PhysProps is a chemical physical property database and property estimating application. The PhysProps database is composed of over 6,500 chemical specie names and their synonyms. It includes both organic and inorganic compounds. There are 28 physical properties for each compound in the database, such as critical T/P/V, boiling points, vapor pressures, viscosities, and more. If the particular compound property is not in the database, it maybe possible to estimate it from the estimation module. There are 18 properties which can be estimated from standard techniques. PhysProps includes the following features: search as you type compound browsing to find the exact compound quickly\; property units of measure that can be set to a global standard, individually, or changed instantly depending on user preferences\; multiple properties that can be displayed in either table or graphical viewing formats\; and a graphically based periodic table.