Food additive databaseleavening agent, pH adjuster, kansui, emulsifierChecked 2026-10-02
Disodium Dihydrogen Pyrophosphate (Acid Disodium Pyrophosphate) ピロリン酸二水素二ナトリウム（別名酸性ピロリン酸ナトリウム）
Designated additivePermitted in the EU (E450(i))EFSA ADI 40mg per kg body weight per day
- Purpose
- leavening agent, pH adjuster, kansui, emulsifier
- On the label
- “ピロリン酸Na” (sodium pyrophosphate), “酸性ピロリン酸Na” (acid sodium pyrophosphate), “リン酸塩（Na）” (phosphates (Na)), “膨張剤” (leavening agent), “pH調整剤” (pH adjuster), “かんすい” (kansui, alkaline noodle agent)
- Name in the List of Designated Additives
- ピロリン酸二水素二ナトリウム（別名酸性ピロリン酸ナトリウム） (No. 343)
In Japan
- One of the phosphate salts (also called acid sodium pyrophosphate). Under the Food Labeling Standards, it is among the additives that can be labeled under the respective group names when used as a leavening agent, a pH adjuster, kansui (alkaline agent) for Chinese noodles, or an emulsifier for processed cheese.
- No standards for use (limits on which foods it can be used in and how much) have been set.
- When written by substance name, the short names “ピロリン酸ナトリウム” (sodium pyrophosphate) and “ピロリン酸Na” can be used, and when used together with other phosphates, they can be written together, as in “リン酸塩（Na）” (phosphates (Na)).
Japan's standards for use
There are no standards for use that limit which foods or how much (the general standards for all additives still apply).
This is a summary of the standards for use. See the source list for the exact conditions.
In the EU
- It is on the EU list of food additives (Regulation (EC) No 1333/2008, Annex II) as E450(i).
- The EFSA group ADI for phosphates (40 mg per kg of body weight per day) is expressed as the amount converted to phosphorus.
- In its 2019 evaluation, EFSA (the European Food Safety Authority) set an ADI (acceptable daily intake) of 40mg per kg of body weight per day (a group ADI, for the total of related substances) (EFSA FAF).
When it is labeled under a shared name
Disodium Dihydrogen Pyrophosphate (Acid Disodium Pyrophosphate) may be declared on the label in the same way as “リン酸塩”. See Phosphates for details.
Sources
- List of Designated Additives — Japan Food Chemical Research Foundation (Japanese)
- Standards for use and storage of each additive — Japan Food Chemical Research Foundation (Japanese)
- EU food additive database (Japanese translation) — MAFF (Japanese)
- Regulation (EC) No 1333/2008 on food additives — EUR-Lex
- EFSA OpenFoodTox (chemical hazards database)
- 消費者庁「食品表示基準について」別添 添加物関係（簡略名・類別名一覧、用途名併記の例示、一括名の範囲、栄養強化の範囲ほか） (Japanese)
- EFSA FAF Panel (2019) Re-evaluation of phosphoric acid–phosphates – di-, tri- and polyphosphates (E 338–341, E 343, E 450–452) as food additives (Japanese)
Checked 2026-10-02. Rules and evaluations change over time. This page is a translation of our Japanese page; if they differ, the Japanese page is the reference.
This page lists facts stated in laws and in evaluations by public bodies; it is not a safety verdict. Additives used in Japan are approved by the government, which sets the foods and amounts they can be used in. The ADI is a guide to the amount that is considered safe to take every day over a lifetime.