HomeProducts

3-Ureidopropyltrimethoxysilane

CAS Number
23843-64-3
EC Number
245-904-8
Chemical Formula
C7H18N2O4Si
Molecular Weight
222.31 g/mol

Description

3-Ureidopropyltrimethoxysilane (CAS 23843-64-3 ), also known commercially as Ureidopropyltrimethoxysilane, is an organosilane coupling agent that bridges inorganic substrates and organic polymer matrices. It improves adhesion at mineral or glass interfaces by forming covalent bonds on both sides of the interface, reducing delamination and improving composite durability across various industrial applications. In glass fiber-reinforced composites and filled polymer systems, it improves fiber-to-matrix adhesion, directly affecting mechanical performance and moisture resistance of the finished part for long-term use. Adhesive and sealant formulators use it as a primer or additive to improve bonding to glass, concrete, and metal substrates, particularly in construction and automotive assembly projects. In coatings for electronics, it promotes adhesion of encapsulants and conformal coatings to circuit board substrates where long-term humidity resistance is critical for maintaining device integrity. It also functions as a crosslinker in moisture-cure systems, contributing to network formation in silane-modified polymer sealants used in high-performance industrial and commercial sealing applications. 3-Ureidopropyltrimethoxysilane is supplied as a liquid, typically at high purity grades suitable for industrial compounding and specialty formulation where consistent chemical performance is required. Technical grade is the standard offering across most suppliers, with high-purity grades available for electronics and precision adhesive applications. Packaging ranges from small drums to IBC quantities. Contact us for supply of 3-Ureidopropyltrimethoxysilane Request Quote

Other Names (Synonyms)

3-Trimethoxysilylpropylurea | Ureidopropyltrimethoxysilane

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point<-25°C
Boiling Point217-225 °C
Density1.150 g/cm³
Flash Point210 °F
AppearanceAmber clear liquid
ColorColorless to Light yellow
OdorAlcohol-like odor
Formliquid
Water Solubility240-1000g/L at 20℃
Vapor Pressure1 mm Hg ( 20 °C)
Refractive Indexn 20/D 1.46(lit.)
Log P-3.3--0.2

Safety & Handling

Danger
GHS05· CorrosiveGHS07· Irritant

Hazard Statements

H315Causes skin irritation
H318Causes serious eye damage
H335May cause respiratory irritation

Precautionary Statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P317Get emergency medical help.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P233Store in a well-ventilated place. Keep container tightly closed.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29319090
Storage Class10 - Combustible liquids