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Hydrogen Cyanide (HCN) Gas Detectors

Hydrogen cyanide (HCN) is a highly toxic chemical compound. It can be found in liquid form below 78°F (25.6°C) or as a colorless gas above 78°F (25.6°C). HCN is used in many processes, such as fumigating, electroplating, mining, chemical synthesizing, and producing synthetic fibers, plastics, dyes, and pesticides. Hydrogen cyanide may be released during reactions between cyanide and acid or during a nitrile fire or combustion. Hydrogen cyanide is extremely flammable and most often detected in its toxic form with an HCN gas detector.


Characteristics of Hydrogen Cyanide

Hydrogen cyanide is a colorless to pale blue liquid or gas. It has a distinct odor resembling bitter almonds. Hydrogen cyanide is particularly dangerous because of its toxic/asphyxiating effects on all life that requires oxygen to survive. HCN combines with the enzymes in tissue associated with cellular oxidation, rendering oxygen unavailable to the tissues and causing death by asphyxia. This suspension only lasts while the cyanide is present. Upon its removal, normal function is restored provided death has not occurred.

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Will explode, LEL 5.6%
Extremely toxic
Formonitrile, Hydrocyanic acid, Prussic acid
Exposure limits:
PEL\TWA: 10 ppm
IDLH: 50 ppm / 30 min.
Used in the leaching of precious metals, i.e. gold, chemical plants, insecticides

Effects of Various HCN Levels

HCN Level in PPM
Resulting Conditions on Humans
Permissible Exposure Limit (OSHA).
Headache, dizziness, unsteadiness.
Feeling of suffocation, nausea.
Death from exposure in 30 to 60 minutes.

How to Detect Hydrogen Cyanide

Industrial Scientific provides the GasBadge® Pro personal single-gas detector, the Ventis® Pro5 and the MX6 iBrid® multi-gas detectors, and the Radius® BZ1 Area Monitor to accurately monitor unsafe levels of hydrogen cyanide.

Area Monitor

Radius BZ1

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Multi-Gas Monitor

Ventis Pro5

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Multi-Gas Monitor

MX6 iBrid

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Single-Gas Monitor

GasBadge Pro

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