Magnesium Carbonate
- Abrasives
- CAS 546-93-0
- IUPAC: Magnesium carbonate
Magnesium Carbonate (CAS 546-93-0) appears in 1 of the 1,812 car-care products CarCareTruth tracks (as of June 2026).
Not classified as a GHS health hazard at relevant concentrations in liquid coatings formulations. Not Prop 65–listed. As a suspended filler in a liquid matrix, inhalation exposure to respirable dust is not a relevant pathway during normal application.
Magnesium carbonate is a naturally occurring inorganic mineral used as an inert filler and viscosity modifier in automotive putties, paints, and coatings. It contributes body to the formulation and helps control sag resistance. The compound has low environmental hazard — it is not aquatically toxic and is chemically inert under normal use conditions. No significant health concerns have been identified at the concentrations found in consumer coatings.
Health & environment profile
- VOC
- no
- Prop 65 listed
- no
- Asthmagen
- no
- EPA Safer Choice
- no
- Aquatic toxicity
- no
- Biodegradable
- no
- Bioaccumulative
- no
- Persistent
- yes
- Ozone depleting
- no
- Microplastic
- no
- PFAS
- no
- Env. score
- 4/5
Common questions about Magnesium Carbonate
- What is Magnesium Carbonate used for in car care?
- Inorganic mineral filler in paints, putties, and coatings; contributes body and viscosity control
- Is Magnesium Carbonate a VOC?
- No. Magnesium Carbonate is not classified as a volatile organic compound (VOC).
- Is Magnesium Carbonate on California's Proposition 65 list?
- No. Magnesium Carbonate is not on California's Proposition 65 list.
1 product contain this
Bondo Scratch & Rock Chip Repair KitProp 65paint-touch-up
Related
Health and environment notes translate the manufacturer Safety Data Sheet, the GHS classification, and authoritative regulatory listings (California Prop 65, EPA). Not medical advice. They describe the ingredient itself; whether a hazard applies to a finished product depends on its concentration and how it's used.