For the purpose of this subchapter, poisonous material (Division 6.1) means a material, other than a gas, which is known to be so toxic to humans as to afford a hazard to health during transportation, or which, in the absence of adequate data on human toxicity:
Is presumed to be toxic to humans because it falls within any one of the following categories when tested on laboratory animals (whenever possible, animal test data that has been reported in the chemical literature should be used):
Oral Toxicity. A liquid with an LD50 for acute oral toxicity of not more than 500 mg/kg or a solid with an LD50 for acute oral toxicity of not more than 200 mg/kg.
Dermal Toxicity. A material with an LD50 for acute dermal toxicity of not more than 1000 mg/kg.
Inhalation Toxicity:
A dust or mist with an LC50 for acute toxicity on inhalation of not more than 10 mg/L; or
A material with a saturated vapor concentration in air at 20°C (68°F) greater than or equal to one-fifth of the LC50 for acute toxicity on inhalation of vapors and with an LC50 for acute toxicity on inhalation of vapors of not more than 5000 ml/mm 3; or
Is an irritating material, with properties similar to tear gas, which causes extreme irritation, especially in confined spaces.