# Arkansas Children"s Hospital — Hazardous Materials Safety Interpretation **Citation:** 04-0142 **Type / status:** guidance / guidance **Agency:** Pipeline and Hazardous Materials Safety Administration **Effective:** Not stated **Published:** 2004-06-18 04-0142 response to Arkansas Children"s Hospital concerning 175.10. ## Document text <<>> .S. Departmer f Transportatio 400 Seventh St., S.W. Washington, D.C. 20590 Special Programs Research and JUN 18 2004 Administration Wes Ware, BS, RRT, NREMT Reference No.: 04-0142 Flight Respiratory Therapist Arkansas Children's Hospital 800 Marshall Street Little Rock, Arkansas 72202 Dear Mr. Ware: This responds to your letter concerning the exception for oxygen in § 175.10 of the whether a mixture of "Helium" and "Oxygen," commonly called Heliox, and ranging in Hazardous Materials Regulations (HMR; 49 CFR parts 171-180). Specifically, you ask ratios from 80:20 to 60:40 and used for medical purposes is excepted from the HMR under the provisions in § 175.10(a)(7). The answer is yes. As provided in § 175.10(a)(7), oxygen or any hazardous material, including a mixture of helium and oxygen, used for the generation of oxygen, for medical use by a passenger, and furnished by the aircraft operator in accordance with 14 CFR 121.574 or 135.91 is excepted from the HMR. I trust this satisfies your request. Sincerely, Hathe z. mitchel Hattie L. Mitchell Chief, Regulatory Review and Reinvention Office of Hazardous Materials Standards 175:10(a) (1) 040142 <<>> Corbin $175.1066) Air Exception 0. 6577 Edward T. Mazzullo, Director • DHM-10 Ofoe of Hazardous Materials Standards 04-0142 400 7ch St., S. W. Washington, DC 20590-0001 Dear Mr. Mazzullo I would like a clarification on 49CFR 175.10(aX7) which states: Oxygen, or any hazardous material used for the generation of oxygen, for medical use by a passenger, which is furnisbed by the aircraft operator in accordanoe with or 135.91. For purposes of this paragraph, an aircraft operator that is not a conformance with or |35.91 in the same manner as roquired for a certificate certificate holder under 14 CFR pan: or part 135, may apply this exception in holder. The Clarification I am seeking deals with using Oxygen that is mixed with Heliom. Heliox, as it is commonly called, is conposed of Helium and Oxygen mixed in ratios a manner similar to Oxygen. Heliox is available in compressed gas cylinders. Due to ranging from 80:20 to 60:40. Heliox is coumonly used to treat respiratory conditions in size limitations and need for portability, an 'E" cylinder sould most likely be used. Does 49CFR 175.10(a)7) apply to a Helium-Oxygen mixture for medical use by a passenger in an aircraft? Thank you for your help in this matter. If may be of further assistance please contact me Sincerely, Whe 8PM Little Rock, AR 72202 2004 501-766-0643 Waretve@ARcbildrens.org .. jun. <<>> a Chaner's hospital 600 Marstrall Street, Slot 604 ANGEL ONE TRANSPORT Litte Rock Arkansas 72202 501-3641459 Office 501-3646429 24 Hour Communication Center No. 6577 501-3646431 Fax- Fax Transmittal Form To: Edward Mazzullo, office of Hazandous Materials Standands Organization Name/Dept US DO T CC Phonenumber 202-366-4482 Faxnumber 202-366 - 3012 From: Wes Ware Phone Number: 501-364-6429 Date sent G/ 1/04 Urgent. Time sent * 1200 CT For Review Number of pages induding cover page: 2 Please Comment MESSAGE I faxed this earlier and realized mn address coote to information was in completer please use this new.! letter. 4:37PM. . Jun. 1. 2004 ## Provenance - Official: Yes - Source: - Source ID: `phmsa` - SHA-256: `bf772983340cadf4f378826c6414094d47be3927df72d7080d070499f12b6b24` - Retrieved: 2026-08-20T00:59:31.977Z - Exported: 2026-08-23T15:44:39.605Z - Document slug: `phmsa-interpretation-04-0142` ### Source metadata ```json { "materialSubtype": "interpretation", "interpretationArea": "hazardous_materials", "representation": "full_text_from_official_pdf", "companies": [ "Arkansas Children\"s Hospital" ], "individuals": [ "Wes Ware" ], "refIds": [ "04-0142" ], "catalogDates": [ "2004-06-18" ], "catalogParts": [ 175 ], "catalogRowCount": 1, "sourceRecordUrls": [ "https://www.phmsa.dot.gov/node/58561" ], "linkedAttachmentUrls": [], "unavailableResponseUrls": [], "duplicateRepresentationUrls": [], "citedSections": [ "175.10", "175.1066" ], "catalogPageUrls": [ "https://www.phmsa.dot.gov/regulations/title49/section/17510" ], "pdfUrls": [ "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2004/040142.pdf" ], "representations": [ { "viewUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2004/040142.pdf", "detailUrl": null, "detailHtmlPath": null, "pdfUrl": "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2004/040142.pdf", "pdfArtifactPath": "data/sources/phmsa-interpretations/04-0142-b8b34a31cc.pdf", "pdfArtifactSha256": "28daa4531328f8afa9ea19c7fe0ade1bc002fb2255179379059d1ec5dd3c609b", "extractedTextPath": "data/sources/phmsa-interpretations/04-0142-b8b34a31cc.v2.txt", "extractedTextSha256": "f706fa6b7a96e0462d1f0581cc86dc4fc895c0a842e6e7944303c4bdefc0a652", "pageCount": 3, "extractionVersion": 2 } ], "caveat": "Interpretations apply regulations to the facts presented and do not create independently enforceable requirements.", "jurisdiction": "US" } ```