Food additive databasecolorChecked 2026-10-02

Food Blue No.2 (Indigo Carmine) and its Aluminum Lake 食用青色2号（別名インジゴカルミン）及びそのアルミニウムレーキ

Designated additivePermitted in the EU (E132)EFSA ADI 5mg per kg body weight per day

Purpose: color
On the label: “着色料（青2）” (coloring (Blue 2)), “着色料（青色2号）” (coloring (Blue No. 2)), “青色2号” (Blue No. 2), “食用青色2号” (Food Blue No. 2), “着色料（インジゴカルミン）” (coloring (indigo carmine))
Name in the List of Designated Additives: 食用青色2号（別名インジゴカルミン）及びそのアルミニウムレーキ (No. 227)

In Japan

A tar-based dye, a designated additive used to color food, also called indigo carmine. Under the standards for use, it may not be used in 18 kinds of food, including castella sponge cake (kasutera), soy sauce, miso, noodles, meat, fresh fish and shellfish, and vegetables (there is no upper limit on the amount for other foods).
Because it is a coloring, the purpose name must be written alongside. If the name contains the character “色”, as in “青色2号” (Blue No. 2), the word “着色料” (coloring) can be omitted, but with the short name “青2” (Blue 2) it is written “着色料（青2）” (coloring (Blue 2)) (Food Labeling Standards). The aluminum lake can also be written under names such as “青色2号”, “青2”, and “インジゴカルミン” (indigo carmine).

Japan's standards for use

Foods in which it may not be used: castella sponge cake (kasutera), roasted soybean flour (kinako), pickled fish, pickled whale meat, kelp (kombu), soy sauce, meat, pickled meat, sponge cake
Foods in which it may not be used (continued): fresh fish and shellfish (including whale meat), tea, nori (laver), marmalade, legumes, miso, noodles (including wonton), vegetables, wakame
For foods other than the above, no upper limit on the amount used is set
The same standards apply to the aluminum lake

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 E132.
Its name in the EU is Indigotine, Indigo carmine (E132).
In the EU, the foods in which it may be used and the maximum levels are set for each food category (Annex II, Part E). Japan's standards for use only specify foods in which it may not be used, and there is no upper limit on the amount.
In the EU, aluminum lakes may be used only in the food categories for which Annex II, Part E states a “limit on aluminum derived from the lake” (since August 2014; Annex II, Part A). In Japan, lakes can be used under the same standards for use as the dye.
In its 2014 evaluation, EFSA (the European Food Safety Authority) set an ADI (acceptable daily intake) of 5mg per kg of body weight per day (EFSA ANS).

When it is labeled under a shared name

Food Blue No.2 (Indigo Carmine) and its Aluminum Lake may be declared on the label in the same way as “合成着色料（タール色素）”. See Synthetic food colors (coal-tar dyes) for details.

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 color

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