Boiling Stones 30g

Use these PTFE chips to promote gentle, efficient boiling and help prevent overheating of highly volatile liquids. Saint Gobain Performance Plastics™ Chemware™ PTFE Boiling Stones are not affected by acids, hydrocarbons, ketones, esters, alcohols or alkalis.

Ideal for continuous extraction methods
Chemically inert, and not affected by boiling acids, hydrocarbons, ketones, esters, alcohols or alkalis
Noncontaminating, show no trace of acidity or alkalinity
Will not scratch or abrade glassware
Leave no powdery residue

(At temperatures above 260°C (500°F), a few chemicals at high concentration have been reported reactive to PTFE. These include 80% NaOH or KOH, metal hydrides (such as boranes), aluminum chloride, ammonia and certain amines and imines. Also, slow oxidative attack by 70% nitric acid under pressure at 250°C (480°F) has been observed. Special testing is required when extremes of reducing or oxidizing conditions are approached.)