Only substances with a viscosity of more than 2,680 mm/s are authorized.

Special packing provision PP81:
For UN No. 1790 with more than 60 % but not more than 85 % hydrogen fluoride and UN No. 2031 with more than 55 % nitric acid, the permitted use of plastics drums and jerricans as single packagings shall be two years from their date of manufacture.