Nepheline Syenite
- Abrasives
- CAS 37244-96-5
- IUPAC: Nepheline syenite
Nepheline Syenite (CAS 37244-96-5) appears in 2 of the 1,812 car-care products CarCareTruth tracks (as of June 2026).
Naturally occurring feldspar mineral used as a mild abrasive. Not classified as a health hazard under GHS. Inhalation of respirable dust is a nuisance irritant at elevated concentrations, but wet-sanding and liquid-suspension use eliminates airborne dust concern. No systemic toxicity.
Nepheline syenite is a naturally occurring feldspar mineral used as a mild polishing abrasive in light-duty compounds. It is finer and less aggressive than aluminum oxide or silica, making it well-suited for the final buffing stage in headlight restoration compounds where the goal is clarifying the polycarbonate surface rather than cutting it.
In car care applications, it appears in water-based headlight compounds as the primary abrasive at 10–18% concentration. It is not classified under GHS and carries no health hazard codes.
Environmentally, nepheline syenite is a mined mineral — persistent in the environment as a particulate but non-toxic and non-bioaccumulative. Not a Prop 65 substance.
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 Nepheline Syenite
- What is Nepheline Syenite used for in car care?
- Fine mineral abrasive / polishing agent in light-duty compounds
- Is Nepheline Syenite a VOC?
- No. Nepheline Syenite is not classified as a volatile organic compound (VOC).
- Is Nepheline Syenite on California's Proposition 65 list?
- No. Nepheline Syenite is not on California's Proposition 65 list.
2 products contain this
Turtle Wax 2-in-1 Headlight Cleaner and Sealantheadlight-restoration
Turtle Wax Speed Headlight Lens Restorer Kit (53435)headlight-restoration-kit
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.