{
  "id": "safety/chemical-spill-neutralization",
  "signature": "AI advises using paper towels or water to clean up a concentrated sulfuric acid spill in a laboratory, ignoring neutralization and proper PPE",
  "signature_zh": "AI建议使用纸巾或水清理实验室中的浓硫酸泄漏，忽略了中和和适当的个人防护装备",
  "regex": "(?i)(sulfuric acid.*paper towel|acid spill.*water.*clean|sulfuric.*wipe up|neutralize.*sulfuric.*water)",
  "domain": "safety",
  "category": "physical_safety",
  "subcategory": null,
  "root_cause": "Concentrated sulfuric acid (H2SO4) reacts exothermically with water, generating heat that can cause splattering or container rupture; paper towels absorb acid but can spread it or cause burns through gloves; proper protocol is neutralization with sodium bicarbonate or calcium carbonate, then absorption with inert material.",
  "root_cause_type": "generic",
  "root_cause_zh": "浓硫酸（H2SO4）与水发生放热反应，产生热量可能导致飞溅或容器破裂；纸巾吸收酸但可能扩散酸液或通过手套造成灼伤；正确规程是用碳酸氢钠或碳酸钙中和，然后用惰性材料吸收。",
  "versions": [
    {
      "version": "OSHA Laboratory Standard 29 CFR 1910.1450 2023",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "ACS Chemical Safety Manual 2024",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Adding water to concentrated sulfuric acid causes violent boiling and splashing; the heat of dilution can raise temperature to >100°C, potentially melting plastic containers or causing burns through gloves.",
      "fail_rate": 0.55,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Using paper towels or rags to wipe up the acid can spread it over a larger area and increase exposure; the acid can also react with cellulose, generating heat and possibly igniting the paper.",
      "fail_rate": 0.35,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Using sodium hydroxide (NaOH) for neutralization is dangerous because it is also caustic and the reaction is highly exothermic; sodium bicarbonate is safer as it produces CO2 which helps dissipate heat.",
      "fail_rate": 0.1,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "For a small sulfuric acid spill (<500 mL): 1) Don acid-resistant gloves (neoprene or nitrile), safety goggles, and a lab coat. 2) Cover the spill with sodium bicarbonate (baking soda) or calcium carbonate (limestone) until fizzing stops (neutralization). 3) Use a plastic scoop and dustpan to collect the neutralized residue. 4) Dispose as hazardous waste. Do not use water or paper towels. Example command for lab safety: 'spill_response --chemical H2SO4 --volume 200ml --neutralizer NaHCO3'",
      "success_rate": 0.9,
      "how": "For a small sulfuric acid spill (<500 mL): 1) Don acid-resistant gloves (neoprene or nitrile), safety goggles, and a lab coat. 2) Cover the spill with sodium bicarbonate (baking soda) or calcium carbonate (limestone) until fizzing stops (neutralization). 3) Use a plastic scoop and dustpan to collect the neutralized residue. 4) Dispose as hazardous waste. Do not use water or paper towels. Example command for lab safety: 'spill_response --chemical H2SO4 --volume 200ml --neutralizer NaHCO3'",
      "condition": "",
      "sources": []
    },
    {
      "action": "For large spills (>500 mL): Evacuate the area, close the door, and call the lab safety officer or emergency services. Use a spill kit containing inert absorbent (e.g., vermiculite or sand) to contain the acid, then neutralize with sodium carbonate. Follow OSHA guidelines: https://www.osha.gov/laboratory",
      "success_rate": 0.85,
      "how": "For large spills (>500 mL): Evacuate the area, close the door, and call the lab safety officer or emergency services. Use a spill kit containing inert absorbent (e.g., vermiculite or sand) to contain the acid, then neutralize with sodium carbonate. Follow OSHA guidelines: https://www.osha.gov/laboratory",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "For a small sulfuric acid spill (<500 mL): 1) Don acid-resistant gloves (neoprene or nitrile), safety goggles, and a lab coat. 2) Cover the spill with sodium bicarbonate (baking soda) or calcium carbonate (limestone) until fizzing stops (neutralization). 3) Use a plastic scoop and dustpan to collect the neutralized residue. 4) Dispose as hazardous waste. Do not use water or paper towels. Example command for lab safety: 'spill_response --chemical H2SO4 --volume 200ml --neutralizer NaHCO3'",
    "For large spills (>500 mL): Evacuate the area, close the door, and call the lab safety officer or emergency services. Use a spill kit containing inert absorbent (e.g., vermiculite or sand) to contain the acid, then neutralize with sodium carbonate. Follow OSHA guidelines: https://www.osha.gov/laboratory"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://www.acs.org/content/acs/en/chemical-safety.html",
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.85,
  "fix_success_rate": 0.88,
  "resolvable": "true",
  "first_seen": "2023-09-12",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}