# Curdlan — Food additive regulatory approval status — US FDA vs EU

For Curdlan, jurisdiction is US FDA (21 CFR 172–178); status is permitted; citation is 21 CFR 172.809; use conditions is in accordance with the following conditions:   ( a ) Curdlan is a high molecular weight polymer of glucose (β-1,3-glucan; CAS Reg; cas no. is 54724-00-4, recorded from its source on 2026-08-15.

- **Additive:** Curdlan _(verified: appears in the quote below)_
- **Jurisdiction:** US FDA (21 CFR 172–178) _(our reading, not quoted from the source)_
- **Status:** permitted _(our reading, not quoted from the source)_
- **Citation:** 21 CFR 172.809 _(our reading, not quoted from the source)_
- **Use conditions:** in accordance with the following conditions:   ( a ) Curdlan is a high molecular weight polymer of glucose (β-1,3-glucan; CAS Reg. _(verified: appears in the quote below)_
- **CAS No.:** 54724-00-4 _(verified: appears in the quote below)_

## What the source says

> § 172.809 Curdlan. Curdlan may be safely used in accordance with the following conditions: ( a ) Curdlan is a high molecular weight polymer of glucose (β-1,3-glucan; CAS Reg. No. 54724-00-4) produced by pure culture fermentation from the nonpathogenic and nontoxicogenic bacterium Alcaligenes faecalis var. myxogenes.

## Source

- https://www.ecfr.gov/current/title-21/chapter-I/subchapter-B/part-172

Last verified: 2026-08-15. Review by: 2027-08-15.
Part of [Food additive regulatory approval status — US FDA vs EU](https://referencesource.org/food-additive-approval-status-us-vs-eu/).