# Separation distances for undeveloped film from packages containing Class 7 (radioactive) materials.

- **operation:** document
- **citation:** 49 CFR 175.706
- **title:** Separation distances for undeveloped film from packages containing Class 7 (radioactive) materials.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-08-18
- **summary:** No person may carry in an aircraft any package of Class 7 (radioactive) materials required by § 172.403 of this subchapter to be labeled Radioactive Yellow-II or Radioactive Yellow-III closer than the distances shown in the table below to any package marked as containing underdeveloped film.

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- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-175.706
**body:**

No person may carry in an aircraft any package of Class 7 (radioactive) materials required by § 172.403 of this subchapter to be labeled Radioactive Yellow-II or Radioactive Yellow-III closer than the distances shown in the table below to any package marked as containing underdeveloped film.

Transport index Minimum separation distance to nearest undeveloped film for various times in transit Up to 2 hours 2 to 4 hours 4 to 8 hours 8 to 12 hours Over 12 hours Meters Feet Meters Feet Meters Feet Meters Feet Meters Feet 0.1 to 1.0 0.3 1 0.6 2 0.9 3 1.2 4 1.5 5 1.1 to 5.0 0.9 3 1.2 4 1.8 6 2.4 8 3.3 11 5.1 to 10.0 1.2 4 1.8 6 2.7 9 3.3 11 4.5 15 10.1 to 20.0 1.5 5 2.4 8 3.6 12 4.8 16 6.6 22 20.1 to 30.0 2.1 7 3 10 4.5 15 6 20 8.7 29 30.1 to 40.0 2.4 8 3.3 11 5.1 17 6.6 22 9.9 33 40.1 to 50.0 2.7 9 3.6 12 5.7 19 7.2 24 10.8 36
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