Silicones & Silicates
REACH
Tetra-(methylethylketoxime)silane
CAS Number
34206-40-1
EC Number
251-882-0
What is Tetra-(methylethylketoxime)silane?
Tetra-(methylethylketoxime)silane (CAS 34206-40-1), known in the silicone industry as TMEKS or ketoxime silane, is a tetrafunctional silane crosslinker that cures silicone-based systems at room temperature.
Where is Tetra-(methylethylketoxime)silane used?
- Oxime-cure silicone formulations: reactive core component releasing butanone oxime on moisture exposure to initiate network formation
- One-component room-temperature vulcanizing silicone sealants: crosslinker governing cure speed, mechanical strength and adhesion to glass, metal and plastics
- Construction and glazing: neutral-cure silicone sealants for curtain wall systems, window sealing and sanitary joints
- Silicone coatings for industrial and protective applications: builds crosslink density and surface durability
- Silicone adhesives: controlled cure kinetics and compatibility with silicone polymer blends
- It is a clear liquid handled under inert atmosphere in drums or IBC containers.
Good to know: Moisture-sensitive: packaging under inert atmosphere is standard practice to preserve reactivity.
Commercial specifications
- Purity commonly 97% or higher
Other Names (Synonyms)
2-Butanone, O,O',O'',O'''-silanetetrayltetraoxime|2-Butanone 2,2′,2′′,2′′′-(O,O′,O′′,O′′′-silanetetrayltetraoxime)|tetrakis(butan-2-ylideneamino) silicate|Tetra(methylethylketoxime)silane|Tetrakis(methylethylketoxime)silane
What are the physical properties of Tetra-(methylethylketoxime)silane?
Melting Point <0°C
Boiling Point 111°C
Density 0.932 g/cm³
Flash Point 4°C (Toluene)
Appearance Clear, yellow liquid
Water Solubility 36.63g/L
Vapor Pressure 0.002Pa at 25℃
Refractive Index 1.483 [20°C]
How is Tetra-(methylethylketoxime)silane classified and handled safely? Learn More
Danger
GHS02· Flammable GHS07· Irritant GHS08· Health Hazard
Hazard Statements
H228 Flammable solid
H315 Causes skin irritation
H317 May cause an allergic skin reaction
H319 Causes serious eye irritation
H373 May causes damage to organs through prolonged or repeated exposure
Precautionary Statements
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P240 Ground and bond container and receiving equipment.
P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.