Ammonium persulfate

CAS 7727-54-0

Listed as a preservative and a flour treatment agent by the US and Canada.

Listed as preservatives (US) · flour treatment agents (CA)
Chemical structure of Ammonium persulfate, from PubChem compound 62648
Structure from PubChem CID 62648 (National Library of Medicine, public domain). A depiction of one compound: where a listing covers a family, or a substance has no single structure, this page shows none.

A strong oxidant used in flour treatment and in starch modification. Like the other persulfates it is meant to react and be consumed, not to remain in the food.

Where it is and isn’t permitted

Status of Ammonium persulfate by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
Australia and New ZealandFood Standards Australia New ZealandNo 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.
CanadaHealth CanadaPermitted, with conditions

highest permitted level 1,000 mg/kg

4 permitted uses

Show every permitted use
  • In: Bread. Purpose: Flour treatment agent. Limit: If used singly, the amount not to exceed 100 ppm of the flour. If used in combination with calcium peroxide or potassium persulphate, or both, the total combined amount not to exceed 100 ppm of the flour. — Health Canada, List of Permitted Flour Treatment Agents (List 2), item A.2(a)
  • In: Unstandardized bakery products. Purpose: Flour treatment agent. Limit: Good Manufacturing Practice. — Health Canada, List of Permitted Flour Treatment Agents (List 2), item A.2(b)
  • In: White flour; Whole wheat flour. Purpose: Flour treatment agent. Limit: 250 ppm. — Health Canada, List of Permitted Flour Treatment Agents (List 2), item A.2(c)
  • In: Brewer's yeast. Purpose: Antimicrobial agent. Limit: 1,000 ppm. — Health Canada, List of Permitted Food Additives with Other Purposes of Use (List 8), item A.6
Health Canadaand 3 further provisionsretrieved 2026-10-17
European UnionEuropean Commission / EFSANo 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 BritainFood Standards Agency / Food Standards ScotlandNo 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.
JapanConsumer Affairs AgencyPermitted, with conditions
Designated additive: Appended Table 1, item 102, 過硫酸アンモニウム (“Ammonium Persulfate” in the unofficial English translation). …

Designated additive: Appended Table 1, item 102, 過硫酸アンモニウム (“Ammonium Persulfate” in the unofficial English translation). Standards for use — Specifications and Standards for Foods, Food Additives, etc. (MHW Notification No. 370 of 1959), Part II (Food Additives), F (Standards for use), entry 過硫酸アンモニウム: (1) [may be used only in the foods stated] “過硫酸アンモニウムは、小麦粉以外の食品に使用してはならない。” (2) [sets maximum levels of use for the foods stated] “過硫酸アンモニウムの使用量は、過硫酸アンモニウムとして、小麦粉1kgにつき0.30g以下でなければならない。” The Japanese is the standard as published. There is no official English translation of the Notification; the English in square brackets is this site’s description of what each sentence does, not a translation of the foods or the levels. Compositional specifications for this additive, in the same Notification, are not imported and are not shown here; nor are the general rules in F 添加物一般, which apply to every additive.

Regulations for Enforcement of the Food Sanitation Act (MHW Ordinance No. 23 of 1948), Appended Table 1retrieved 2026-10-18
South KoreaMinistry of Food and Drug SafetyPermitted, with conditions
Designated food additive: Standards and Specifications for Food Additives, Part III, 1. …

Designated food additive: Standards and Specifications for Food Additives, Part III, 1. 일반식품첨가물 (general food additives), 과황산암모늄 (“Ammonium Persulfate”, the English the Code prints beside it). Main use (주용도) of 과황산암모늄: 밀가루개량제. Standard for use (사용기준) of 과황산암모늄: (1) [may be used only in the foods listed; sets a limit on the amount used] “과황산암모늄은 아래의 식품에 한하여 사용하여야 한다. 과황산암모늄의 사용량은 1. 밀가루류 : 0.3g/kg 이하” The Korean is the standard as published. There is no official English translation of the current Code (the English version on MFDS’s website is the 2020 edition and has no legal effect); the English in square brackets is this site’s description of what each sentence does, not a translation of the foods or the levels. Compositional specifications (Part IV) are not imported, nor are the general standards in Part II, which apply to every additive.

Standards and Specifications for Food Additives (식품첨가물의 기준 및 규격), MFDS Notification, Part III (Standards for use, by item)retrieved 2026-10-18
United StatesFood and Drug AdministrationNot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.
Codex AlimentariusCodex Alimentarius Commission / JECFANot 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.

Canada250 mg/kg – 1,000 mg/kg2 numeric limit, 1 GMP, 1 no quantity stated
Japan—1 no quantity stated
South Korea—1 no quantity stated

What it is made from

Made by electrolysing ammonium sulfate solution.

  • Vegan
  • Vegetarian

Compare other additives on the dietary indexes.

CAS registry number
7727-54-0
InChIKey
ROOXNKNUYICQNP-UHFFFAOYSA-N
PubChem
CID 62648

Every name it appears under

24 recorded names. A label may use any of them.

CAS registry number

  • 7727-54-0

Other names

  • ammonium per sulphate
  • ammonium peroxidisulfate
  • Ammonium peroxodisulfate
  • Ammonium peroxydisulfate
  • Ammonium peroxydisulfate, Electrophoresis Grade
  • Ammonium peroxydisulphate
  • Ammonium Peroxysulfate
  • ammonium persuiphate
  • Ammonium persulfate
  • Ammonium persulfate pound APS pound(c)
  • AMMONIUM PERSULFATE, ACS
  • Ammonium Persulphate
  • ammonium persulphate-d8
  • APS Solution
  • Bis(Ammonium) Peroxodisulfate
  • Diammonium peroxydisulfate
  • Diammonium peroxydisulphate
  • Diammonium Persulfate
  • diazanium;sulfonatooxy sulfate
  • Epitope ID:1309331
  • Peroxydisulfuric acid (((HO)S(O)2)2O2), ammonium salt (1:2)
  • Peroxydisulfuric Acid, Diammonium Salt
  • Persulfate d'ammonium

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 Ammonium persulfate?
A strong oxidant used in flour treatment and in starch modification. Like the other persulfates it is meant to react and be consumed, not to remain in the food.
What is Ammonium persulfate used for in food?
It is listed as a preservative and a flour treatment agent — the role the US and Canada assign it. This page shows every function each regulator records, with the citation for each.
Where is Ammonium persulfate permitted?
Of the seven regulators this site reads, Canada, Japan and South Korea 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 Ammonium persulfate vegan?
Yes. Ammonium persulfate is not derived from animals, and is suitable for vegetarians. This page says what it is made from and how.

Sources for this page

  • ca retrieved 2026-10-17
  • jp retrieved 2026-10-18
  • kr retrieved 2026-10-18

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable: a JSON record of this additive is given on request —how to ask for access.

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