They will be a good choice for chemists working with very expensive materials or materials only available in small amounts. They will also appeal to users who wish to minimize the risks associated
with hazardous materials or reactions by restricting the reactants or products to a minimum. Use of the Series 4590 Reactors also helps minimize the quantities of waste products which may require
special disposal procedures. The 4590 systems are now available in high pressure (5000 psi) or high pressure/high temperature (500 °C) versions.