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EC number: 404-450-2 | CAS number: 118685-34-0 COBRATEC 435
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
The vapour pressure of Butyl benzotriazole - sodium salt has been determined as: 1.64 x 10-2 Pa at 298 K
Key value for chemical safety assessment
- Vapour pressure:
- 0.016 Pa
- at the temperature of:
- 25 °C
Additional information
Analytical data are given in Figure 2. A plot of Log vapour pressure (Pa) versus reciprocal temperature (1/K) by computer gave a straight Iine lndicating the following relationship:
Log Vp (Pa) = slope + intercept temperature (K)
Vapour pressure at 298 K was calculated by extrapolation using the computer.
Results are given temperature (1/K) in the table:
| Run 1 | Run 2 | |
| Slope | -3830.527 | -3791.457 |
| Error in slope | 265.094 (6.921%) | 101.841 (2.686%) |
| Intercept | 11.0892 | 10.9126 |
| Error in intercept | 0.880 (7.940%) | 0.334 (3.065%) |
| Vapour pressure at 298K (Pa) | 1.72 x 10 -2 | 1.55 x 10 -2 |
| Mean result | 1.64 x 10 -2 |
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