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EC number: 252-161-3
CAS number: 34708-08-2
Vapour pressure [hPa]
An Antoine equation was fitted to the measured data points by regression analysis minimizing the sum of squares of relative pressure deviation.
ln p = A – B / (T - C)
[p in kPa; T in K]
A = 17.4547
B = 6537.70
C = 40.00
The vapour pressure of the test item at 20 °C was extrapolated from the Antoine equation. It was determined to < 1 hPa (at 20 °C).
The reviewers of this study calculated the vapour pressure as 0.23 Pa at 20°C and 0.38 Pa at 25°C, using the Antoine equation.
Vapour pressure [triethoxy(3-thiocyanatopropyl)silane]: < 100 Pa at 20°C
Vapour pressure [(3-thiocyanatopropyl)silanetriol]: 2.0E-06 Pa at
Vapour pressure [ethanol]: 7910 Pa at 25°C
A vapour pressure limit of < 1 hPa was extrapolated from measurements
between 136-270°C using a static method according to OECD Test Guideline
104. An Antoine equation was fitted to the measured results and a vapour
pressure at 20 and 25°C was calculated by the study reviewer as 0.23 and
0.38 Pa, respectively. The results are considered reliable and selected
The key value is supported by a predicted vapour pressure of 0.31 Pa at
25°C, determined for the registered substance using a validated QSAR
estimation method; the result is considered to be reliable. The QSAR
value has been validated using reliable measurements for structural
analogues reflecting the main constituent in the registered substance.
In the other available secondary source to which no reliability could be
assigned, a vapour pressure of < 1 hPa at 20°C was reported for the
Triethoxy(3-thiocyanatopropyl)silane (CAS 34708-08-2; EC No. 252-161-3)
hydrolyses moderately in contact with water to form
(3-thiocyanatopropyl)silanetriol and ethanol (CAS 64-17-5; EC No.
The vapour pressure of the silanol hydrolysis product,
(3-thiocyanatopropyl)silanetriol was determined to be 2.0E-06 Pa at 25°C
using an accepted QSAR estimation method. The result is considered
reliable and indicative of a low vapour pressure.
Ethanol has a reported vapour pressure of 7910 Pa at 25°C (Daubert, T E
and Danner R P (1985))
Daubert, T E and Danner R P (1985).Physical and Thermodynamic properties
of Pure Chemicals. Data Compilation)
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.
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