Food Safety Substance
Magnesium hydroxideE528
Magnesium hydroxide (E528) is a food additive with PUBLISHED in the EU, GRAS in the US, and data from 8 regulatory sources.
CAS 1309-42-8
E528
Indexable evidence set
FDA
GRAS
ADI / TDI
ADI NOT LIMITED mg/kg bw
Codex
20 row(s)
SOURCE
D1 identity resolution
e number aliases | Food Additives | dsstox identifiers | 8 matched regulatory source group(s)
Substance Identity
Resolved identifiers used to render this food-safety record.
Substance name
Magnesium hydroxide
CAS
1309-42-8
E-number
E528
DTXSID
DTXSID4049662
PubChem CID
73981
Evidence tier
Indexable evidence set (14)
SOURCE
EU Commission
FDA | Health Canada | Codex Alimentarius
Multi-Jurisdiction Comparison
Side-by-side status rows for the same resolved substance across public food regulators.
| Jurisdiction | Authority | Status | Evidence |
|---|---|---|---|
| European Union | EU Commission | PUBLISHED | EU additive listing; Annex II entry |
| Canada | Health Canada | Listed | Acidity regulator |
| Codex | Codex Alimentarius | Listed | Acidity regulator; Anticaking agent; Carrier; Colour retention agent |
SOURCE
EU Commission
EU Food Additives | EU Food Additives Database
EU Food Additive Status
EU Commission food-additive listing rows from eu_food_additives.
| Jurisdiction | E-number | Status | Type | Name | Note |
|---|---|---|---|---|---|
| European Union | E528 | PUBLISHED | substanceFAD | Magnesium hydroxide | - |
SOURCE
EU Commission
EU Annex II Authorised | EU Food Additives Database
EU Annex II Authorised Uses
Authorised additive rows and use conditions from EU Annex II tables.
| Jurisdiction | E-number | Name | INS | Policy item | Note |
|---|---|---|---|---|---|
| European Union | E528 | Magnesium hydroxide | - | POL-FAD-IMPORT-3225 | - |
Conditions and restrictions
| Jurisdiction | Food category | Restriction | Comment | Source |
|---|---|---|---|---|
| European Union | 1.9 Edible caseinates | quantum satis | - | EU Food Additives Database |
SOURCE
Codex Alimentarius
Codex GSFA
Codex GSFA Status
Codex Alimentarius GSFA permissions and maximum-use rows.
| Jurisdiction | INS / E-number | Function | Food category | Max level | Notes |
|---|---|---|---|---|---|
| Codex | 504(ii) | Acidity regulator; Anticaking agent; Carrier; Colour retention agent | 01.1.3.2 Fluid buttermilk (plain) | GMP | For use in heat-treated buttermilk only. |
| Codex | 504(ii) | Acidity regulator; Anticaking agent; Carrier; Colour retention agent | 01.2.1.2 Fermented milks (plain), heat-treated after fermentation | GMP | Except for use in plain fermented milks and drinks based on fermented milks that are heat treated after fermentation conforming to the Standard for Fermented Milks (CXS 243-2003)... |
| Codex | 504(ii) | Acidity regulator; Anticaking agent; Carrier; Colour retention agent | 01.5.1 Milk powder and cream powder (plain) | GMP | For use in products conforming to the Standard for Edible Casein Products (CXS 290-1995) as an acidity regulator. |
| Codex | 504(ii) | Acidity regulator; Anticaking agent; Carrier; Colour retention agent | 09.2.2 Frozen battered fish, fish fillets, and fish products, including mollusks, crustaceans, and echinoderms | GMP | Excluding products conforming to the Standard for Quick Frozen Fish Sticks (Fish Fingers), Fish Portions and Fish Fillets – Breaded or in Batter (CODEX STAN 166-1989).; For use in... |
| Codex | 504(ii) | Acidity regulator; Anticaking agent; Carrier; Colour retention agent | 09.2.3 Frozen minced and creamed fish products, including mollusks, crustaceans, and echinoderms | GMP | For use in glaze, coatings or decorations for fruit, vegetables, meat or fish only. |
| Codex | 504(ii) | Acidity regulator; Anticaking agent; Carrier; Colour retention agent | 09.2.4 Cooked and/or fried fish and fish products, including mollusks, crustaceans, and echinoderms | GMP | - |
| Codex | 504(ii) | Acidity regulator; Anticaking agent; Carrier; Colour retention agent | 09.2.5 Smoked, dried, fermented, and/or salted fish and fish products, including mollusks, crustaceans, and echinoderms | GMP | Excluding products conforming to the Standard for Boiled Dried Salted Anchovies (CODEX STAN 236-2003).; Excluding products conforming to the Standard for Dried Shark Fins (CODEX... |
| Codex | 504(ii) | Acidity regulator; Anticaking agent; Carrier; Colour retention agent | 11.4 Other sugars and syrups (e.g. xylose, maple syrup, sugar toppings) | GMP | Excluding maple syrup. |
| Codex | 504(ii) | Acidity regulator; Anticaking agent; Carrier; Colour retention agent | 12.1.2 Salt Substitutes | GMP | - |
| Codex | 504(ii) | Acidity regulator; Anticaking agent; Carrier; Colour retention agent | 12.2.1 Herbs and spices | GMP | For herbs use is limited to herbs that have been ground or processed into powder only. |
| Codex | 504(ii) | Acidity regulator; Anticaking agent; Carrier; Colour retention agent | 14.1.5 Coffee, coffee substitutes, tea, herbal infusions, and other hot cereal and grain beverages, excluding cocoa | GMP | For use in ready-to-drink products and pre-mixes for ready-to-drink products only. |
| Codex | 528 | Acidity regulator; Colour retention agent | 01.1.3.2 Fluid buttermilk (plain) | GMP | For use in heat-treated buttermilk only. |
| Codex | 528 | Acidity regulator; Colour retention agent | 01.2.1.2 Fermented milks (plain), heat-treated after fermentation | GMP | Except for use in plain fermented milks and drinks based on fermented milks that are heat treated after fermentation conforming to the Standard for Fermented Milks (CXS 243-2003)... |
| Codex | 528 | Acidity regulator; Colour retention agent | 09.2.2 Frozen battered fish, fish fillets, and fish products, including mollusks, crustaceans, and echinoderms | GMP | Excluding products conforming to the Standard for Quick Frozen Fish Sticks (Fish Fingers), Fish Portions and Fish Fillets – Breaded or in Batter (CODEX STAN 166-1989).; For use in... |
| Codex | 528 | Acidity regulator; Colour retention agent | 09.2.3 Frozen minced and creamed fish products, including mollusks, crustaceans, and echinoderms | GMP | For use in glaze, coatings or decorations for fruit, vegetables, meat or fish only. |
| Codex | 528 | Acidity regulator; Colour retention agent | 09.2.4 Cooked and/or fried fish and fish products, including mollusks, crustaceans, and echinoderms | GMP | - |
| Codex | 528 | Acidity regulator; Colour retention agent | 09.2.5 Smoked, dried, fermented, and/or salted fish and fish products, including mollusks, crustaceans, and echinoderms | GMP | Excluding products conforming to the Standard for Salted Atlantic Herring and Salted Sprat (CODEX STAN 244-2004).; Excluding products conforming to the Standard for Dried Shark... |
| Codex | 528 | Acidity regulator; Colour retention agent | 11.4 Other sugars and syrups (e.g. xylose, maple syrup, sugar toppings) | GMP | Excluding maple syrup. |
| Codex | 528 | Acidity regulator; Colour retention agent | 12.1.2 Salt Substitutes | GMP | - |
| Codex | 528 | Acidity regulator; Colour retention agent | 14.1.5 Coffee, coffee substitutes, tea, herbal infusions, and other hot cereal and grain beverages, excluding cocoa | GMP | For use in ready-to-drink products and pre-mixes for ready-to-drink products only. |
SOURCE
Health Canada
Health Canada Status
Health Canada food-additive permissions by functional class and food scope.
| Jurisdiction | Class | Permitted foods | Maximum level | List |
|---|---|---|---|---|
| Canada | Acidity regulator | (a) Bacterial cultures | (a) Good Manufacturing Practice | List of Permitted Acidity Regulators and Acid-Reacting Materials |
| Canada | Acidity regulator | (b) Canned peas | (b) 500 ppm | List of Permitted Acidity Regulators and Acid-Reacting Materials |
| Canada | Acidity regulator | (c) Cocoa products as defined in Volume 4 of the Food Compositional Standards Document | (c) Good Manufacturing Practice. If used singly, the amount of magnesium hydroxide in neutralizing value, calculated from its weight, not to exceed the neutralizing value of 5% anhydrous potassium carbonate by weight of the cocoa product, calculated on a fat-free basis. If used in any combination with other acidity regulators, the total combined amount of these acidity regulators in neutralizing value, calculated from their respective weight, not to exceed the neutralizing value of 5% anhydrous potassium carbonate by weight of the cocoa product, calculated on a fat-free basis. This total combined amount does not include any of citric acid, phosphoric acid or tartaric acid that may be added up to their respective maximum levels of use set out in this list. | List of Permitted Acidity Regulators and Acid-Reacting Materials |
| Canada | Acidity regulator | (d) Gelatin | (d) Good Manufacturing Practice | List of Permitted Acidity Regulators and Acid-Reacting Materials |
| Canada | Acidity regulator | (e) Ice cream mix; Ice milk mix | (e) Good Manufacturing Practice | List of Permitted Acidity Regulators and Acid-Reacting Materials |
SOURCE
EU Commission
EU Food Contact Materials
EU FCM Substances
EU food-contact material rows and migration-limit fields.
| Jurisdiction | FCM no. | Ref no. | Substance | Use | SML | Regulation |
|---|---|---|---|---|---|---|
| European Union | 396 | 64640 | magnesium hydroxide | additive/PPA | - | Regulation (EU) No 10/2011, Annex I |
SOURCE
JECFA
JECFA ADI
JECFA ADI Values
JECFA ADI records and evaluation years.
| Jurisdiction | Chemical name | JECFA no. | CAS | ADI | ADI upper | Function | Evaluation year |
|---|---|---|---|---|---|---|---|
| JECFA | MAGNESIUM HYDROXIDE | - | 1309-42-8 | NOT LIMITED | - | ACIDITY_REGULATOR, COLOUR_RETENTION_AGENT | 1965 |
| JECFA | MAGNESIUM HYDROXIDE CARBONATE | - | 39409-82-0 | NOT SPECIFIED | - | ACIDITY_REGULATOR, ANTICAKING_AGENT, CARRIER, CARRIER_SOLVENT, COLOUR_RETENTION_AGENT | 1979 |
SOURCE
ingredients
ghs classifications
Cross-Reference to Cosmetics / Chemicals / Pharma
Same-CAS public rows from adjacent Roots verticals where available.
SOURCE
Cross-vertical comparison
ingredients | ghs classifications
Cross-Vertical Regulatory Divergence
This substance has different regulatory treatment across food, cosmetics, and industrial use.
SOURCE
FAQPage JSON-LD
public food renderer rows
Frequently Asked Questions
Food-use, safety, ADI, and cross-vertical answers mirrored into FAQPage JSON-LD.
What is Magnesium hydroxide used for in food?
Magnesium hydroxide appears in food-use rows as: Acidity regulator; Acidity regulator; Anticaking agent; Carrier; Colour retention agent; Acidity regulator.
Is Magnesium hydroxide / E528 safe?
This page does not assign a standalone safety verdict; it renders public regulatory evidence. ADI/reference value: ADI NOT LIMITED mg/kg bw. EU status evidence: PUBLISHED. US/FDA evidence: GRAS.
What is the ADI for Magnesium hydroxide?
Magnesium hydroxide has this ADI/reference value in the food-safety tables: ADI NOT LIMITED mg/kg bw. Source: WHO JECFA.
Is Magnesium hydroxide also used in cosmetics?
Magnesium hydroxide has a same-CAS cosmetics cross-reference: Magnesium Hydroxide, EU status restricted.