Explanatory notes
… that, when mixed with water at a concentration of 0.5 % at 20 °C and left to stand for one hour at the same … 4.5 x 10 -2 N/m (45 dyne/cm) or less at a concentration of 0.5 % at 20 °C are not regarded as surface-active agents and … the main function of the preparation ( headings 34.03 , 34.05 , 38.08 , 38.09 , 38.24 , etc., as the case may be). …
