Overview
Phenyltris(butanoxime)silane (CAS 34036-80-1 ), also known as Phenyltris(methylethylketoximio)silane, is an oxime-functional silane crosslinker used in room-temperature vulcanizing (RTV) silicone systems.
It releases butanone oxime during cure, enabling moisture-triggered crosslinking without requiring elevated temperatures. In one-component RTV silicone sealants, it controls cure speed and network density.
This makes it a standard crosslinker for construction, glazing, and automotive sealing applications. Silicone adhesives for electronics and industrial assembly rely on it to achieve cohesive, flexible bonds.
The material provides good adhesion to glass, metal, and plastics. Formulators of silicone coatings use it to tune film hardness and surface properties in protective and release coating systems.
It also functions as a reactive modifier in silicone elastomer compounding, where it influences rheology during processing before final cure. This versatility is essential for high-performance industrial applications.
Phenyltris(butanoxime)silane is supplied as a liquid, typically in drums or IBC containers suited for industrial-scale sealant and adhesive manufacturing. It is available in technical grade for various uses.
Purity specifications are commonly confirmed by GC analysis to ensure consistent performance. Buyers should verify oxime content and moisture sensitivity controls when evaluating supply chain suitability.
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Physical Properties
| Melting Point | <0°C |
| Boiling Point | 60-65 °C @ Press: 3 Torr |
| Density | 0.995 g/cm³ |
| Flash Point | 90°C |
| Appearance | Clear to straw liquid with mild odor |
| Water Solubility | 36.63g/L |
| Vapor Pressure | 0.003Pa at 25℃ |
Safety & Handling
Warning GHS07 GHS08 Hazard Statements H317 May cause an allergic skin reaction H373 May causes damage to organs through prolonged or repeated exposure H412 Harmful to aquatic life with long lasting effects Precautionary Statements P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P501 Dispose of contents/container in accordance with local regulations. P302+P352 IF ON SKIN: Wash with plenty of water. P333+P317 Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse.
Other Names
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Chemical Properties
- CAS Number
- 34036-80-1
- EC Number
- 433-360-6
- Mol. Weight
- 363.5
- Category
- Silicones & Silicates