though finished Butylamine Methyl Triethoxy Silane doesn’t participate in dangerous polymerization or explosive decomposition under typical storage — it needs a serious ignition source to present a true accident risk.
A working knowledge of this compound changes the game for anyone modifying surfaces at the microscale. Glass fibers, silica, ceramics, even cross-linked rubber can pick up functional amine groups using this material, all thanks to silane chemistry that forms robust bonds at the interface. I’ve seen electronics manufacturers lean heavily on this additive to boost adhesion of resins to fillers. Bottle labels earn their keep in the warehouse — making sure nobody mistakes this for a more benign silane keeps accident numbers down. Store it at 2–8°C, keep moisture away, and it keeps for six months or longer with minimal product breakdown. Waterproof gloves, splash-proof goggles, lab coats: all essentials for the person working the bench. Vapors make a case for fume hoods, too. Spills ask for adsorbent and quick disposal, not a bucket of water, since it can fish for moisture and generate irritating vapors in the process.
Delving into the molecule, the silicon atom holds three ethoxy groups and one methyl group, with the fourth attachment spot accommodating the butylamine. This spatial configuration allows for hydrolysis from the ethoxy sites, opening up further reaction with hydroxyl-rich materials. The chain length on butylamine is short, flexible, and stays manageable in formulation work. That’s a big plus for chemists needing predictable crosslink density. Double-bond free, it ignores the radical initiators that sometimes drive unwanted byproducts in other specialty silane work.
In industrial experience, sourcing purity levels above 97% minimizes skin and vapor irritation and improves reproducibility in finished products. Lower-purity blends sometimes get offered at a discount, but unwanted byproducts clog up application machinery and mess with surface cohesion. Users work with liquid rather than crystalline or powder forms because the reactivity window for silane hydrolysis narrows dramatically once this material leaves its anhydrous state. Experience has shown that, despite its somewhat stubborn shelf life, keeping it cool and capped keeps a lot of frustration at bay.
Accurate, dependable data on raw materials like Butylamine Methyl Triethoxy Silane matters to anyone doing formulation, shipment, or end-product design. I’ve dealt with enough poorly labeled containers and ambiguous supplier sheets to know how much downtime this saves. If you plan on using or stocking this chemical, density, phase, and shelf life shouldn’t be a guessing game, and neither should safety and hazard notes. Transferring that attention to detail downstream — into user training and R&D notes — helps prevent injury, tainted batches, and regulatory headaches. That matters as much for the safety of the folks on the loading dock as it does for scientists on the formulation line.
Down the line, real progress for this compound looks like better secondary containment, cleaner label standards, and full transparency across the distribution chain. There’s room for green chemistry, including reduced-ethanol release packaging, as well as packaging sensors that show spoilage or moisture leaks. Until regulatory reform brings those standards to everyone, it comes down to end-users prioritizing up-to-date hazard sheets, regular staff training, and a culture that values chemical literacy at every shelf.
