E556 / Acidity regulators & anti-caking agents
Calcium aluminum silicate
Safety in brief
Safe
Recorded EatMatrix rating, not a new clinical review. The amount, your sensitivities and country rules still matter.
EU food-use restriction: The Part B footnote states that authorisation lasted until 31 January 2014. This historical entry is not a current food-use permission. Read the rule.
- Watch for
- No allergen or sensitivity is recorded for this ingredient here. Check the whole product label; this is not an allergen-free guarantee.
- Our advice
- Read the whole food label and consider how often you eat the product. A name or E number does not tell you the amount, and an ingredient rating cannot assess the entire food.
What it is
Calcium aluminum silicate is a mineral compound used as an anticaking agent in powdered foods like salt and spices. As with other aluminum-containing additives, it contributes to overall dietary aluminum exposure, which EFSA advises limiting due to potential nervous-system and reproductive effects observed in animal studies at high cumulative intake. It is permitted at approved food-use levels by EFSA and the FDA.
Also appears on labels as: Calcium aluminum silicate, Calcium aluminosilicate, Aluminum calcium silicate, E556, E 556, E-556, Food grade calcium aluminum silicate, Calcium aluminum silicate powder, Anticaking agent calcium aluminum silicate, Aluminosilicate calcium, Calcium aluminum silicate additive, INS 556.
Dietary information
- Vegan
- Yes
- Halal
- Yes
- Gluten-free
- Yes
- Allergens
- None recorded
Recorded ingredient information. Check the product label or certification: sources, other ingredients and cross-contact can vary.
Research & body effects
Health notes from our ingredient record
- Contributes to total dietary aluminum exposure; EFSA has set a tolerable weekly intake for aluminum due to potential neurological and reproductive effects in animal studies.
- Not a significant concern from typical anticaking-agent use levels in a single food.
Country rules
Country checks for E556
Permission depends on the market, type of food, amount and conditions. A scientific opinion or an E-number alone does not establish a legal use. These checks are separate from the stored EatMatrix rating.
EU food-use restriction: The Part B footnote states that authorisation lasted until 31 January 2014. This historical entry is not a current food-use permission. Read the dated EU list and footnote.
Compare all eight markets and their sources
| Market | What is checked |
|---|---|
| European Union | Regulation (EC) 1333/2008, Annex II Part B, version , contains the exact code E556: Calcium aluminium silicate. The Part B footnote states that authorisation lasted until 31 January 2014. This historical entry is not a current food-use permission. Listing alone does not allow every food use. Part E food categories, limits, specifications and applicable later acts still need a product-specific check. Source read: . |
| Great Britain | The FSA register record for E556 ((Revoked) Calcium aluminium silicate) lists “Revoked” in England, Scotland and Wales. The period of application expired on 31 January 2014. Register updated: 01 April 2025; record checked: . Food-specific conditions and specifications still need a separate legal check. |
| United States | Complete current-use review pending. Any scoped provision in the label guide above applies only to the stated use. FDA explains the applicable food-additive and GRAS framework. |
| Northern Ireland | Review pending. Check the applicable EU rules and territory arrangements; the GB register alone does not establish this status. FSA guidance is a starting source, not a verified permission for this entry. |
| Canada | No exact named entry located in the reviewed additive lists No exact named food-additive entry was located in the 15 current lists for Calcium Aluminum Silicate; Calcium Aluminium Silicate. A name in the synonym glossary does not establish a current food-use row. EatMatrix reading: Do not claim a permitted additive use from this review. Exact preparation, intended use and any applicable separate legal provision need confirmation; this table result is not a toxicology verdict or proof of a universal ban. Name and category review: . This describes the legal source check, not a finding that the ingredient is safe, unsafe or untested. Sources and names checkedNames checked: Calcium aluminum silicate; Calcium Aluminum Silicate; Calcium Aluminium Silicate. All 15 Health Canada permitted-additive lists were checked by exact name, with the reviewed alternatives above. E-numbers alone are not Canadian ingredient names. The Justice Canada consolidation read was current to 21 September 2026. A complete product decision also requires its composition, specifications, intended food and use, quantities, applicable separate provisions and any later changes. |
| Australia | Review pending. Food Standards Code permissions and conditions need an additive-specific check. FSANZ food-additive rules is a starting source, not a verified permission for this entry. |
| New Zealand | Review pending. Food Standards Code permissions and conditions need an additive-specific check. FSANZ food-additive rules is a starting source, not a verified permission for this entry. |
| Japan | Review pending. The relevant list, identity and use standards need an additive-specific check. CAA food-additive lists is a starting source, not a verified permission for this entry. |
Sources & review status
Check what each source covers: an authority’s conclusion, a research finding and a country’s legal permission answer different questions.
What this guide covers
- Original ingredient record
- No research links in the original record. Sources added separately to this guide are not included in this count.
This guide brings together our ingredient record and the dated sources shown here. Missing information describes a gap in this guide; it does not mean an ingredient is untested, safe or harmful. This is not a complete review of every study, preparation or current country rule. The amount in a product and how it is used still matter.
How to read the ratings, research and country checksAgency labels recorded by EatMatrix
These are imported database classifications, not verified current statements from each authority. Use the dated official sources below for their actual scope and conclusions.
| Authority | Database label |
|---|---|
| FDA | Safe |
| WHO | Safe |
| EFSA | Safe |
| FSANZ | Safe |
| Japan | Safe |
| UK FSA | Safe |
| Health Canada | Safe |
Database updated: . What does an E number mean on a food label?
Common questions
Frequently asked questions
What is EatMatrix's recorded rating for E556?
The recorded EatMatrix rating for E556 (Calcium aluminum silicate) is “Safe”. It is calculated from labels stored in our ingredient database. These labels are not verified current regulator decisions or country permissions. A database update date is not a scientific review date.
Is E556 vegan, halal or gluten-free?
According to our ingredient data for Calcium aluminum silicate — vegan: yes, vegetarian: yes, halal: yes, kosher: yes, gluten-free: yes, dairy-free: yes. Manufacturing sources can vary between products; check the label if it matters to you.
What is E556 and why is it used?
Calcium aluminum silicate is a mineral compound used as an anticaking agent in powdered foods like salt and spices. As with other aluminum-containing additives, it contributes to overall dietary aluminum exposure, which EFSA advises limiting due to potential nervous-system and reproductive effects observed in animal studies at high cumulative intake. It is permitted at approved food-use levels by EFSA and the FDA.
Does E556 contain allergens?
No known allergens are recorded for Calcium aluminum silicate.
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This page shows information and classifications recorded in our ingredient database. Current scientific and market-specific verification remains pending as described above. It is general information, not medical advice.