Precedence of Hazard Table
[ Hazard class or division and packing group ]
4.2 | 4.3 | 5.1 I1 | 5.1 II1 | 5.1 III1 | 6.1, I dermal | 6.1, I oral | 6.1 II | 6.1 III | 8, I liquid | 8, I solid | 8, II liquid | 8, II solid | 8, III liquid | 8, III solid | |
3 I2 | 4.3 | 3 | 3 | 3 | 3 | 3 | (3) | 3 | (3) | 3 | (3) | ||||
3 II2 | 4.3 | 3 | 3 | 3 | 3 | 8 | (3) | 3 | (3) | 3 | (3) | ||||
3 III2 | 4.3 | 6.1 | 6.1 | 6.1 | 34 | 8 | (3) | 8 | (3) | 3 | (3) | ||||
4.1 II2 | 4.2 | 4.3 | 5.1 | 4.1 | 4.1 | 6.1 | 6.1 | 4.1 | 4.1 | (3) | 8 | (3) | 4.1 | (3) | 4.1 |
4.1 III2 | 4.2 | 4.3 | 5.1 | 4.1 | 4.1 | 6.1 | 6.1 | 6.1 | 4.1 | (3) | 8 | (3) | 8 | (3) | 4.1 |
4.2 II | 4.3 | 5.1 | 4.2 | 4.2 | 6.1 | 6.1 | 4.2 | 4.2 | 8 | 8 | 4.2 | 4.2 | 4.2 | 4.2 | |
4.2 III | 4.3 | 5.1 | 5.1 | 4.2 | 6.1 | 6.1 | 6.1 | 4.2 | 8 | 8 | 8 | 8 | 4.2 | 4.2 | |
4.3 I | 5.1 | 4.3 | 4.3 | 6.1 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | ||
4.3 II | 5.1 | 4.3 | 4.3 | 6.1 | 4.3 | 4.3 | 4.3 | 8 | 8 | 4.3 | 4.3 | 4.3 | 4.3 | ||
4.3 III | 5.1 | 5.1 | 4.3 | 6.1 | 6.1 | 6.1 | 4.3 | 8 | 8 | 8 | 8 | 4.3 | 4.3 | ||
5.1 I1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | |||||
5.1 II1 | 6.1 | 5.1 | 5.1 | 5.1 | 8 | 8 | 5.1 | 5.1 | 5.1 | 5.1 | |||||
5.1 III1 | 6.1 | 6.1 | 6.1 | 5.1 | 8 | 8 | 8 | 8 | 5.1 | 5.1 | |||||
6.1 I, Dermal | 8 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | |||||||||
6.1 I, Oral | 8 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | |||||||||
6.1 II, Inhalation | 8 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | |||||||||
6.1 II, Dermal | 8 | 6.1 | 8 | 6.1 | 6.1 | 6.1 | |||||||||
6.1 II, Oral | 8 | 8 | 8 | 6.1 | 6.1 | 6.1 | |||||||||
6.1 III | 8 | 8 | 8 | 8 | 8 | 8 |
1 See § 173.127 .
2 Materials of Division 4.1 other than self-reactive substances and solid desensitized explosives, and materials of Class 3 other than liquid desensitized explosives.
3 Denotes an impossible combination.
4 For pesticides only, where a material has the hazards of Class 3, Packing Group III, and Division 6.1, Packing Group III, the primary hazard is Division 6.1, Packing Group III.
Note 1: The most stringent packing group assigned to a hazard of the material takes precedence over other packing groups; for example, a material meeting Class 3 PG II and Division 6.1 PG I (oral toxicity) is classified as Class 3 PG I.
Note 2: A material which meets the definition of Class 8 and has an inhalation toxicity by dusts and mists which meets criteria for Packing Group I specified in § 173.133(a)(1) must be classed as Division 6.1 if the oral or dermal toxicity meets criteria for Packing Group I or II. If the oral or dermal toxicity meets criteria for Packing Group III or less, the material must be classed as Class 8.
49 C.F.R. §173.2a