Carriage of Dangerous Goods (Classification, Packaging and Labelling) and Use of Transportable Pressure Receptacles Regulations (Northern Ireland) 1997

Part VCriteria for Ascertaining Packing Groups of Goods which have been classified as Toxic Substances in accordance with Regulation 5

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

Column 1Column 2Column 3Column 4Column 5
Packing groupOral 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< 500V √ 10 ×LC50 and LC50 < 1000
II> 5 to < 50> 40 to < 200> 500 to < 2000V √ 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 < 10000V √ 0.2 × LC50 and LC50 < 5000 but not placed in either packing group I or II