Silicones & Silicates
REACH
3-Ureidopropyltrimethoxysilane
CAS Number
23843-64-3
EC Number
245-904-8
What is 3-Ureidopropyltrimethoxysilane?
3-Ureidopropyltrimethoxysilane (CAS 23843-64-3), also known commercially as Ureidopropyltrimethoxysilane, is an organosilane coupling agent that bridges inorganic substrates and organic polymer matrices.
Where is 3-Ureidopropyltrimethoxysilane used?
- Glass fiber-reinforced composites and filled polymer systems: improves fiber-to-matrix adhesion, mechanical performance and moisture resistance
- Adhesives and sealants: primer or additive for bonding to glass, concrete and metal in construction and automotive assembly
- Electronics coatings: promotes adhesion of encapsulants and conformal coatings to circuit board substrates
- Moisture-cure systems: crosslinker contributing to network formation in silane-modified polymer sealants
- It improves adhesion at mineral or glass interfaces by forming covalent bonds on both sides of the interface.
Commercial specifications
- High purity grades for industrial compounding and specialty formulation
- Technical grade standard; high-purity grades for electronics and precision adhesives
- Packaging from small drums to IBC quantities
Other Names (Synonyms)
3-Trimethoxysilylpropylurea|Ureidopropyltrimethoxysilane
What are the physical properties of 3-Ureidopropyltrimethoxysilane?
Melting Point <-25°C
Boiling Point 217-225 °C
Density 1.150 g/cm³
Flash Point 210 °F
Appearance Amber clear liquid
Color Colorless to Light yellow
Odor Alcohol-like odor
Form liquid
Water Solubility 240-1000g/L at 20℃
Vapor Pressure 1 mm Hg ( 20 °C)
Refractive Index n 20/D 1.46(lit.)
Log P -3.3--0.2
How is 3-Ureidopropyltrimethoxysilane classified and handled safely? Learn More
Danger
GHS05· Corrosive GHS07· Irritant
Hazard Statements
H315 Causes skin irritation
H318 Causes serious eye damage
H335 May cause respiratory irritation
Precautionary Statements
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P271 Use only outdoors or in a well-ventilated area.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
Which trade and regulatory codes apply to 3-Ureidopropyltrimethoxysilane?
HS Code 29319090
Storage Class 10 - Combustible liquids