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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 266-358-7 | CAS number: 66423-13-0
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
The vapour pressure of Mecoprop-P n-octyl ester is 0.00061 Pa at 20 °C.
Key value for chemical safety assessment
- Vapour pressure:
- 0.001 Pa
- at the temperature of:
- 20 °C
Additional information
The vapour pressures of Mecoprop-P n-octyl ester were measured using the Knudsen effusion method (decrease of mass), according to the guidelines OECD 104 / EU A.4.
Experiments were performed at six temperatures between 50 °C and 100 °C. The results permit the establishment of the relation between the vapour pressure of the compound and temperature, allowing the knowledge of the vapour pressure of the compound at different temperatures.
Based on the results, the vapour pressure of the compound was calculated to be 0.00061 Pa at 20°C, 0.0012 Pa at 25°C and 0.027 Pa at 50°C. These vapour pressure values were extrapolated from the experimental data.
In a further study a vapour pressure of 0.00285 Pa was determined. Measurements were performed between 35.02 and 79.90°C.
The vapour pressure of Mecoprop-P n-octyl ester is given by the following equation, recommended for the temperature range from approx.10 °C to 70 °C. Outside this temperature range, it is expected that the equation will progressively produce values that are higher than the real vapour pressure of the compound.
p = exp(-9362.6 / T + 26.076)
Where p is the vapour pressure in Pa and T is the temperature in Kelvin.
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.
