Octafluorocyclobutane
115-25-3 · 25510-99-0 · 1,1,2,2,3,3,4,4-Octafluoro-Cyclobutane · 1,1,2,2,3,3,4,4-Octafluorocyclobutane · 1,1,2,2,3,3,4,4-Octafluorocyclobutane # · Cyclobutane, 1,1,2,2,3,3,4,4-octafluoro- · Cyclobutane, octafluoro- · Cyclooctafluorobutane · FKWC 318 · FLON C 318 · Fluorocarbon C-318 · Freon 318 · Freon C 318 · Freon C-318 · freon c318 · FRON C 318 · Halocarbon C-138 · octafluoro-cyclobutane · Octafluorocyclobutane · Octafluorocyclobutane, or Refrigerant gas R C318 · PERFLUOROCYCLOBUTANE · Perfluorocyclobutane (PFC C-318) · Perfluorocyclobutane; 99%" · Propellant C 318 · Propellant C318 · E946 · OctafluorocyclobutaneCAS 115-25-3
Listed as a propellant by Canada and the US.
Listed as propellants and aerating agents (CA, US)
- Canada: Aerating agent and pressure dispensing agent — Health Canada, List of Permitted Food Additives with Other Purposes of Use (List 8)
- United States: Propellant — FDA, Substances Added to Food: OCTAFLUOROCYCLOBUTANE
Octafluorocyclobutane is a propellant for foamed and sprayed food products.
Where it is and isn’t permitted
| Jurisdiction | Status | Scope and limits | Citation |
|---|---|---|---|
| Australia and New Zealand | Permitted, with conditions | 54 food categories no numerical limit (good manufacturing practice) Show every food category
| Food Standards Code, Schedule 15, S15—5and 53 further provisionsretrieved 2026-10-17 |
| Canada | Permitted | no numerical limit (good manufacturing practice) In: Unstandardized foods. Purpose: Aerating agent and pressure dispensing agent. Limit: Good Manufacturing Practice. | Health Canada, List of Permitted Food Additives with Other Purposes of Use (List 8), item O.1retrieved 2026-10-17 |
| European Union | No listed food uses foundThis site has not matched this substance to any food use on this jurisdiction’s list of authorised food additives. A food additive may be used only in foods that list names. Flavourings, enzymes, processing aids and added nutrients are regulated separately and do not appear on it. | ||
| Great Britain | No listed food uses foundThis site has not matched this substance to any food use on this jurisdiction’s list of authorised food additives. A food additive may be used only in foods that list names. Flavourings, enzymes, processing aids and added nutrients are regulated separately and do not appear on it. | ||
| Japan | No listing matchedThis site imports only Japan’s list of designated additives (Appended Table 1 to the Regulations for Enforcement of the Food Sanitation Act), matched by English name. Existing additives, natural flavouring agents and ordinary foods used as additives are permitted outside that list and are not imported, so an empty row does not show that Japan does not permit the substance. | ||
| South Korea | No listing matchedThis site imports Part III of South Korea’s Standards and Specifications for Food Additives, matched by CAS number, then INS number, then exact name. Mixed preparations and sanitisers are not imported, and an entry whose identifiers disagreed with a page’s is held for review, so an empty row does not show that South Korea does not permit the substance. | ||
| United States | Permitted, with conditions | 21 CFR 173.360retrieved 2026-10-17 | |
| Codex Alimentarius | Not listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited. |
How much is permitted
A listing usually limits the quantity as well as the food. Only one of the forms that takes is a figure: quantum satis and good manufacturing practice permit the amount the technological effect requires and no more, which is a limit rather than the absence of one. Figures below are the range across every food category this page is listed in, and categories differ between regulators — see how much is permitted.
| Australia and New Zealand | — | 54 GMP |
|---|---|---|
| Canada | — | 1 GMP |
| United States | — | 1 no quantity stated |
No regulator sets a figure for Octafluorocyclobutane. That is not an absence of control: where the listing says quantum satis or good manufacturing practice, the quantity is limited to what the effect requires.
What it is made from
Produced by fluorinating hydrocarbons.
- Vegan
- Vegetarian
Compare other additives on the dietary indexes.
- CAS registry number
- 115-25-3
- InChIKey
- BCCOBQSFUDVTJQ-UHFFFAOYSA-N
- PubChem
- CID 8263
Every name it appears under
27 recorded names. A label may use any of them.
E number
- E946
CAS registry number
- 115-25-3
- 25510-99-0
As it appears in regulation
- Octafluorocyclobutane
Other names
- 1,1,2,2,3,3,4,4-Octafluoro-Cyclobutane
- 1,1,2,2,3,3,4,4-Octafluorocyclobutane
- 1,1,2,2,3,3,4,4-Octafluorocyclobutane #
- Cyclobutane, 1,1,2,2,3,3,4,4-octafluoro-
- Cyclobutane, octafluoro-
- Cyclooctafluorobutane
- FKWC 318
- FLON C 318
- Fluorocarbon C-318
- Freon 318
- Freon C 318
- Freon C-318
- freon c318
- FRON C 318
- Halocarbon C-138
- octafluoro-cyclobutane
- Octafluorocyclobutane
- Octafluorocyclobutane, or Refrigerant gas R C318
- PERFLUOROCYCLOBUTANE
- Perfluorocyclobutane (PFC C-318)
- Perfluorocyclobutane; 99%"
- Propellant C 318
- Propellant C318
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 rather than machine-read, and none has been written for this substance yet.
Common questions
Assembled from what is above, in the words the questions are usually asked in. Each answer is the same statement the relevant section makes, with the same citations behind it.
- What is Octafluorocyclobutane?
- Octafluorocyclobutane is a propellant for foamed and sprayed food products.
- What is Octafluorocyclobutane used for in food?
- It is listed as a propellant — the role Canada and the US assign it. This page shows every function each regulator records, with the citation for each.
- Is Octafluorocyclobutane banned in Europe?
- No. Octafluorocyclobutane does not appear on the EU's list of authorised food additives, which is not the same as being banned: the EU permits an additive only where it has authorised it, and usually the reason for an absence is that no one applied. The EU has made no finding against this substance. It does mean it may not be used as a food additive in the EU today.
- Where is Octafluorocyclobutane permitted?
- Of the seven regulators this site reads, Australia and New Zealand, Canada and the US permit it. Each permission is for named foods at named levels, not a blanket one; the table on this page gives them with citations.
- Is Octafluorocyclobutane vegan?
- Yes. Octafluorocyclobutane is not derived from animals, and is suitable for vegetarians. This page says what it is made from and how.
Sources for this page
- anz retrieved 2026-10-17
- ca retrieved 2026-10-17
- ecfr retrieved 2026-10-17
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