3 Hazardous Materials 3 Hazardous Materials
31 Definition
32 General
321 U.S. Department of Transportation
322 Postal Service
323 Mailer Responsibility
324 Mailability Rulings
325 DOT Hazardous Materials Warning Labels
326 Shipping Papers
327 Transportation Requirements
327.1 General
327.2 Air Transportation Prohibitions
328 Postal Service Hazardous Materials Table
33 Hazard Classes
331 Nine Classes
332 Limited Quantity
333 ORM–D Materials
334 Small Quantity
334.1 Definition
334.2 Mailability
334.3 Packaging and Marking
335 Packaging Requirements for Hazardous Materials
335.1 DOT Packing Groups
335.2 Postal Service Packaging Instructions
336 Nonmailable Materials Found in the Mailstream
34 Mailability by Hazard Class
341 Explosives (Hazard Class 1)
341.1 Definition
341.2 Mailability, Packaging, and Marking
342 Gases (Hazard Class 2)
342.1 Definition
342.2 Mailability
342.3 Packaging
342.4 Marking and Documentation
342.5 Mailability Rulings
343 Flammable and Combustible Liquids (Hazard Class 3)
343.1 Definition
343.2 Mailability and Packaging
343.3 Marking and Documentation
344 Flammable Solids (Hazard Class 4)
344.1 Definition
344.2 Mailability
344.3 Packaging, Marking, and Documentation
345 Oxidizing Substances, Organic Peroxides (Hazard Class 5)
345.1 Definition
345.2 Mailability
345.3 Packaging, Marking, and Documentation
346 Toxic Substances and Infectious Substances (Hazard Class 6)
346.1 Definitions
346.2 Mailability
346.3 Packaging, Marking, Labeling, and Documentation
346.4 Damaged Parcels
347 Radioactive Materials (Hazard Class 7)
347.1 Definition
347.2 Mailability
347.3 Packaging
347.4 Marking
347.5 Emergency Procedures
348 Corrosives (Hazard Class 8)
348.1 Definition
348.2 Mailability
348.3 Packaging
348.4 Marking and Documentation
349 Miscellaneous Hazardous Materials (Hazard Class 9)
349.1 Definition
349.2 Mailability
349.3 Packaging
349.4 Marking and Documentation
