Name | Vapour Density |
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Code | dv |
Symbol | d<sub>v</sub> |
Description | Vapour density is the density of a vapour in relation to that of air. It may be defined as mass of a certain volume of a substance divided by mass of same volume of air. Vapour density indicates whether a gas is denser (greater than one) or less dense (less than one) than air. The density has implications for container storage and personnel safety - if a container can release a dense gas, its vapour could sink and, if flammable, collect until it is at a concentration sufficient for ignition. Even if not flammable, it could collect in the lower floor or level of a confined space and displace air, possibly presenting an asphyxiation hazard to individuals entering the lower part of that space. |
Type | Physicochemical (Substance) |
Data Type | Numeric |
Please enter a message. | Please enter a vapour density. |
Invalid Message | Invalid vapour density. |
Validation Rule |
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Access | Public |
No | Name | Value | Validity Conditions | |||
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1. | Vapour density from molecular weight | ƒ(MW) | - | - | - | - |
Risk Assessment | Natural Hazards | Industrial Plants | Scientific | Users |