Arkema – Health Environment and Safety — Hazardous Materials Safety Interpretation

Page 11200 New Jersey Avenue, SE Washington, DC 20590 U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration October 7, 2022 Steve Schulte Arkema – Health Environment and Safety 900 First Ave., Building #2 King of Prussia, PA 19406 Reference No. 22-0080 Dear Mr. Schulte: This letter is in response to your May 16, 2022, letter requesting clarification of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) applicable to subsidiary labeling requirements for organic peroxides. Specifically, you ask whether your understanding is correct that a hazardous material—in your case “UN3103, Organic peroxide type C, liquid, 5.2, (tert- Butyl hydroperoxide, >79-90%)”—requires both a Division 5.2 hazard label and a Class 8 hazard label, when Column 8 (Notes) of the § 173.225 Table 1 to paragraph (c) - Organic Peroxide Table assigns a number “13.” Your understanding is correct. As indicated in § 173.225(c)(8), Column 8 specifies other applicable provisions, as set forth in the notes following the Table 1 to paragraph (c) - Organic Peroxide Table. Specifically, Note 13 states a corrosive subsidiary risk label is required. Therefore, any material listed in the table that is assigned “13” in Column 8 requires a Class 8 (corrosive) subsidiary hazard label, along with the primary hazard label. I hope this information is helpful. Please contact us if we can be of further assistance. Sincerely, Dirk Der Kinderen Chief, Standards Development Branch Standards and Rulemaking Division#

Page 2Baker 22-0080 From: Casey, Candace (PHMSA) To: Dodd, Alice (PHMSA) Subject: FW: Clarification Letter of Interpretation Note 13 Organic Peroxide Table 49 CFR 173.225 Date: Monday, August 8, 2022 3:15:51 PM Attachments: Clarification Organic Peroxide Table Note 13 49 CFR 173.225.docx Hi Alice, I think this interp was never assigned. Could you please log and assign it? Thank you! C From: INFOCNTR (PHMSA) <INFOCNTR.INFOCNTR@dot.gov> Sent: Tuesday, May 24, 2022 11:48 AM To: Dodd, Alice (PHMSA) <Alice.Dodd@dot.gov> Cc: Hazmat Interps <hazmatinterps@dot.gov> Subject: FW: Clarification Letter of Interpretation Note 13 Organic Peroxide Table 49 CFR 173.225 Hi Alice, Please see the attached interpretation request. Should you need anything, do not hesitate to reach out. Regards, -Breanna From: SCHULTE-EXT Steve <steve.schulte-ext@arkema.com> Sent: Monday, May 16, 2022 9:34 AM To: INFOCNTR (PHMSA) <INFOCNTR.INFOCNTR@dot.gov> Cc: KURTZ Christina <christina.kurtz@arkema.com> Subject: Clarification Letter of Interpretation Note 13 Organic Peroxide Table 49 CFR 173.225 CAUTION: This email originated from outside of the Department of Transportation (DOT). Do not click on links or open attachments unless you recognize the sender and know the content is safe. Dear Madam / Sir: Please find my request for a letter of interpretation attached. Regards, Steve Schulte, CHMM, CPP#

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