Heat-On replaces unsafe oil baths at a leading Australian University Situation Oil baths were being used to heat reaction mixtures but with the high cost of silicone oils, laboratory sta? were using less safe para?n oils. Also, a relatively inexpensive alternative seemed to polymerize with monotonous regularity. Objective Replace expensive oils, improve safety in the teaching and research labs and reduce environmentally harmful oil waste.Results After investigating blocks from di?erent suppliers Heat-On was chosen for several reasons. The main reason was that unlike ‘nested’ systems the 250ml, 500ml, 1 litre, 2 litre and 3 litre came as stand-alone blocks, so more than one person could perform a reaction at a time. Another block system had several 'nested' sizes, needing the 1 litre block

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