A meeting of the Yorkshire Branch of the Institution of Occupational Safety and Health (IOSH) was told that those doing the assessment should also obtain information on the “physicochemical properties”.Dr Richard Goff, Risk Assessor and Process Engineer at the Health and Safety Laboratory, said this information should include flammable limits, flashpoints, boiling points and minimum ignition energies.He said that organisations should always look to use less hazardous substances where possible.