The proposal is based on screening assessments carred out by Environment Canada over the past several years on a number of substances. The proposed designation is based on the carcinogenicity and aquatic toxicity of hydrazine.
If hydrazine is added to Schedule 1, the Minister of the Environment will have until December 26, 2012 to publish proposed regulations controlling the use of hydrazine in Canada, and a further six months to finalize those regulations.
This regulatory development is of particular importance to the electricity generation sector, as hydrazine is very widely used in boiler chemistry. Environment Canada estimates that 87% of the hydrazine now used in Canada is used as a corrosion inhibiter or oxygen scavenger in power generation.