Definition & Operational Usage
Vapor density is a measure of how heavy a vapor is compared to air, with air assigned a value of 1. Vapors with a density greater than 1 are heavier than air and tend to settle in low-lying areas, while those with a density less than 1 will rise and disperse upwards.
Category context: Hazardous materials, decon, isolation zones, UN/ERG concepts, and CBRN terminology.
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