anti-caking agent INS 553(i)

Magnesium Silicate (talc-free) E553a

carrier, release agent — Primarily synthetic.

🇪🇺 EU: Approved

🇺🇸 USA: Approved

🇯🇵 Japan: Approved

🇦🇺 AU/NZ: Approved

🇨🇦 Canada: Approved

Scientific Name

Magnesium silicate (Mg2SiO4, MgSiO3, and related forms)

CAS: 1343-88-0

Data verified: 2026-04-04

Factual Regulatory Reference

This database provides factual regulatory information compiled from official government sources. It does not constitute medical, nutritional, or safety advice. Regulatory status varies by country and is subject to change. Always refer to your local regulatory authority for the most current information.

? Did You Know?

Magnesium Silicate (talc-free) occurs naturally in Various magnesium silicate minerals (olivine, enstatite) and Not talc - E553a is specifically talc-free synthetic form. Many people consume it daily without realizing it's also a listed food additive.

Beyond food, Magnesium Silicate (talc-free) is also used in cosmetics, medicine, industrial applications, household products. Its versatility makes it one of the most multi-purpose chemical compounds in everyday life.

In the EU, Magnesium Silicate (talc-free) has a "quantum satis" authorization — Latin for "as much as needed." This means there's no specific maximum limit; manufacturers use only what's technologically necessary.

Detailed Regulatory Assessment

🇪🇺

European Union (EFSA)

approved Max: quantum satis mg/kg

Permitted as anti-caking agent and carrier. Must be talc-free synthetic form.

Official EFSA Link

🇺🇸

United States (FDA)

approved GRAS

Synthetic magnesium silicate, distinct from talc.

🇯🇵

Japan (MHLW)

approved Cat: 指定添加物

Compliant with Japanese food sanitation law.

Acceptable Daily Intake (ADI)

International Standard (JECFA)

not specified (acceptable for use)

mg/kg body weight per day

European Standard (EFSA)

not specified (no safety concern at current use levels)

Natural Occurrence

E553a is synthetic magnesium silicate, distinct from talc (E553b). It's manufactured to be pure and free from potential contaminants found in natural talc.

Various magnesium silicate minerals (olivine, enstatite)Not talc - E553a is specifically talc-free synthetic form

Manufacturing

Method: chemical synthesis

Produced by controlled precipitation of magnesium and silicate salts, or by reacting magnesium oxide with silicon dioxide. The synthetic process ensures purity and absence of asbestos contamination (a concern with natural talc).

Applications Beyond Food

Cosmetics

Absorbent, bulking agent, texture enhancer.

Medical

Antacid (magnesium trisilicate), tablet glidant and disintegrant.

Industrial

Ceramics, refractories, insulation.

Household

Not typically used.

Frequently Asked Questions

What is Magnesium Silicate (talc-free) (E553a)?

Magnesium Silicate (talc-free) (E553a) is a anti-caking agent used in food products. It is carrier, release agent and synthetic. E553a is synthetic magnesium silicate, distinct from talc (E553b). It's manufactured to be pure and free from potential contaminants found in natural talc.

Where is Magnesium Silicate (talc-free) found naturally?

Magnesium Silicate (talc-free) is naturally found in Various magnesium silicate minerals (olivine, enstatite), Not talc - E553a is specifically talc-free synthetic form. E553a is synthetic magnesium silicate, distinct from talc (E553b). It's manufactured to be pure and free from potential contaminants found in natural talc.

What is the ADI for Magnesium Silicate (talc-free)?

The Acceptable Daily Intake (ADI) for Magnesium Silicate (talc-free) is not specified (acceptable for use) as established by JECFA (Joint FAO/WHO Expert Committee on Food Additives). ADI represents the amount that can be consumed daily over a lifetime without appreciable health risk.

What foods contain Magnesium Silicate (talc-free)?

Magnesium Silicate (talc-free) is used in various food categories including Table salt and salt substitutes, Confectionery. It is used as a anti-caking agent in these products.

Is Magnesium Silicate (talc-free) the same as Synthetic magnesium silicate?

Yes, Magnesium Silicate (talc-free) is also known as Synthetic magnesium silicate, Magnesium trisilicate (pharmaceutical grade). These are different names for the same substance.