日本語
Food additive databaseprocessing agentChecked 2026-10-02

Cristobalite クリストバル石

Existing food additiveNot on the EU additive list
Purpose
processing agent
On the label
“クリストバル石” (cristobalite), “不溶性鉱物性物質” (insoluble mineral substances) (when labeled)
Name in the List of Existing Food Additives
クリストバル石 (No. 94)
Source and production
Cristobalite mined from deposits, crushed, dried, and fired at 800 to 1200°C, or treated with hydrochloric acid and then fired.

In Japan

  • Cristobalite mined from deposits and fired at high temperature, used as a manufacturing agent. Under the standards for use, it can be used only when essential for manufacturing or processing, and the amount remaining in the food is up to 0.50%.
  • The short name is “不溶性鉱物性物質” (insoluble mineral substances). When it counts as a processing aid (for example, used in the manufacturing process and either not remaining in the final food or remaining only in tiny amounts with no effect), labeling is omitted (Food Labeling Standards).

Japan's standards for use

  • Must not be used except when essential for the manufacture or processing of food
  • Residue in food: up to 0.50% (when two or more insoluble mineral substances, such as acid clay, kaolin, bentonite, talc, perlite, and activated clay, are used, the total amount)

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.

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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