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  • industrial
  • pharma

Magnesium carbonate hydroxide

CAS 39409-82-0 · 40/100 · High conf.

Also registered as 4 other CAS numbers

1319-50-2 · 8014-98-0 · 39456-66-1 · 1416909-20-0

Magnesium carbonate hydroxide chemical structure

Concern score

40/100Moderate concern based on regulatory listings.
High confidence

Magnesium carbonate hydroxide in plain language

What it is

Also known as Hydrated basic magnesium carbonate · Magnesium hydroxide carbonate · Magnesium subcarbonate (light or heavy) · E-504(II) · Ins NO.504(II) · INS-504(II)

Show all 9 names

magnesium carbonate · magnesium carbonate light · basic magnesium carbonate

What it does

Used in food as an acidity regulator, anticaking agent, carrier, carrier solvent, colour retention agent.

  • Acidity regulator, anticaking agent, carrier, carrier solvent, colour retention agent
  • Humectant
  • pH adjuster
  • Flavouring
  • Lubricant
  • Anti-caking agent
Is it a concern?
Moderate concern: no hazard classifications on record.

Why it's flagged

EPA CPDat observed this chemical in 5 composition records across product categories including Landscape/yard, Laboratory supplies.

The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.

Regulation

No restrictions found. Magnesium carbonate hydroxide appears in these published regulatory listings.

  • In marketed US drugs

Recorded in these product areas

  • Found in consumer products
  • Industrial
  • GLOBALJECFAEvaluatedJECFA evaluation record.
  • GLOBALJECFANOT SPECIFIEDJECFA evaluation lists ADI NOT SPECIFIED. Functional class: acidity regulator, anticaking agent, carrier, carrier solvent, colour retention agent.
    • JECFA evaluation lists ADI NOT SPECIFIED. Functional class: acidity regulator, anticaking agent, carrier, carrier solvent, colour retention agent.Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 5 composition records across product categories including Landscape/yard, Laboratory supplies. EPA CPDat classifies this chemical for functional uses including Processing aids not otherwise specified, Humectant, Flavouring and nutrient.
    • EPA CPDat observed this chemical in 5 composition records across product categories including Landscape/yard, Laboratory supplies. EPA CPDat classifies this chemical for functional uses including Processing aids not otherwise specified, Humectant, Flavouring and nutrient.Source →
  • USFDAmarketed drug occurrenceFDA NDC lists this ingredient in 6 active drug products and 6 total products.
    • FDA NDC lists this ingredient in 6 active drug products and 6 total products.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

Independent scientific assessments cited by the records we hold, with the year and link where the record gives one.

  • JECFA

    Joint FAO/WHO Expert Committee on Food Additives

    • JECFA evaluation record.

      Year not recorded · GLOBAL JECFA listing · Read the source →

    • JECFA evaluation lists ADI NOT SPECIFIED. Functional class: acidity regulator, anticaking agent, carrier, carrier solvent, colour retention agent.

      Year not recorded · GLOBAL JECFA listing · Read the source →

  • EFSA

    European Food Safety Authority

    No EFSA opinion on file.

Evidence & sources

No graded research studies for Magnesium carbonate hydroxide yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

6 data sources

Where this comes from

  • EPA Chemical and Products Database

    exposure · updated February 8, 2019

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA National Drug Code Directory

    regulatory · updated 2026-12-31

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • WHO JECFA Database

    regulatory · updated 2026-10-04

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Food use

Food-use source coverage is present in the current record.

Good fit

The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.

Fragrance avoidance

No fragrance-linked caution surfaced in the current profile.

Good fit

This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.

Where it has been recorded

How often FDA National Drug Code directory has listed Magnesium carbonate hydroxide in a product composition. These are source records, not Greenveil catalog products.

Source records

6

Typical roles

Acidity regulator, anticaking agent, carrier, carrier solvent, colour retention agentHumectantpH adjusterFlavouringLubricantAnti-caking agent
See products using Magnesium carbonate hydroxide →

Catalog

Found in these products

Their ingredient lists include Magnesium carbonate hydroxide; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 101 →Find products without it →