Trichloroisocyanuric acid: What is it and why should you care?

Yesterday (March 4) may have been the first time you heard of trichloroisocyanuric acid. It's the chemical that's been burning since yesterday when a fire broke out in shipping containers at Port Metro Vancouver, prompting evacuations in the area.

If you're curious to know more about what it exactly is that's been burning, here's a brief summary of what the substance is and how it affect people (with information compiled from Thermo Fisher Scientific and the U.S. Centre for Disease Control and Prevention):

• Trichloroisocyanuric acid is described as a white, crystalline powder with a chlorine odour that is used to kill bacteria. It is used to treat water, such as in swimming pools, or to bleach textiles.

• It isn't combustible but it can enhance the combustion of other substances.

• When it burns, it releases chlorine gas.

• It is a skin, eye, and respiratory irritant. Some side effects of inhalation include coughing, sore throats, or breathing difficulties (including wheezing).

• It is toxic to aquatic organisms and it may negatively impact the aquatic environment over the long-term.

According to Vancouver Coastal Health, the highest risk is over. However, they point out that side effects may take up to 24 hours to manifest.

Anyone with pre-existing lung conditions (such as asthma) particularly should watch for any symptoms (as described above) to develop.

If you develop any symptoms, you should seek medical attention immediately from a walk-in clinic, family doctor, or emergency department.