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 Class 6: Toxic and Infectious Substances
Class 6 consists of toxic and infectious substances, and it is classified as below.
LABEL  DIVISION  DEFINITION
6.1 Toxic substances A substance which is liable either to cause death or serious injury or to harm human health if swallowed or inhaled or by skin contact.
6.2 Infectious substances A substance which either contains viable micro-organisms that are known or believed to cause disease in animals or humans, or genetically-modified micro-organisms and organisms which may be infectious.

6.1 is subdivided by packing groups as below.
Oral,Dermal and Dust/Mist Inhalation Hazards Division 6.1 Packing Group Criteria
Packing Group Oral Toxity LD50(mg/kg) Dermal Toxictiy LD50(mg/kg) Dust/Mist Inhalation Hazard LC50(mg/l)
I ¡Â 5 ¡Â 50 ¡Â 0.2
II > 5, but ¡Â 50 > 50, but ¡Â 200 > 0.2, but ¡Â 2.0
III > 5, but ¡Â 300 > 200, but ¡Â 1000 > 2.0, but ¡Â 4.0
Tear gas should belong to packing group II although its toxic reference belongs to packing group lll

Vapour Inhalation Hazard-Division 6.1 Packing Group Criteria
 Packing Group  Vapour Inhalation Hazard
I In the case that V ¡Ã LC50 and LC50¡Â 1,000 m/L/m3
II In the case that V ¡Ã LC50 and LC50¡Â 3,000 m/L/m3, and it does not belong to packing group l
III In the case that V ¡Ã 0.2 LC50 ÀÌ°í, LC50 ¡Â 5,000 m/L/m3 and it does not belong to packing group ll
"V" means at 20¡ÆC and saturated vapor pressure(ml/ m3) of standard atmospheric pressure.

6.2 is categorized according to standards as below.
Category A : In the case that substance is discharged during transportation and the discharged substance can cause permanent disability, fatal threat, or serious damage if it is exposed to healthy human or animal, it is classified as UN2814 (Infectious substance affecting humans); if it is harmful only to animal, it is classified as UN2900(Infectious substance affecting animal only)

Category B : Infectious Substances do not belong to category A is classified as UN3373 (Biological substance, Category B).