MATERIAL SAFETY DATA SHEET USER'S GUIDE - CSST

Fire or explosion hazardFlash point and method of determinationThe flash point is the lowest temperature at which asubstance gives off sufficient vapours to form a flammablemixture with the air on contact with a flameor spark. A product’s flash point is determined byeither of the two following methods: in a closed cup,meaning inside the container that contains it, or inan open cup, meaning near the surface of the liquid.The lower a liquid’s flash point, the greater the riskof fire.ExampleNormal butanol has a flash point in a closed cup of29°C (Set-a-flash method). It is therefore extremelyflammable on a hot summer day when its vapourscome in contact with a flame or spark.24