Bentonite Clay
General handling and safety reference information.
Identification
Hazard Overview
Bentonite itself is a low-toxicity natural mineral, but the main hazard is dust: fine clay dust can irritate eyes, skin, and especially the respiratory tract. Depending on the source deposit, bentonite can contain trace crystalline silica — repeated, prolonged inhalation of fine mineral dust (silica-bearing or not) is a recognized long-term respiratory hazard, so dust control matters even though the material is not acutely toxic.
First Aid Measures
- Eye contact: Flush with clean water for at least 15 minutes. Seek medical attention if irritation persists.
- Skin contact: Wash with water. Generally low irritation, but wash off to avoid drying/chafing effects.
- Inhalation: Move to fresh air away from dust. Seek medical attention if coughing or irritation persists.
- Ingestion: Rinse mouth with water. Not expected to be acutely toxic in small amounts, but seek medical advice if concerned.
Handling & Storage
Store in a dry, sealed container — bentonite swells substantially on contact with water. Handle in a well-ventilated area or use dust suppression when scooping or pouring dry powder to minimize airborne dust.
Personal Protective Equipment
- Dust mask or respirator rated for particulates when handling dry powder
- Safety glasses or goggles
- Gloves for extended handling
Spill & Disposal
Sweep up dry material carefully to limit dust, and place in a suitable container. Wetted bentonite is dense and slippery when disturbed — allow it to fully dry where practical before removal, or wet it down first to prevent dust and clean up as sludge. Dispose of per local regulations.