Assertion: hydrogen fluoride | /r/HasProperty | heated at 20°
Facets:
value: for rectification
type: PURPOSE
Source sentences:
text: While continuously charging hydrogen fluoride into the device at a rate of 80 kg/hour, fluorine gas (88.6% F 2 and 11.4% HF) was continuously introduced into hydrogen fluoride from the container via a gas inlet to an F 2 concentration of 100 ppm, and hydrogen fluoride was heated at about 20° C. for rectification.