Commission Regulation (EC) No 761/2009Show full title

2. DATA AND REPORTING

2.1. DATA

The vapour pressure from any of the preceding methods should be determined for at least two temperatures. Three or more are preferred in the range from 0 to 50 °C, in order to check the linearity of the vapour pressure curve. In case of Effusion method (Knudsen cell and isothermal thermogravimetry) and Gas saturation method, 120 to 150 °C is recommended for the measuring temperature range instead of 0 to 50 °C.

2.2. TEST REPORT

The test report must include the following information:

• method used,

• precise specification of the substance (identity and impurities) and preliminary purification step, if any,

• at least two vapour pressure and temperature values — and preferably three or more — required in the range from 0 to 50 °C (or 120 to 150 °C),

• at least one of the temperatures should be at or below 25 °C, if technically possible according to the chosen method,

• all original data,

• a log p versus 1/T curve,

• an estimate of the vapour pressure at 20 or 25 °C.

If a transition (change of state, decomposition) is observed, the following information should be noted:

• nature of the change,

• temperature at which the change occurs at atmospheric pressure,

• vapour pressure at 10 and 20 °C below the transition temperature and 10 and 20 °C above this temperature (unless the transition is from solid to gas).

All information and remarks relevant for the interpretation of results have to be reported, especially with regard to impurities and physical state of the substance.