['Dangerous goods']
['Classification - Dangerous Goods']
07/17/2024
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2.34 (1) The first step in determining the packing group of a mixture of liquids with an inhalation toxicity by vapour when one or more of the substances has an LC50 (vapour) less than or equal to 5 000 mL/m3, and the LC50 of each substance is known, is to determine the following data:
(a) determine the LC50 (vapour) for the mixture in accordance with section 2.33;
(b) where Pi is the vapour pressure of the ith substance in kPa at 20°C and an absolute pressure of 101.3 kPa, determine the volatility, Vi, of each substance in the mixture as
Vi = Pi multiplied by 106 then divided by 101.3;
(c) determine the ratio of the volatility of a substance to its LC50 for each substance with an LC50 less than or equal to 5,000 mL/m3 as
Ri = Vi divided by the LC50 of the ith substance;
and(d) set R equal to the sum of the Ri for each of the substances with an LC50 less than or equal to 5,000 mL/m3 as
R = R1 + R2 +... + (as needed).
(2) Using the data determined in accordance with subsection (1), the mixture is included in one of the following packing groups:
(a) Packing Group I, if
(i) R is greater than or equal to 10, and
(ii) the LC50 (mixture) is less than or equal to 1,000 mL/m3;
(b) Packing Group II, if
(i) R is greater than or equal to 1,
(ii) the LC50 (mixture) is less than or equal to 3,000 mL/m3, and
(iii) the criteria for inclusion in Packing Group I are not met; or
(c) Packing Group III, if
(i) R is greater than or equal to 0.2,
(ii) the LC50 (mixture) is less than or equal to 5,000 mL/m3, and
(iii) the criteria for inclusion in Packing Group I or II are not met.
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['Dangerous goods']
['Classification - Dangerous Goods']
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