§2.33 Determination of LC50 (dust, mist or vapour) of a mixture of substances

2.33 To determine the LC₅₀ of a mixture of substances that are in the form of a dust, mist or vapour, when the LC₅₀ of each of the substances is known, make the determination in accordance with section 2.17, except that for a dust use 10 mg/L as the toxic limit and for a mist use 2 mg/L as the toxic limit. For a substance in the form of vapour the toxic limit is the same as for a gas, which is 5 000 mL/m³.

SOR/2002-306, s. 13