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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-11-19 - 2018-11-23
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
static method
Specific details on test material used for the study:
Test Item Name: 2-tert-butyl-1,4-dimethoxybenzene
Other Name: Vetimoss
CAS number: 21112-37-8
Batch/ Lot Number: A18011C
Purity: 98%
Description: Clear pale yellow liquid
Re-test/ Expiry date: 06/06/2019
Key result
Test no.:
#3
Temp.:
20 °C
Vapour pressure:
20 Pa

Date: 19/11/2018 – 23/11/2018

Operator: G. Jordan / A. Venn

Preparation: Tested as received.

SOP Reference: CTL SOP No. 404B

Apparatus: Static Method Apparatus; Temperature Bath,  Balance, Pressure Monitors

Result: 20 Pa at 20°C (mean of runs 1 & 3)  

Full test results

Temp / °C Temp / K P / mbar **Pa / Pa
Run 1
*20  293.15 0.2 20
20.1 293.25 0.2047 20.47
30.1 303.25 0.4261 42.61
40.7 313.85 0.9633 96.33
49.9 323.05 1.7 170
64.7 337.85 4.3 430
Run 3
*20  293.15 0.2 20
20.4 293.55 0.2041 20.41
29.8 302.95 0.4265 42.65
40.3 313.45 0.9657 96.57
50.1 323.25 1.9 190
65.2 338.35 4.8 480

* - Determined by extrapolation

** - Calculated

Comments

Run 1 : Sample was degassed for approximately 3.5 hours.

Run 2 : Not reported due to a leak in the system.

Run 3 : Sample was degassed for approximately 3 hours.

Conclusions:
The vapour pressure of Vetimoss was reported to be 20 Pa at 20°C.
Executive summary:

The vapour pressure of Vetimoss was determined using the Static Method and according to the EU technical method A.4. The vapour pressure of Vetimoss was reported to be 20 Pa at 20°C.

Description of key information

The vapour pressure of Vetimoss was determined using the Static Method and according to the EU technical method A.4. The vapour pressure of Vetimoss was reported to be 20 Pa at 20°C.

Key value for chemical safety assessment

Vapour pressure:
20 Pa
at the temperature of:
20 °C

Additional information