Pri snoveh, ki delujejo jedko (R34, R35) ali dražilno (R36, R37, R38, R41), določajo, kadar je to primerno, razvrstitev pripravka v preglednici IV navedene in v masnih odstotkih izražene mejne vrednosti koncentracije.
For substances that produce corrosive effects (R34, R35) or irritant effects (R36, R37, R38, R41), the individual concentration limits specified in Table IV, expressed as a weight/weight percentage, determine, when appropriate, the classification of the preparation.