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EC number: 284-545-1 | CAS number: 84929-61-3 Extractives and their physically modified derivatives such as tinctures, concretes, absolutes, essential oils, oleoresins, terpenes, terpene-free fractions, distillates, residues, etc., obtained from Daucus carota, Umbelliferae.
When heating a sample of the test item in an open test tube (10*100 mm) in an aluminium block with a gas burner, formation of bubbles was observed at approx. 230 °C. At approx. 240 °C a noise of cracking occurred and the burner was turned off. The bubble chain broke at 213 °C. No signs of change were visible after cooling down.
The test item was filled into a sample tube containing a capillary tube in such a manner that the sealed part of the capillary was lying below the surface of the test item. The sample tube was then set into the aluminium block at 179.9 °C (first determination) and at 195.2 °C (second determination). For the increase of the temperature, a temperature gradient of 1 °C/min was maintained.When bubbles rose constantly on the boiling capillary, heating was turned down, and, cooling slowly, the capillary was observed constantly. The moment at which the chain of bubbles broke was recorded as boiling point (together with the appropriate atmospheric pressure).
The determination was performed in duplicate with fresh samples.
Table 4.3/1: Results
222.9 °C (496.1 K)
223.6 °C (496.8 K)
The deviation of the thermometer of 0.2 K was subtracted from the measured values.
Table 4.3/2: Observations
Beginning of Formations of bubbles /
Boiling chain, Heating plate turning off
230 °C /
After cooling down
No signs of change were visible
All measured values from the observation are without subtraction of the thermometer deviation.
Table 4.3/3.-Corrected values following Sidney-Young
Pressure in Pa
Corrected Boling point
222.9 °C (496.1 K)
223.39 °C (496.54 K)
223.6 °C (496.8 K)
224.10 °C (497.25 K)
223.7 °C (496.9 K)
Mean ± standard deviation (after correction following Sydney Young) = 223.7 ± 0.5 °C (496.9 ± 0.5 K) at standard pressure (101.325 kPa).
The initial boiling point of the test item was measured under GLP according to OECD 103 / EU A2 guideline, by Siwoloboff.
The test item was filled into a sample tube. The sample tube was then set into the aluminium block at 179.9 °C (first determination) and at 195.2 °C (second determination). For the increase of the temperature, a temperature gradient of 1 °C /min was maintained. When bubbles rose constantly on the capillary, heating was turned down, and, cooling slowly. The moment at which the chain of bubbles broke was recorded (with its atmospheric pressure) as boiling point .The determination was performed in duplicate.
The boiling temperature of the test item has been determined to be ca 223.7 ± 0.5 °C, corrected to standard pressure (101.325 kPa).
No change was observed after cooling down.
The initial boiling temperature of the test item has been determined to be 223.7 ± 0.5 °C, corrected to standard pressure (101.325 kPa).
A fully reliable experimental study, conducted according to a recognized OECD/EC method and under GLP, is available. It is considered as a key study.
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