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EC number: 949-790-7
CAS number: -
In the range of 200°C to 230°C a log p
versus 1/T curve for the test item could not be determined since the
coefficient of correlation (r) was < 0.99 for the combined curve of the
two measurements and the single curve of the second measurement (data is
archived in the raw data).
Since no accurate vapour pressure could be
calculated from the obtained results, the weight losses were compared
with the results of benzo(ghi)perylene at the same temperatures. Since
the weight loss of the test item was lower than the weight loss of the
reference compound the vapour pressure of the test item is considered to
be lower than that of benzo(ghi)perylene.
Vapour pressure of the Test Item
Validation of the method is performed at
least once every year (Test Facility Project 20167632).
Each reference substance was measured in
duplicate by TGA using a temperature program that was specific for the
substance. Plots of log vT obtained at elevated temperatures and 1/T
were inter- or extrapolated to determine the log vT values at 20°C (log
vT,20). The log vT values were plotted against the logarithm of the
vapour pressure at 20°C in Pascal units (log PT, 20). Linear regression
analysis using the least squares method yielded an equation of log PT,20
= 1.27 x log vT,20 + 5.06. The coefficient of correlation (r) was >
0.99. The constants c and d specific for the
experimental arrangement were 1.27 and 5.06, respectively.
1.00 x 10 -10
by the vapour pressure regression curve of the validation study. No
literature value was available.
K., Handbook of environmental data on organic chemicals, 4th edition,
H.T., Formal toxicity summary for Chrysene, The Risk Assessment
Information System (RAIS), 1994.
D.R., CRC Handbook of Chemistry and Physics, 79th edition, CRC Press
LLC., Boca Raton, FL, USA, 1998.
The vapour pressure of the test item at
20°C (293K) and 25°C (298K) was:
20 °C : < 1.3 x 10-8 Pa 25 °C : <
5.5 x 10-8 Pa
Study conducted to recognised testing
guidelines with GLP certification
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