Assertion: hydrogen fluoride | /r/HasProperty | 99.9% hf
Facets:
Source sentences:
text: Hydrogen fluoride (99.9% HF and 9 ppm As) was continuously charged into the device at a rate of 80 kg/hour while fluorine gas
text: The same device as used in Example 3 was used, to which hydrogen fluoride (99.9% HF and 9 ppm of As) was supplied at a rate of 80 kg/hour.