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USPS Packaging Instruction 6B

Toxic Substances With LD50 Oral Toxicity of
50 mg/kg or Less

A Division 6.1 toxic substance having an LD50 for oral toxicity of greater than 5 mg/kg but less than or equal to 50 mg/kg is mailable only between authorized parties under the specific conditions in 346.231b.

Proper Shipping Name

ID Number

Mailability

Authorized Mailers

Toxic substances that have an LD50 for oral toxicity of greater than 5 mg/kg but less than or equal to 50 mg/kg may be mailed between the following parties subject to these specific conditions:

Note: Drugs and medicines that are not regulated as Division 6.1 materials are subject to the conditions in Chapter 4.

Required Packaging

Primary Receptacle
Absorbent and Cushioning Material
Secondary Container
Outer Shipping Container
Marking
Documentation