---
kind: "section"
citation: "49 C.F.R. § 173.434"
title: "49"
number: "173.434"
heading: "Activity-mass relationships for uranium and natural thorium."
url: "https://uscodex.org/cfr/49/173.434"
---

# §173.434. Activity-mass relationships for uranium and natural thorium.


The table of activity-mass relationships for uranium and natural thorium are as follows:


## Notes

### Amendments

[Amdt. 173-244, 60 FR 50307, Sept. 28, 1995, as amended by 63 FR 52849, Oct. 1, 1998]

### Source

Source: Amdt. 173-244, 60 FR 50307, Sept. 28, 1995, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 5101-5128, 44701; 49 CFR 1.81, 1.96 and 1.97.

### Amendments

[Amdt. 173-244, 60 FR 50307, Sept. 28, 1995, as amended by 63 FR 52849, Oct. 1, 1998]