Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p76
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
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Character Range: 217613–220408

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;
1. C. 006. 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;
1. C. 006. d. 3. In a liquid state at 273 K (0°C); and
4. Containing 60% or more by weight of fluorine.
Technical Note:
For the purpose of 1C006:
1. 'Flash point' is determined using the Cleveland Open Cup Method described in ASTM D‑92 or national equivalents;
2. 'Pour point' is determined using the method described in ASTM D‑97 or national equivalents;
3. 'Viscosity index' is determined using the method described in ASTM D‑2270 or national equivalents;
4. 'Thermal stability' is determined by the following test procedure or national equivalents:
 Twenty ml of the fluid under test is placed in a 46 ml type 317 stainless steel chamber containing one each of 12.5 mm (nominal) diameter balls of M‑10 tool steel, 52100 steel and naval bronze (60% Cu, 39% Zn, 0.75% Sn);
 The chamber is purged with nitrogen, sealed at atmospheric pressure and the temperature raised to and maintained at 644 ± 6 K (371 ± 6°C) for six hours;
 The specimen will be considered thermally stable if, on completion of the above procedure, all of the following conditions are met:
a. The loss in weight of each ball is less than 10 mg/mm2 of ball surface;
b. The change in original viscosity as determined at 311 K (38°C) is less than 25%; and
c. The total acid or base number is less than 0.40;
5. 'Autogenous ignition temperature' is determined using the method described in ASTM E‑659 or national equivalents.
1. C. 007. Ceramic powders, ceramic‑"matrix" "composite" materials and 'precursor materials', as follows:
N.B.: SEE ALSO 1C107.
a. Ceramic powders of titanium diboride (TiB2) (CAS 12045‑63‑5) having total metallic impurities, excluding intentional additions, of less than 5,000 ppm, an average particle size equal to or less than 5 µm and no more than 10% of the particles larger than 10 µm;
b. Not used;
1. C. 007. c. Ceramic‑"matrix" "composite" materials as follows:
1. Ceramic‑ceramic