Moisture indicator for a respiratory protection device

Details Moisture indicator for a respiratory protection device Moisture indicator for a respiratory protection device

1991-10-10

1993-03-16

Housel, James C.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

422 88, 422120, 422122, 116 2, 12820222, 12820226, 12820528, A62B 708, G01N 2175

Patent

active

051942240

ABSTRACT:
A moisture indicator for indicating the state of moisture loading of an oxygen-releasing chemical in a respiratory protection device which contains the peroxide of an alkali metal as the substance is to be improved such that it will indicate an irreversible and clearly recognizable color change and will respond to the intrusion of even small amounts of moisture. To accomplish this task, the substance contains as the reactive substance an additive in the form of an alkali metal ozonide that engages in a color reaction with moisture present in the air.

REFERENCES:
patent: 4019509 (1979-04-01), Li et al.
Shereshovets, V. V. et al. "Chemiluminescence in the reaction of alkali metals ozonides with water", Izv. Akad. Nauk SSSR, Ser. Khim., (12), p. 2879, 1988.
Firsova, T. P. et al. "Reaction between potassium ozonide, water vapor, and carbon dioxide", Izv. Akad. Nauk SSSR, Ser. Khim; (5), pp. 973-976, 1967.

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