February 2014 Spray 37 Mailability Generally, the acceptability for mailing chemicals and other types of hazardous materials depends on packaging mass and volume, the ability of the complete mail piece to contain the material, and the method of absorbing and containing the product in case of leakage from the primary receptacle. To determine mailability of a specific material, a mailer must submit a safety data sheet (SDS) and the following information to the U.S. Postmaster General Pricing & Classification Service Center (PCSC): • Basic Description for the Hazardous Material • Chemical composition by percentage of ingredient • Flashpoint • Toxicity Characteristics • Irritation or Sensitization Properties • Special precautions necessary to permit handling without harm to USPS employees or damage to property or other mail •Explanation of warning labels and shipping papers required by state or federal regulations •Proposed packaging method, including the addressing and required markings •Proposed number of pieces to be mailed, class of mail, and Post Office(s) of mailing. DOT Hazard Class and Mailability Summary The chart below is a summary of the domestic and international mailability of hazardous materials, listed by hazard class and division. However, shippers are strongly advised to consult with the U.S. Postal Service before considering offering dangerous goods by mail. Copies of the U.S. Postal Service Publications referred to in this article may be obtained by contacting the author or from the following URLs: Domestic Mail Manual: http://pe.usps.gov/text/dmm300/ dmm300_landing.htm International Mail Manual: http://pe.usps.com/text/imm/welcome. htm USPS Publication 52: http://pe.usps.com/text/pub52/welcome.htm Spray
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