Horizon Hobby, Inc. — Hazardous Materials Safety Interpretation

Page 1U.5. Department of Transportation Pipeline and Hazardous Materials Safety Administration 1200 New Jersey Ave., SE Washington, DC 20590 Mr. Travis Morenz Distribution Center Supervisor Horizon Hobby, Inc. 4105 Fieldstone Road Champaign, IL 61822 Ref. No.: 0 9 4 2 1 2 Dear Mr. Morenz: This responds to your August 27,2009 letter regarding the definition of an aerosol in the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). Specifically, you ask if a metal container filled with a liquefied compressed gas but without the corresponding liquid, paste, or powder, can be defined as an aerosol. The answer is no. In accordance with $ 171.8, an aerosol means any non-refillable receptacle containing a gas compressed, liquefied or dissolved under pressure, the sole purpose of which is to expel a nonpoisonous (other than a Division 6.1 Packing Group I11 material) liquid, paste, or powder and fitted with a self-closing release device allowing the contents to be ejected by the gas. Also see related $9 171.23(b)(l) and 173.306(a)(3). I trust this satisfies your inquiry. Please contact us if we can be of further assistance. Hattie L. Mitchell Chief, Regulatory Review and Reinvention Office of Hazardous Materials Standards#

Page 2Written Interpretation of 49 CFR 173.306(a)(3) Page 1 of 1 Drakeford, Carolyn (PHMSA) From: INFOCN'TR (PHMSA) Sent: Thursday, August 27, 2009 12:05 PM To : Drakeford, Carolyn (PHMSA) Subject: FW: Written Interpretation of 49 CFR 173.306(a)(3) From: Travis Morenz [mailto:tmorenz@horizonhobby.com] Sent: Thursday, August 27,2009 11:43 AM To: INFOCNTR (PHMSA) Subject: Written Interpretation of 49 CFR 173.306(a)(3) Dear Sir or Madam, I am writing to you to ask for a Written lnterpretation regarding 49 CFR 173.306(A)(3). My questions are as follows: 1) Does a Propellant tank (7 oz to 17 oz) that is filled with a liquefied compressed gas (e.g., LPG blend) packaged without a liquid, paste, or powder in the container that is used as a power source for an Airbrush gun which is used to expel paint, meet the definition of "sole purpose of expelling paint " as outlined in 173.306(a)(3) 2) Can metal containers (7 oz to 17 oz cans of Airbrush propellant) that are filled with a liquefied compressed gas (e.g., LPG blend which is expelled as a vapor from the container ) that d o a contain a liquid, paste, or powder in the container (cans contain only the LPG propellant) be classified as "Aerosol" and shipped as ORMD under 49 CFR 173.306(a)(3)? 3) If these metal containers can not be shipped as ORMD under the 173.306(a)(3), would these container then have to be classified as UN 1075 and packaged and shipped as such? Thank you very much for your time and effort in this matter. Sincerely, Travis IVlorenz Travis Morenz Distribution Center Supervisor Horizon Hobby, Inc 41 05 Fieldstone Road Champaign, I L 61822 Cell phone #: 841 -5980 Office Phone#: 1-21 7-403-3569#