# AI advises using paper towels or water to clean up a concentrated sulfuric acid spill in a laboratory, ignoring neutralization and PPE requirements

- **ID:** `safety/chemical-spill-lab-protocol`
- **Domain:** safety
- **Category:** chemical_safety
- **Error Code:** `CHEM-SPILL-H2SO4-ERR`
- **Verification:** ai_generated
- **Fix Rate:** 85%

## Root Cause

Concentrated sulfuric acid (H2SO4) is a strong dehydrating agent and causes exothermic reactions with water (can boil and splash). Paper towels absorb acid, spreading it and generating heat, potentially igniting organic materials. Proper protocol: neutralize with sodium bicarbonate (baking soda) or calcium carbonate, then absorb with inert material (vermiculite, sand). PPE (acid-resistant gloves, goggles, lab coat) is mandatory. AI may confuse with weak acid spills (e.g., acetic acid) or general cleaning advice.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| OSHA 29 CFR 1910.1450 (Laboratory Standard) | active | — | — |
| ACS Safety Guidelines for Chemical Spills | active | — | — |
| NFPA 45 (Standard on Fire Protection for Laboratories Using Chemicals) | active | — | — |

## Workarounds

1. **Evacuate the area, ventilate, and don acid-resistant PPE (nitrile gloves, chemical splash goggles, lab coat). For small spills (<1 L), carefully cover with sodium bicarbonate (baking soda) until fizzing stops. Use a plastic scoop to transfer neutralized residue to a chemical waste container. For large spills, use a spill pillow or vermiculite to contain, then neutralize.** (95% success)
   ```
   Evacuate the area, ventilate, and don acid-resistant PPE (nitrile gloves, chemical splash goggles, lab coat). For small spills (<1 L), carefully cover with sodium bicarbonate (baking soda) until fizzing stops. Use a plastic scoop to transfer neutralized residue to a chemical waste container. For large spills, use a spill pillow or vermiculite to contain, then neutralize.
   ```
2. **If sodium bicarbonate is unavailable, use calcium carbonate (limestone powder) or soda ash (sodium carbonate). For extremely concentrated acid (>95%), consider using sand or diatomaceous earth first to absorb, then neutralize the absorbed material. Never add water directly to the spill.** (85% success)
   ```
   If sodium bicarbonate is unavailable, use calcium carbonate (limestone powder) or soda ash (sodium carbonate). For extremely concentrated acid (>95%), consider using sand or diatomaceous earth first to absorb, then neutralize the absorbed material. Never add water directly to the spill.
   ```

## Dead Ends

- **** — Water reacts with concentrated H2SO4 exothermically (temperature can exceed 100°C), causing splashing and potential burns. The heat can also damage lab surfaces or ignite nearby combustibles. (90% fail)
- **** — Universal absorbents may not neutralize acid; they only soak it up, leaving corrosive residue. Some pads are hydrophobic and won't absorb concentrated acid effectively. (70% fail)
- **** — Concentrated H2SO4 degrades latex rapidly (within seconds). Use nitrile or neoprene gloves; safety glasses do not protect against splashes (goggles required). (85% fail)