Ultra-pure, virgin PTFE boiling stones promote gentle, efficient boiling and help prevent overheating, even of highly volatile liquids. Ideal for continous extraction methods. Stones minimise 'bumping' during reflux and distillation.

• Chemical resistant
• Ideal for boiling organic liquids
• Minimises superheating

The boiling stones are not affected by acids, hydrocarbons, ketones, esters, alcohols or alkalis. They are easily cleaned and non-contaminating. Shows no trace of face acidity or alkalinity. They will not scratch or abrade glassware and leave no residue. Usable up to 288 °C.