Chemical · Product Detail
N-Octadecyltrimethoxysilane
Moisture-sensitive alkylsilane for qualified inorganic-surface modification and hydrophobic treatments.
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N-Octadecyltrimethoxysilane at a Glance
ZXCHEM is an N-octadecyltrimethoxysilane supplier and exporter in China. N-Octadecyltrimethoxysilane, CAS 3069-42-9, is a long-chain alkyltrimethoxysilane used for inorganic-surface modification. The listed purity is >92.0%. Its formula is C21H46O3Si and molecular weight is 374.68 g/mol.
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Standard lead time is approximately 14 days from order confirmation.
N-Octadecyltrimethoxysilane Specifications
Grade-specific supply limits. The agreed specification and batch COA govern delivery.
Commercial Information
Storage & Shipping
Storage Conditions
Keep sealed in dry compatible containers, protected from moisture, heat and strong oxidizers. Maintain the temperature conditions on the agreed grade label; the material may solidify around 16–17°C. Do not introduce water during transfer.
Shelf life
One year in sealed original packaging under the specified storage conditions.
Packaging
200 L drums or IBC
Handling & Protection
Use dry, controlled transfer and local ventilation. Avoid mist and direct skin or eye contact; wear chemical-resistant gloves, goggles and protective work clothing. Hydrolysis releases methanol, so control vapour during any qualified aqueous processing.
What Is N-Octadecyltrimethoxysilane?
N-Octadecyltrimethoxysilane, CAS 3069-42-9, C21H46O3Si, is a long-chain alkyl silane that makes mineral and metal-oxide surfaces strongly hydrophobic. It is used to treat fillers and pigments and in water-repellent coatings.
The supply grade has purity above 92.0%. It melts at about 16–17°C, so it may solidify in cold weather.
It is not regulated as dangerous goods. It hydrolyses with moisture, releasing methanol, so keep containers sealed.
As an octadecyltrimethoxysilane supplier and exporter in China, ZXCHEM ships it in 200 L drums or IBCs.
See all surface treatment chemicals in our catalog.
N-Octadecyltrimethoxysilane Applications
Filler treatment
Hydrophobic treatment for silica, talc and fillers.
Pigment treatment
Improves pigment dispersion in oils and polymers.
Water-repellent coatings
Component of hydrophobic coatings.
Why Source N-Octadecyltrimethoxysilane from ZXCHEM
Combined chemical orders
Source several chemical raw materials through one ZXCHEM contact. We coordinate product selection, quotations and suitable consolidated shipments so you can plan the order with one team.
Dedicated R&D Laboratory
Discuss specifications, sample results and application questions with our technical team. Our dedicated R&D laboratory supports product testing and helps clarify material selection.
Experienced Chemical Logistics
ZXCHEM has more than 30 years of experience in dangerous-goods transportation. We coordinate suitable shipments through logistics companies in which we hold equity interests in Qingdao, Shanghai, Guangzhou and Tianjin.
Dedicated Purchasing Support
Your account manager follows the order from quotation and contract signing through shipment and after-sales support. One contact coordinates technical documents, commercial details and delivery updates.
N-Octadecyltrimethoxysilane FAQ
Which N-Octadecyltrimethoxysilane grade should I choose?
The listed supply specification is Purity >92.0%. Check the TDS for assay and impurity limits, then test a sample for compatibility and performance in your process.
Can I request a N-Octadecyltrimethoxysilane sample for testing?
Yes. We can provide free samples for testing. Tell us the application, the grade you need and the tests you plan to run.
How is N-Octadecyltrimethoxysilane packed and shipped?
Standard packing is 200 L drums or IBC. The usual MOQ is 1,000 kg, with a lead time of approximately 14 days from order confirmation. It ships as non-dangerous goods.
Which documents are available for N-Octadecyltrimethoxysilane?
The TDS lists the supply specification and the SDS covers safety and transport; both can be downloaded on this page. Each shipment comes with a batch COA.
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