R1 - Reactive Chemical, Flammable. Any product meeting the definition of UN Class 4.2 (Spontaneously
Combustible) as defined in 49 CFR 173.124(b), which is likely to heat spontaneously under conditions normal to
transportation or storage, or is likely to heat up in contact with air and catch fire. Included in this group are
pyrophoric liquids that ignite spontaneously in dry or moist air at or below 130oF (54.4oC) as defined in 29 CFR
1910.1200.
R2 - Water Reactive Chemical. Any product meeting the definition of UN Class 4.3 (Dangerous when Wet) as
defined in 49 CFR 173.124(c), which on interaction with water, is liable to become spontaneously ignitable or to
give off flammable gases in dangerous quantities.
T1 - DOT Poison-Inhalation Hazard. A material, other than a poisonous gas (HCC G1), meeting the definition
of UN Class 6.1 (Poisonous Material) under 49 CFR 173.132(a)(1)(iii) and assigned to Hazard Zone A or B in
accordance with 49 CFR 173.133(a) and required to be marked or labeled "Inhalation Hazard" under 49 CFR
172.313 or 49 CFR 172.416 or 49 CFR 172.429. Codes 1, 2, 5, 6, or 13 are listed in the special provisions
column of 49 CFR 172.101 for those shipping names that are poison-inhalation hazards and would require this
HCC.
T2 - UN Poison, Packing Group I. A material, other than a poisonous gas (HCC G1) or Poison-Inhalation
Hazard (HCC T1), that is classed as a UN Class 6.1 (Poisonous Material), that for packing purposes has been
assigned Packing Group I (Great Danger) as defined in 49 CFR 173.133 (a)(1). This means that the toxicity is as
specified below:
Toxicity Ranges for Packing Group I
Route of Entry
Range
Test Animal
Oral Toxicity
Less than or equal to 5 mg/kg
Albino Rat
Dermal Toxicity
Less than or equal to 40 mg/kg
Albino Rabbit
Inhalation Toxicity
Less than or equal to 0.5 mg/L
Albino Rat
T3 - UN Poison, Packing Group II
A material, other than a poisonous gas (HCC G1) or Poison-Inhalation Hazard (HCC T1), that is classed as a UN
Class 6.1 (Poisonous Material), that for packing purposes has been assigned Packing Group II (Medium Danger)
as defined in 49 CFR 173.133 (a)(1). This means that the toxicity is as specified below:
Toxicity Ranges for Packing Group II
Route of Entry
Range
Test Animal
Oral Toxicity
Greater than 5 mg/kg and less than or equal to 50 mg/kg
Albino Rat
Dermal Toxicity
Greater than 40 mg/kg and less than or equal to 200 mg/kg
Albino Rabbit
Inhalation Toxicity
Greater than 0.5 mg/L and less than or equal to 2 mg/L
Albino Rat
B-11
