Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 236-818-1 | CAS number: 13497-18-2
Endpoint summary
Administrative data
Description of key information
- Concentration of the silanol; the greater the initial concentration, the greater the degree of condensation. Significant condensation is not expected at concentrations less than approximately 100 mg/l, but is dependent on specific conditions.
- pH; the condensation reaction may be either acid or base catalysed.
- Temperature.
- Other species present.
- The nature of the R group
- The number of Si-OH groups; silanetriols condense more rapidly than silanediols.
Physicochemical properties
3-(Triethoxysilyl)-N-[3-(triethoxysilyl)propyl]-1-propanamine is a liquid at standard temperature and pressure. A glass transition occurs at approximately -120°C and the boiling point is 358°C. It has a predicted density of 1.01 g/cm3 at 20°C and a predicted vapour pressure of 1.8E-04 Pa at 25°C.
The substance is classified as a non-flammable liquid on the basis of the boiling point and a measured flash point of 95°C. It is not pyrophoric or flammable in contact with water. It has a measured self-ignition temperature of 255°C, and is not explosive and not oxidising on the basis of chemical structure. It is not surface active.
The hydrolysis half-life time of 3-(triethoxysilyl)-N-[3-(triethoxysilyl)propyl]-1-propanamine is 66.2 hours at 25°C and pH 7. It is not predicted to be surface active. It has a predicted low water solubility (23 mg/l), a predicted log Kow of 3.1 and a predicted vapour pressure of 1.8E-04 Pa at 25°C.
3-(Triethoxysilyl)-N-[3-(triethoxysilyl)propyl]-1-propanamine produces a silanol hydrolysis product
3-(trihydroxysilyl)-N-[3-(hydroxysilyl)propyl]-1-propanamine and ethanol according to the following equation:
[(CH3CH2O)3Si(CH2)3]2NH + 6H2O → [(HO)3Si(CH2)3]2NH + 6CH3CH2OH
The silanol hydrolysis product is predicted to be very soluble in water at 20-25°C (1E+06 mg/l) and has a predicted log Kow of -4.0. It is less volatile than the parent substance with a vapour pressure of 2.2E-010 Pa at 25°C (predicted).
Ethanol is miscible with water, has low log Kow (-0.3) and high vapour pressure (7910 Pa at 25°C) (Daubert, T E and Danner R P, 1985).
Silanetriols may undergo condensation reactions to give siloxane dimers, oligomers and polymers, according to the scheme:
RSi(OH)3 ⇄ RSi(OH)2OSi(OH)2R ⇄ RSi(OH)2O[Si(R)(OH)O]nSi(OH)2R
(where R is an alkyl or aryl side-chain)
A highly cross-linked gel may form. The degree of condensation that will occur may vary with:
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
