---
kind: "section"
citation: "21 C.F.R. § 573.520"
title: "21"
number: "573.520"
heading: "Hemicellulose extract."
url: "https://uscodex.org/cfr/21/573.520"
---

# §573.520. Hemicellulose extract.


Hemicellulose extract may be safely used in animal feed when incorporated therein in accordance with the following conditions:

- (a) The additive is produced from the aqueous extract obtained by the treatment of wood with water at elevated temperatures (325 degrees-535 degrees F) and pressure (80 to 900 pounds per square inch) and contains primarily pentose and hexose sugars.
- (b) The additive may be used in a liquid or dry state with the liquid product containing not less than 55 percent carbohydrate and the dry product containing not less than 84 percent carbohydrate.
- (c) The additive is used as a source of metabolizable energy in animal feed in accordance with good manufacturing and feeding practices.

## Notes

### Amendments

[41 FR 38652, Sept. 10, 1976, as amended at 43 FR 11181, Mar. 17, 1978]

### Authority

Authority: 21 U.S.C. 321, 342, 348.

### Source

Source: 41 FR 38652, Sept. 10, 1976, unless otherwise noted.

### Amendments

[41 FR 38652, Sept. 10, 1976, as amended at 43 FR 11181, Mar. 17, 1978]