A pH level of 7 indicates neutrality. The quantity of a product that will dissolve in water at room temperature. The term has important health consequences. The ratio of the weight of a product's known volume to the weight of an equal amount of water. A specific gravity of greater than 1 means it will float on water.
Most flammable liquids are lighter than water.
The recommended exposure concentration above the TWA for a limited number of 15- minute exposure periods. Toxicity - The toxicity of a chemical can be measured using a of animal studies. Vapor Density - The weight of a vapor or gas compared to an equal volume of air. Air is rated as 1. Liquids with higher vapor pressures require better ventilation.