Is Magnesium Carbonate Hydroxide safe in cosmetics?
Magnesium Carbonate Hydroxide has a safety rating of "MODERATE" in our database. EU status: permitted. US status: permitted.
Moderate
Cosmetic Ingredient
Magnesium Carbonate Hydroxide
Also known as: Basic magnesium carbonate, Kinsei, Marimo BC 6, MgTube, Magnesium hydroxide carbonate (+5 more)
INCI: MAGNESIUM CARBONATE HYDROXIDE
Magnesium Carbonate Hydroxide (CAS 12125-28-9) is a cosmetic cosmetic ingredient functioning as Buffering agent, Viscosity controlling, Bulking agent, Opacifying. EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.
View industrial chemical safety profile for CAS 12125-28-9 →
Auto-generated CPSR Part A draft with source citations
Function
Buffering agent, Viscosity controlling, Bulking agent, Opacifying
Safety Rating
MODERATE
Chemistry & Identifiers
IUPAC Name
hexamagnesium;tetracarbonate;dihydroxide;pentahydrate
InChIKey
UOVKYUCEFPSRIJ-UHFFFAOYSA-D
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
Allowed. Also has GRAS status for food use by FDA; not restricted in cosmetics
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Magnesium Carbonate Hydroxide.
Calculate MoS for your specific formulation with the MoS Calculator.
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
100 - 1,000 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
PubChem Annotations
Safety and regulatory annotations from PubChem (NCBI) aggregated sources.
Regulatory (2)
JECFA Evaluation
HYDRATED BASIC MAGNESIUM CARBONATE | 1979 | NOT SPECIFIED | Included in the ADI for other hydrogen carbonates | TRS 648-JECFA 23/31 | FAS 67.29/NMRS 40A,B,C-JECFA 9/153 (1965)
Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)
EU Food Improvement
Food additives
Source: EU Food Improvement Agents
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Binder
Filler
Viscosity modifier
pH regulating agent
Expert Verdict
Expert safety assessment and concern-level summary for Magnesium Carbonate Hydroxide.
NOAEL Studies Summary
View details ->Public NOAEL study rows linked to Magnesium Carbonate Hydroxide by CAS number or substance name.
Studies
3
Lowest NOAEL
414 mg/kg bw/day
Highest NOAEL
414 mg/kg bw/day
ECHA_REACH_reach_study_results_dossiers_23-05-2023.zip
Known Synonyms
Basic magnesium carbonate
Kinsei
Marimo BC 6
MgTube
Magnesium hydroxide carbonate
hydroxycarbonate de magnesium
Magnesiumcarbonathydroxid
hidroxido carbonato de magnesio
Hidroxido de carbonato de magnesio
EINECS 235-192-7
Chemical Function
Viscosity modifier
pH regulating agent
Filler
Binder
Regulatory Lists
inert_ingredient; non_food_use; Pesticides
Australian Status
AICIS status: listed
Frequently Asked Questions
Is Magnesium Carbonate Hydroxide allowed in the EU?
Magnesium Carbonate Hydroxide EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Magnesium Carbonate Hydroxide do in cosmetics?
Magnesium Carbonate Hydroxide functions as: Buffering agent, Viscosity controlling, Bulking agent, Opacifying. It is classified as a cosmetic ingredient in our database. CAS number: 12125-28-9.
Is Magnesium Carbonate Hydroxide used outside cosmetics?
Magnesium Carbonate Hydroxide also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Compliance Tools
Check Magnesium Carbonate Hydroxide compliance across multiple jurisdictions:
Ingredient Decoder
Paste a full ingredient list for instant analysis
82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
Check compliance across multiple jurisdictions
MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
Compare limits across jurisdictions
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