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2.42 (1) If a substance is known to be included in Class 8, Corrosives, and that knowledge is based on documentary evidence published in technical journals or government publications and testing is not done to determine the packing group, the substance must be included in Packing Group I.
(2) Class 8, Corrosives, are included in one of the following packing groups:
(a) Packing Group I, if
(i) they are known to cause full thickness destruction of human skin, that is, skin lesions that are permanent and that destroy all layers of the outer skin through to the internal tissues, or
(ii) full thickness destruction of intact skin tissue occurs within an observation period of 60 minutes after an exposure time of 3 minutes or less, as determined in accordance with OECD Guidelines 404 or OECD Guidelines 435;
(b) Packing Group II, if full thickness destruction of skin occurs within an observation period of 14 days after an exposure time of more than 3 minutes but not more than 60 minutes, as determined in accordance with OECD Guidelines 404 or OECD Guidelines 435; or
(c) Packing Group III, if
(i) full thickness destruction of intact skin tissue occurs within an observation period of 14 days after an exposure time of more than 60 minutes but not more than 4 hours, as determined in accordance with OECD Guidelines 404 or OECD Guidelines 435, or
(ii) they exhibit a corrosion rate that exceeds 6.25 mm per year at a test temperature of 55°C on steel or aluminum surfaces as determined in accordance with subparagraph 2.8.2.5(c)(ii) of the UN Recommendations.
| Packing Group | Exposure Time | Observation Period | Effect |
|---|---|---|---|
| I | ≤ 3 minutes | ≤ 60 minutes | Full thickness destruction of intact skin |
| II | > 3 minutes ≤ 1 h | ≤ 14 days | Full thickness destruction of intact skin |
| III | > 1 h ≤ 4 h | ≤ 14 days | Full thickness destruction of intact skin |
| III | - | - | Corrosion rate that exceeds 6.25 mm a year on either steel or aluminum surfaces at a test temperature of 55°C when tested on both materials |
(3) An in vitro test may be used instead of the test in the OECD Guidelines.
SOR/2014-306, s. 22