Also known as: Joint compound, Mud, Drywall mud, Taping compound
Quick Facts
CAS Number
Mixture
Signal Word
WARNING
GHS Hazard Classes
harmful
NFPA Rating
Health: 1 / Flammability: 0 / Reactivity: 0
Common Names
Joint compound, Mud, Drywall mud, Taping compound
Hazard Summary
⚠ WARNING: Low hazard when wet; primary risk is crystalline silica dust during sanding. OSHA PEL for respirable silica is 50 µg/m³. Always wet-sand or use HEPA-equipped tools.
GHS Hazard Pictograms
⚠ Harmful/Irritant
Hazard Statements (H-codes)
H315 – Causes skin irritation
H319 – Causes serious eye irritation
H335 – May cause respiratory irritation
H350i – Sanding dust may cause cancer via inhalation (crystalline silica)
Precautionary Statements (P-codes)
P260 – Do not breathe dust when sanding
P305+P351+P338 – IF IN EYES: Rinse with water for 15 min
P501 – Dispose of contents/container per local regulations
First Aid Measures (Section 4)
👁Eye Contact▼
Flush with water for 15 minutes. Seek medical attention if irritation persists.
🖐Skin Contact▼
Wash with soap and water.
🫁Inhalation▼
Move to fresh air. Sanding dust causes respiratory irritation and long-term silica exposure risk.
🫦Ingestion▼
Rinse mouth. Seek medical attention if large quantity ingested.
Storage & Handling
🔒 Storage & Handling: Keep from freezing — once frozen, compound is unusable. Store at 40–95 °F. Keep sealed to prevent drying.
PPE Requirements
Dust mask (N95) for sanding
Safety glasses during sanding
Nitrile gloves
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