DRMS-VSE — Hazardous Materials Safety Interpretation

Page 1U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration 1200 New Jersey Avenue, SE Washington, D.C. 20590 AUG 3 0 2012 Mr. Sandy Clark DRMS-VSE 700 E. Roth Rd., Bldg. S-3 French Camp, CA 95231 Ref. No. 12-0165 Dear Mr. Clark: This responds to your August 2, 2012 request for clarification on the classification of aerosols under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). Specifically, you ask if the proper shipping name, "UN 1950, Aerosols, flammable, n.o.s. (engine starting fluid) (each not exceeding 1 L capacity), 2.1" is used only for engine starting fluid or may it be used with any hazardous material aerosol that contains toluene, acetone, or isobutene. Section 173.22 states that it is the shipper's responsibility to properly classify a hazardous material. This office does not perform that function. However, upon review of the information you supplied, it is the opinion of this office, that the most appropriate proper shipping description for aerosols used as engine starting f1uid is "UN 1950, Aerosols, f1ammable, n.o.s. (engine starting fluid), (each not exceeding 1 L capacity), 2.1." There are five different entries in the Hazardous Materials Table (HMT; § 172.101) for UN 1950. Therefore, the most appropriate proper shipping description for aerosols containing toluene, acetone, or isobutene not used as engine starting fluid is "UN 1950, Aerosols, flammable (each not exceeding 1 L capacity), 2.1." I hope this answers your inquiry. If you need additional assistance, contact this office at (202) 366-8553. Sincerely, Robeti Benedict Chief, Standards Development Branch Standards and Rulemaking Division#

Page 2Drakeford, Carolyn (PHMSA) From: Sent: To: Subject: Attachments: INFOCNTR (PHMSA) Friday, August 03, 2012 3:31 PM Drakeford, Carolyn (PHMSA) FW: PSN question How to UNZIP.html; SecureZIP Attachments.zip 11.- D Jfo5 Hi Carolyn, This caller requested his letter be submitted as a formal letter of interpretation. Thanks, Victoria -----Original Message----- From: Clark, Sandy DLA CIV DISPOSITION SERVICES [mailto:Sandy.Ciark@dla.mil] Sent: Thursday, August 02, 2012 1:50PM To: INFOCNTR (PHMSA) Subject: PSN question Completed by AE via phone on 8/3/12 at 2:15 left vm Alcon, The title 49 has a proper shipping name in the HMT of "Aerosols, flammable, n.o.s. (engine starting fluid) (each not exceeding 1 L capacity), 2.1, UN1950. Question, is this shipping name only to be used with "engine starting fluid"? Or can it be used with any H/ /M aerosol i.e. that contains items like "toluene, acetone or isobutane" as its hazardous technical name? Thanks in advance, Mr. S. L. CLARK, JR. E.P.S., C.O.R., E.M.R., T.A.S.O. WK# {209) 982-2147 DSN 462 FAX# {209) 982-2095 DSN 462 Reputation is what men and women think of us; character is what GOD and Angels know of us ... 1#