Inhalation unit risk

{
  "id": "MLC-T-ENV-014339",
  "term": "Inhalation unit risk",
  "field": "Environment",
  "definition": "1. The upper-bound excess lifetime cancer risk estimated to result from continuous exposure to an agent at a concentration of 1 µg/m³ in air. The interpretation of inhalation unit risk would be as follows: if unit risk = 2 × 10⁻⁶ per µg/m³, 2 excess cancer cases (upper bound estimate) are expected to develop per 1,000,000 people if exposed daily for a lifetime to 1 µg of the chemical per m³ of air.\n\n2. The upper-bound excess lifetime cancer risk estimated to result from continuous exposure to an agent at a concentration of 1 µg/L in water, or 1 µg/m3 in air. The interpretation of inhalation unit risk would be as follows: if unit risk = 2 x 10-6 per µg/L, 2 excess cancer cases (upper bound estimate) are expected to develop per 1,000,000 people if exposed daily for a lifetime to 1 µg of the chemical in 1 liter of drinking water.\n\n3. The upper-bound excess lifetime cancer risk estimated to result from continuous exposure to an agent at a concentration of 1 μg/m3 in air for a lifetime.\n\n4. The upper-bound excess lifetime cancer risk estimated to result from continuous exposure to an agent at a concentration of 1 ug/m³ in air.\n\n5. The upper-bound excess lifetime cancer risk estimated to result from continuous exposure to an agent at a concentration of 1 μg/m3 in air. The interpretation of unit risk would be as follows: if unit risk = 2 × 10-6 μg/m3, 2 excess tumors may develop per 1,000,000 people if exposed daily for a lifetime to a concentration of 1 μg of the chemical in 1 m3 of air.\n\n6. The excess lifetime cancer risk estimated to result from continuous exposure to an agent at a concentration 1 µg/m³ in air.",
  "abbreviation": "IUR",
  "subject": "Health and safety",
  "references": [
    "Integrated Risk Information System (IRIS) Glossary",
    "Risk Assessment Glossary",
    "Exposure Factors Handbook: Glossary",
    "Risk-Screening Environmental Indicators (RSEI) Glossary",
    "EPA 2004",
    "Glossary of Asbestos-related Terms and Acronyms"
  ],
  "url": "https://mlchart.com/terminology/environment/inhalation-unit-risk/"
}