Diammonium Hydrogen Phosphate (Ammonium Phosphate, Dibasic) リン酸水素二アンモニウム（別名リン酸二アンモニウム）

In Japan

• The ammonium salt of phosphoric acid, used as a nutrient source for yeast in making bread and similar foods.
• No individual standards for use are listed in the list of standards for use.
• It falls within the range of the group name “イーストフード” (yeast food), and in processed cheese products it is also treated as an emulsifier. The simplified name is “リン酸アンモニウム” (ammonium phosphate).

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 not on the EU list of food additives (Regulation (EC) No 1333/2008, Annex II), so it cannot be used as a food additive in the EU.
• The EU's phosphate additives (E338–E341, E343, E450–E452) do not include ammonium phosphate.

When it is labeled under a shared name

Diammonium Hydrogen Phosphate (Ammonium Phosphate, Dibasic) may be declared on the label in the same way as “イーストフード”. See Yeast food (dough conditioner) 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
• 消費者庁 食品表示基準Q&A 別添 添加物関係（簡略名・用途名併記・一括名・栄養強化の範囲） (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.

Other substances used as yeast food

• Ammonium Dihydrogen Phosphate (Ammonium Phosphate, Monobasic)