During the chemical incident in Oxford the firefighters were decontaminated and subsequent crews were sent in wearing in breathing apparatus to contain and remove the mixture before it was disposed of safely.
Oxfordshire fire and rescue service said the incident serves as a timely reminder that all packaging on household products should be read before they are used.
It added that no mixing of chemicals, particularly bleaches and “un-blockers”, should ever take place as potentially toxic and corrosive mixtures can be created.
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