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Zirconium powder, wetted with not less than 25 percent water (a visible excess of water must be present) (a) mechanically produced, particle size less than 53 microns; (b) chemically produced, particle size less than 840 microns

Zirconium powder, dry

Zirconium hydride

Titanium powder, wetted with not less than 25 percent water (a visible excess of water must be present) (a) mechanically produced, particle size less than 53 microns; (b) chemically produced, particle size less than 840 microns

Titanium powder, dry

Titanium hydride

Sodium superoxide

Sodium sulfide, anhydrous or Sodium sulfide with less than 30 percent water of crystallization

Sodium peroxide

Sodium hydrosulfide, with less than 25 percent water of crystallization

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