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EC number: 232-077-3
CAS number: 7785-26-4
Vapour Pressure (Pa)
Corresponding Temperature (°C)
plot of Log10(p) versus temperature (1/T) (with p in Pa and T
in K) gives the following statistical data using an unweighted least
results obtained indicate the following vapour pressure relationship:
(Pa)) = -1361.7 / T (K) + 7.3988
above equation yields a vapour pressure of 567 Pa at 293.15 K and 679 Pa
at 298.15 K.
plot of Log10(p ) versus reciprocal temperature (1/T) (with p
in Pa and T in K) gives the following statistical data using an
unweighted least square treatment.
(Pa)) = -859.99 / T(K) + 5.6799
above equation yields a vapour pressure of 558 Pa at 293.15 K and 624 Pa
at 298.15 K.
Vapour pressure of (-)-alpha-pinene was
measured using the static method according to guideline OECD 104 and
method EU A.4.
Log10(Vapour Pressure (Pa)) was plotted against 1/T (K) and a
linear function was obtained. With this equation, the vapour pressure
has been calculated for temperatures at 20°C and 25°C.
vapour pressure of the test item was calculated as 563 Pa at 20°C and
652 Pa at 25°C.
on the correlation coefficient R² over 0.95 and on the difference
between the two determinations at each temperature (< 20%), the study is
considered as valid.
pressure of (-)-alpha-pinene was calculated using the static method:
563 Pa at 20°C and 652 Pa at 25°C
A study was conducted according to Guideline OECD
104 and method EU A.4 to measure the vapour pressure of
(-)-alpha-pinene. As the results were obtained under GLP without
deviation, they were considered as valid and reliable without
restriction and used as key value.
This result is supported by consistent
experimental data obtained with alpha-pinene multiconstituent.
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