---
kind: "section"
citation: "40 C.F.R. § 716.50"
title: "40"
number: "716.50"
heading: "Reporting physical and chemical properties."
url: "https://uscodex.org/cfr/40/716.50"
---

# §716.50. Reporting physical and chemical properties.


Studies of physical and chemical properties must be reported under this subpart if performed for the purpose of determining the environmental or biological fate of a substance, and only if they investigated one or more of the following properties:

- (a) **Water solubility.**
- (b) Adsorption/desorption on particulate surfaces, e.g., soil.
- (c) **Vapor pressure.**
- (d) **Octanol/water partition coefficient.**
- (e) **Density/relative density (specific gravity).**
- (f) **Particle size distribution for insoluble solids.**
- (g) **Dissociation constant.**
- (h) **Degradation by photochemical mechanisms—** aquatic and atmospheric.
- (i) **Degradation by chemical mechanisms—** hydrolytic, reductive, and oxidative.
- (j) **Degradation by biological mechanisms—** aerobic and anaerobic.

## Notes

### Authority

Authority: 15 U.S.C. 2607(d).

### Source

Source: 51 FR 32726, Sept. 15, 1986, unless otherwise noted.