“UN 2031, Nitric acid, other than red fuming, with more than 20% and less than 65% nitric acid” intended for use in sterilization devices only, may be transported on passenger aircraft irrespective of the indication of “forbidden” in columns (9A) of the §172.101 table provided that:
a. Each inner packaging contains not more than 30 mL;
b. Each inner packaging is contained in a sealed leak-proof intermediate packaging with sufficient absorbent material capable of containing the contents of the inner packaging;
c. Intermediate packagings are securely packed in an outer packaging of a type permitted by §173.158 which meet the requirements of part 178 of this subchapter at the Packing Group I performance level;
d. The maximum quantity of nitric acid in the package does not exceed 300 mL; and
e. Transport in accordance with this special provision must be noted on the shipping paper.