| Identification | More | [Name]
Tetrapropoxysilane | [CAS]
682-01-9 | [Synonyms]
SILICON TETRA-N-PROPOXIDE
TETRA-N-PROPOXYSILANE
TETRA-N-PROPYL ORTHOSILICATE
TETRA-N-PROPYL SILICATE
TETRAPROPOXYSILANE
TETRAPROPYL ORTHOSILICATE
CT2090
Dynasil P
Propyl orthosilicate
Propyl silicate
Propyl silicate ((PrO)4Si)
Silane, tetrapropoxy-
Silicic acid (H4SiO4), tetrapropyl ester
silicicacid(h4sio4),tetrapropylester
Silicicacid,tetrapropylester
silicicacidtetrapropylester
Silicon orthopropoxide
Silicon tetrapropoxide
Tetrapropyloxysilane
Tetrapropylsilicate | [EINECS(EC#)]
211-659-0 | [Molecular Formula]
C12H28O4Si | [MDL Number]
MFCD00009364 | [Molecular Weight]
264.43 | [MOL File]
682-01-9.mol |
| Chemical Properties | Back Directory | [Appearance]
Colorless transparent liquid | [Melting point ]
<-80°C | [Boiling point ]
94 °C5 mm Hg(lit.)
| [density ]
0.916 g/mL at 25 °C(lit.)
| [vapor density ]
>1 (vs air)
| [vapor pressure ]
0.26Pa@25°C | [refractive index ]
n20/D 1.4(lit.)
| [Fp ]
203 °F
| [storage temp. ]
Inert atmosphere,Room Temperature | [form ]
liquid | [Specific Gravity]
0.916 | [Water Solubility ]
78mg/L@20°C | [Hydrolytic Sensitivity]
7: reacts slowly with moisture/water | [Sensitive ]
Moisture Sensitive | [BRN ]
1706115 | [InChIKey]
ZQZCOBSUOFHDEE-UHFFFAOYSA-N | [CAS DataBase Reference]
682-01-9(CAS DataBase Reference) | [NIST Chemistry Reference]
Tetrapropyl silicate(682-01-9) | [EPA Substance Registry System]
682-01-9(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing .
S37/39:Wear suitable gloves and eye/face protection . | [RIDADR ]
1993 | [WGK Germany ]
3
| [F ]
10-21 | [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
III | [HS Code ]
29209090 |
| Questions And Answer | Back Directory | [Introduction]
Tetrapropoxysilane (TPOS), [also called n-Propyl Silicate] is used as a cross-linking agent for silicon rubber, and as a modifying agent for organic and inorganic resins. The ethyl group of ethyl silicate is replaced by the N-propyl group, so the speed of hydrolysis is slower than ethyl silicate.
| [Applications]
- As an inorganic binder for refractory fillers and pigments, like precision investment castings.
- As a second backup casting coating. It cures faster than colloidal silica system.
- May be hydrolyzed to form silicon dioxide (silica).
- As a binder in zinc-rich (corrosion resistant) coating.
- As a starting material for sol-gel process.
- As a crosslinking agent for silicone sealant.
- As a drying agent in sealing compositions.
- As a chemical intermediate.
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