| validation |
| A documented programme that provides a high degree of assurance that a specific procedure, process equipment, material or activity will consistently lead to the expected results. |
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| VAM |
1. See vinyl acetate monomer (VAM).
2. Valid Analytical Measurement Programme. |
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| vapour density |
| The relative weight of a vapour compared to an equal volume of air (indicates whether vapours will rise or sink). |
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| vapour pressure |
| Pressure of saturated vapour above liquids or solids (usually provided at 20°C). The higher the vapour pressure, the higher the concentration will be in unventilated spaces. |
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| VATG |
| Vinyl Acetate Toxicology Group (USA). |
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| VCI |
| Verband der (deutschen) Chemischen Industrie e.V. (German chemical industry federation). |
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| VCM |
| See vinyl chloride monomer (VCM). |
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| VDU |
| Visual Display Unit. |
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| VERIK |
| Emergency and Information Centre of the Hungarian Chemical Industry. |
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| VFA |
| Verband Forschender Arzneinmittelhersteller. |
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| VIC |
| Volatile Inorganic Compounds. |
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| VIF |
| Virtually Impermeable Film. |
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| vinyl acetate monomer (VAM) |
| A colourless, liquid organic compound, employed in the production of plastics. |
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| vinyl chloride monomer (VCM) |
A colourless, flammable gas, used principally in making polyvinyl chloride, an important synthetic resin.
ALSO: chloroethylene. |
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| viscous |
| Having resistance to flow. |
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| vitellogenin |
| Vitellogenin is the major protein constituent of fish eggs, used as a nutrient supply by the developing fry. Female fish produce vitellogenin in their livers under stimulation by oestrogens, and it is then transported to the eggs via the blood. The natural level of vitellogenin in male fish blood is very low in comparison to normal and spawning females. However, exposure of male fish to some chemicals results in a drastic increase in the level of circulating vitellogenin. This is thought to be as a result of oestrogenic activity of these chemicals. |
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| VNCI |
| Vereniging van de Nederlandse Chemische Industrie (Dutch chemical industry federation). |
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| VOC |
| See Volatile Organic Compound (VOC). |
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| Volatile Organic Compound (VOC) |
| The term “Volatile Organic Compounds” refers to organic compounds that readily evaporate. VOCs include pure hydrocarbons, partially oxidised hydrocarbons, and organic compounds containing chlorine, sulfur or nitrogen. They are widely used as fuels (e.g., propane and gasoline), as paint thinners and solvents, and in the production of plastics. VOC emissions have to be carefully controlled so as not to contribute to air toxicity and urban smog. |
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| volatility |
| The tendency or ability of a liquid to pass into the vapour phase; liquids such as alcohol or gasoline, because of their tendency to evaporate rapidly, are called volatile liquids. |
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