Paragraph 4 CORROSIVE AND IRRITANT EFFECTS

Solid and liquid preparations

(1)

—For substances that produce corrosive effects (R34, R35) or irritant effects (R36, R37, R38, R41), the individual concentration limits specified in Table IV determine, when appropriate, the classification of solid and liquid preparations.

TABLE IV

Classification of the substance and/or relevant standard risk phrase	Classification of the preparation and standard risk phrase
at least C with R35	at least C with R34	at least Xi with R41	at least Xi with R36, R37, R38
at least C with R35	conc. ≥ 10% R35 obligatory	5% ≤ conc. < 10% R34 obligatory		1% ≤ conc. < 5% R36, R38 obligatory
at least C with R34		conc. ≥ 10% R34 obligatory		5% ≤ conc. < 10% R36, R38 obligatory
at least Xi with R41			conc. ≥ 10% R41 obligatory	5% ≤ conc. < 10% R36 obligatory
at least Xi with R36, R37, R38				conc. ≥ 20% R36, R37 and R38 are obligatory in light of the concentration present if they apply to the substances under consideration

Gaseous Preparations

(2)

—For gases that produce corrosive effects (R34, R35) or irritant effects (R37, R41), the individual concentration limits specified in Table IVA below, expressed as a volume/volume percentage determine, when appropriate, the classification of gaseous preparations and shall determine which particular risk phrases are to be assigned to them.

TABLE IVA

Classification of the substance (gas) and/or relevant standard risk phrase	Classification of the gaseous preparation and standard risk phrase
at least C with R35	at least C with R34	at least Xi with R41	at least Xi with R36, R37 or R38
at least C with R35	conc. ≥ 1% R35 obligatory	0.2% ≤ conc. < 1% R34 obligatory		0.02% ≤ conc. < 0.2% R37 obligatory
at least C with R34		conc. ≥ 5% R34 obligatory		0.5% ≤ conc. < 5% R37 obligatory
at least Xi with R41			conc. ≥ 5% R41 obligatory	0.5% ≤ conc. < 5% R36 obligatory
at least Xi with R36, R37, R38				conc. ≥ &5percnt; R37, R36, R38 obligatory as appropriate