The Carriage of Dangerous Goods by Road and Rail (Classification, Packaging and Labelling) Regulations 1994

PART V CRITERIA FOR ASCERTAINING PACKING GROUPS OF GOODS WHICH HAVE BEEN CLASSIFIED AS TOXIC SUBSTANCES IN ACCORDANCE WITH REGULATION 5 OF THESE REGULATIONS

Toxic substances shall be allocated into packing group I, II or III in accordance with the criteria given in the table below:

(1)	(2)	(3)	(4)	(5)
Packing grouip	Oral toxicity LD50 (mg/kg)	Dermal toxicity of LD50 (mg/kg)	Inhalation toxicity of dust or mists LC50 (mg/m3)	Inhalation toxicity of vapours where V is the saturated vapour concentration produced by the substance at 20°C expressed by reference to LC50 (ppm)
The above criteria are based on LC50 data relating to one hour exposure and where such information is available it should be used. However, where only LC50 data relating to 4 hour exposures is available, then: LC50 (4 hr) × 4 shall be considered equivalent to LC50 (1 hr) for dusts or mists, and LC50 (4 hr) × 2 shall be considered equivalent to LC50 (1 hr) for vapours.
I	≤5	≤40	≤500	V≥10 × LC50 and LC50≤1000
II	>5 to ≤50	>40 to ≤200	>500 to ≤2000	V≥LC50 and LC50 ≤3000 but not placed in packing group I
III	solids: >50 to ≤200 liquids: >50 to ≤500	>200 to ≤1000	>2000 to ≤10000	V≥0.2 × LC50 and LC50 ≤5000 but not placed in either packing group I or II