1.C.6.Fluids and lubricating materials, as follows:

a. Not used since 2015
b. Lubricating materials containing, as their principal ingredients, phenylene or alkylphenylene ethers or thio-ethers, or their mixtures, containing more than two ether or thio-ether functions or mixtures thereof;
c. Damping or flotation fluids having all of the following:
1. Purity exceeding 99.8%;
2. Containing less than 25 particles of 200 µm or larger in size per 100 ml; and
3. Made from at least 85% of any of the following:
a. Dibromotetrafluoroethane (CAS 25497-30-7, 124-73-2, 27336-23-8);
b. Polychlorotrifluoroethylene (oily and waxy modifications only); or
c. Polybromotrifluoroethylene;
d. Fluorocarbon fluids designed for electronic cooling and having all of the following:
1. Containing 85% by weight or more of any of the following, or mixtures thereof:
a. Monomeric forms of perfluoropolyalkylether-triazines or perfluoroaliphatic-ethers;
b. Perfluoroalkylamines;
c. Perfluorocycloalkanes; or
d. Perfluoroalkanes;
2. Density at 298 K (25°C) of 1.5 g/ml or more;
3. In a liquid state at 273 K (0°C); and
4. Containing 60% or more by weight of fluorine.
Note 1.C.6.d. does not apply to materials specified and packaged as medical products.