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EC number: 205-232-8
CAS number: 136-23-2
25 °C temperature data: The
maximum temperature was 25.2°C, the minimum temperature was 24.6°C and
the mean temperature was 24.9°C. All data points were within the ± 0.5°C
criteria used for this test, the results obtained are deemed acceptable
and will be quoted as ± 0.5°C.
Actual weight Standard 1: 0.0230 g
Calculated Theoretical calculation Vapour pressure: No
analyte was observed in the test solutions. The vapour pressure at 25°C
was determined to be< 1 x 10-4Pa
below assuming that theconcentrationin
each test solution was lower than the LOO of 0.17 mg/L.Where:
Amount in solution = 0.17 mg/Lx 100 mL (dilution)/1000000 (conversion to
Time of Gas Flow (mins) = duration of test from start to finish.
Gas Flow (seconds/100 mL) = Time taken for gas flow to travel 100 mL.
Flow (L) = Flow that travels through the system in one minute converted
from mL to litres.
Gas Flow (m3-volume of saturated gas) = Gas flow (L) in one minute x
total time of gas flow/ 1000 to convert to m3 for use in calculation
Pressure is calculated as:(W/V)
* (RT / M), where:
= mass of evaporated test substance (g)
= volume of saturated gas (m3)
= universal gas constant (8.314 J/mol/K)
= temperature (K)
= molar mass of test substance (g/mol)
The direct measurement of vapour pressure
using the Gas Saturation method of determination has not been possible.
The test substance was analysed in triplicate and no analyte was
detected in any of the test solutions.
An estimated value has been determined based
on the LOD of the quantitative UV method. Since no analyte was
determined by UV analysis, the sample has a vapour pressure lower than
1E-04 Pa at 25 °C. No experimental evaluation of vapour pressure at 20
°C using this method has been performed as results would not be
significantly different and would not lower than those obtained at 25
°C. A value of < 1E-04 Pa at 20 °C will be reported as inferred.
The estimate analyte concentration quoted,
based on the analysis conditions, assumed the following:
- Gas saturation was achieved
For gas saturation to be achieved, the
extreme gas flow rates have to be > 30 % different (which they were for
this analysis, 49.8 % difference in extreme gas flow rate) and the
calculated vapour pressure be < 30 % different. As no actual analyte
concentration is determined, it is not possible to assess repeatability
of the calculated vapour pressure accurately.
- The analyte is stable in dichloromethane
during the analysis.
There is no indication of instability in the
testing performed. The results do not prove, definitively, that gas
saturatuon had occurred (as no analyte was detected and as a consequence
all subsequent calculations were carried out using a "less than LOD"
value) and therefore it has been assumed.
The vapour pressure of the test substance
was determined to be < 1E-04 Pa at 25 °C (± 0.5 °C).
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