Defoaming agents
9003-11-6 · Polyethylene-polypropylene glycol · Defoaming agentsCAS 9003-11-6
This listing covers the substances added to stop foam during processing. Foam slows filling lines and boils over in evaporators, so a defoamer is often what makes a process run at all.
Where it is and isn’t permitted
| Jurisdiction | Status | Scope and limits | Citation |
|---|---|---|---|
| United States | Permitted, with conditions | 21 CFR 173.340retrieved 2026-09-07 | |
| Codex Alimentarius | Not listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited. |
What it is made from
A group including silicones, fatty acid esters and waxes. Some components may be animal-derived, and the blend is not itemised.
- Vegan status depends on the source
- Vegetarian status depends on the source
- May raise a halal question
- May raise a kosher question
This is not an omission. What this additive is made from is not fixed — depending on the manufacturer it may be plant, animal or microbial in origin, nobody is required to say which, and the same product can change source between production runs. Ask the manufacturer if it matters to you; a label cannot answer it.
- CAS registry number
- 9003-11-6
Every name it appears under
3 recorded names. A label may use any of them.
CAS registry number
- 9003-11-6
As it appears in regulation
- Defoaming agents
Other names
- Polyethylene-polypropylene glycol
Hazard reference values
No reference value for this substance in the sources we hold.
Evidence and how bodies read it
Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.
Sources for this page
- ecfr retrieved 2026-09-07
Full licence terms and publisher details on Sources. How this page is built and updated: Method.
Machine-readable:/api/v1/additives/defoaming-agents.json