Food additive databaseprocessing agentChecked 2026-10-02

Magnesium Stearate ステアリン酸マグネシウム

Designated additivePermitted in the EU (E470b)

Purpose: processing agent
On the label: “ステアリン酸Mg” (magnesium stearate, short name), “ステアリン酸マグネシウム” (magnesium stearate), “ステアリン酸塩（Ca，Mg）” (stearates (Ca, Mg))
Name in the List of Designated Additives: ステアリン酸マグネシウム (No. 238)

In Japan

Under the standards for use, it can be used only in foods not in ordinary food form, such as capsules and tablets, and in tablet confectionery.
When written by substance name, the short name “ステアリン酸Mg” (magnesium stearate) can be used. When used together with calcium stearate, the two can be written together as “ステアリン酸塩（Ca，Mg）” (stearates (Ca, Mg)).

Japan's standards for use

Must not be used in any food other than foods not in ordinary food form, such as capsules and tablets, and tablet confectionery

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 E470b.

Sources

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.

Other substances used as processing agent

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