Product Name

  • Name

    Triethoxypropylsilane

  • EINECS 219-842-7
  • CAS No. 2550-02-9
  • Article Data21
  • CAS DataBase
  • Density 0.889 g/cm3
  • Solubility Not miscible or difficult to mix in water. Soluble in alcohol, aromatic and aliphatic hydrocarbons.
  • Melting Point
  • Formula C9H22O3Si
  • Boiling Point 168.4 °C at 760 mmHg
  • Molecular Weight 206.357
  • Flash Point 61 °C
  • Transport Information UN 1993
  • Appearance liquid
  • Safety 26-36
  • Risk Codes 36/37/38
  • Molecular Structure Molecular Structure of 2550-02-9 (Triethoxypropylsilane)
  • Hazard Symbols IrritantXi
  • Synonyms Dynasylan PTEO;KBE 3033;Propyltriethoxysilane;Si 203;Silar 1249;Triethoxypropylsilane;VP-Si 203;n-Propyltriethoxysilane;
  • PSA 27.69000
  • LogP 2.44480

Triethoxypropylsilane Specification

The IUPAC name of n-Propyltriethoxysilane is triethoxy(propyl)silane. With the CAS registry number 2550-02-9, it is also named as Silane, triethoxypropyl-. The product's categories are Solution Deposition Precursors; Organosilicon; Self Assembly&Contact Printing; Self-Assembly Materials; SilanesOrganometallic Reagents; Trialkoxysilanes. Besides, it is liquid, which should be stored in dry inert gas in closed, cool and dry place. In addition, this chemical is a monomeric alkylalkoxysilane that, when exposed to moisture, is reactive with the minerals. And it is easy to dissolve in organic solvents to form clear, colorless, stable solutions. 

The other characteristics of this product can be summarized as: (1)EINECS: 219-842-7; (2)ACD/LogP: 2.79; (3)# of Rule of 5 Violations: 0; (4)ACD/LogD (pH 5.5): 2.79; (5)ACD/LogD (pH 7.4): 2.79; (6)ACD/BCF (pH 5.5): 78.12; (7)ACD/BCF (pH 7.4): 78.12; (8)ACD/KOC (pH 5.5): 787.86; (9)ACD/KOC (pH 7.4): 787.86; (10)H bond acceptors: 3; (11)H bond donors: 0; (12)Freely Rotating Bonds: 8; (13)Index of Refraction: 1.411; (14)Molar Refractivity: 57.69 cm3; (15)Molar Volume: 231.9 cm3; (16)Surface Tension: 23 dyne/cm; (17)Density: 0.889 g/cm3; (18)Flash Point: 61 °C; (19)Enthalpy of Vaporization: 38.82 kJ/mol; (20)Boiling Point: 168.4 °C at 760 mmHg; (21)Vapour Pressure: 2.14 mmHg at 25 °C.

Uses of n-Propyltriethoxysilane: this chemical is an important component in Sol-Gel system. Additionally, it can be used as a surface modifier to generate hydrophobicity (e. G. Mineral fillers or inorganic pigments). The medium-chain alkyl functionality in unique compound properties when KH-331 treated minerals or pigments are incorporated into polymers e. G. PP, PE. Moreover, it also can react with 2,2',2''-Azanetriyl-tris-ethanol to get 1-Propyl-2,8,9-trioxa-5-aza-1-sila-bicyclo[3.3.3]undecane.



This reaction will needs Xylene by heating for 2 hours. The yield is 41 %.

When you are using this chemical, please be cautious about it as the following: n-Propyltriethoxysilane is irritating to eyes, respiratory system and skin. You should wear suitable protective clothing when use it. Moreover, in case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

People can use the following data to convert to the molecule structure.
(1)SMILES:O(CC)[Si](OCC)(OCC)CCC
(2)InChI:InChI=1/C9H22O3Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-9H2,1-4H3
(3)InChIKey:NBXZNTLFQLUFES-UHFFFAOYAV
(4)Std. InChI:InChI=1S/C9H22O3Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-9H2,1-4H3
(5)Std. InChIKey:NBXZNTLFQLUFES-UHFFFAOYSA-N

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