Indicator for ethylene oxide gas

Details Indicator for ethylene oxide gas Indicator for ethylene oxide gas

1977-02-15

1978-06-13

Serwin, R.E.

Chemistry: physical processes

Physical processes

Crystallization

23253TP, 21DIG4, 116114AM, 252408, G01N 2112

Patent

active

040946428

ABSTRACT:
An indicator composition for ethylene oxide gas comprises 4-(4-nitrobenzyl) pyridine, nitrocellulose, a basic substance, and, optionally, a blue coloring agent.
The indicator composition, when exposed to ethylene oxide gas, changes its color to develop a stable color indication, typically of a green color. The composition can take any shape and form, and is typically applied to a substrate such as paper to form a layer thereon.

REFERENCES:
patent: 3627469 (1971-12-01), Cheng
patent: 4015937 (1977-04-01), Miyamoto

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