Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Hydrolysis

Cyanogen chloride is extremely volatile from water surfaces and hydrolyzes rapidly. Under alkaline conditions, the substance reacts to CNO(-) and forms hydrochloric acid and cyanic acid (1/3). Cyanogen chloride is unstable in raw surface waters; half-lives ranging from 1 minute 45 seconds to 10 hours at 5 deg C in ambient waters (2) and 5.25 hrs at pH 8 at 20 deg C(3) have been reported. Hydrolysis Rate constant at pH 7 is about 4 X 10-3 mols-1sec-1.

Phototransformation in water

Cyanogen chloride does not contain chromophores that absorb at wavelengths > 290 nm and therefore, is not expected to be susceptible to direct photolysis by sunlight.

Biodegradation

Cyanogen chloride is extremely volatile and hydrolyzes rapidly, suggesting that biodegradation will not be an important environmental fate process.

Bioaccumulation

Cyanogen chloride is extremely volatile and hydrolyzes rapidly, suggesting that bioconcentration will not be an important environmental fate process.

Transport and Distribution

The high volatility and rapid hydrolysis of cyanogen chloride would suggest that adsorption to soil and sediment is not an important environmental fate process.

Additional information