The substance with CAS number 3068-76-6 is Trimethoxy[3-(phenylamino)propyl]silane, also known as N-(3-(Trimethoxysilyl)propyl)aniline, N-Phenyl-3-aminopropyltrimethoxysilane, etc. Its molecular formula is C₁₂H₂₁NO₃Si, molecular weight is 255.38554, and EINECS number is 221-328-2.
Trimethoxy[3-(phenylamino)propyl]silane is a low-viscosity colorless to light yellow clear liquid with a slight ammonia smell. The density is 1.07g/cm³, boiling point is 310 degree (760mmHg), refractive index is n20/D 1.50 nD25 is 1.506, and flash point is 230 degree F. It is soluble in conventional aliphatic and aromatic solvents such as alcohol, ether, and benzene. It is easily soluble in water but will undergo hydrolysis. It will also react with ketones, ester solvents, and carbon tetrachloride.
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| N-phenyl-3-aminopropyltrimethoxysilane | |
| 3068-76-6 | |
| C12H21NO3Si | |
| Density (ρ20ºC,g/cm³) | 1.07 |
| 25ºC) | 1.504 |
| Greater than or equal to 95% | |
| 310ºC | |
| 255.39 |
R34 - Causes burns.
R40 - Rare reports of carcinogenic effects.
R48/20/21/22 -
R52/53 -
R68 - Danger with possibly irreversible consequences.
R43 - Contact with skin may cause sensitization.
S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37/39 - Wear suitable protective clothing, gloves and goggles or mask.
S45 - In case of an accident or if you feel unwell, consult a doctor immediately (show the label if possible).
S35 - Handle this substance and its container with care.

In composite materials, it is widely used in the preparation of various composite materials, especially in plastic, rubber, and resin-based composite materials to enhance mechanical properties and stability.
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