Trichloroisocyanuric acid burning at Port Metro Vancouver - Action News
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British Columbia

Trichloroisocyanuric acid burning at Port Metro Vancouver

The substance burning at Port Metro Vancouver is a highly reactive acid that is dangerous if inhaled.

Fire began at Port Metro Vancouver Wednesday afternoon

The acid is burning at Port Metro Vancouver just east of the Helijet terminal. (Barry Duncan/Twitter)

The substance burning at Port Metro Vancouver is a highly reactive chemical called trichloroisocyanuric acid, confirmed Vancouver Coastal Health.

It is a white, sand-like powder used to kill bacteria. It's not combustible, but is described as a "dangerous explosion hazard" when it reacts with other substances, or is heated.

The acid "gives off irritating or toxic fumes (or gases) in a fire," including chlorine gas, according to safety information posted by the Centres for Disease Control and Prevention in the U.S.

A material safety datasheet for the acid said it is harmful if inhaled, and could cause damage to the kidneys, liver, respiratory, eyes and skin.

Cover eyes and mouth to reduce exposure

People living in Vancouver east of Main Street and north of East 1st Avenueare told to close their windows and remain inside, said Vancouver police in a statement.

A spokesperson for Vancouver Coastal Health described the acid as a "respiratory irritant," that irritates eyes and lungs, but is only dangerous in large amounts.

"If you need to go outside, cover your eyes and mouth with a wet cloth," said Viola Kaminski of Vancouver Coastal Health.

With files from Paisley Woodward and Lisa Johnson