The mishap occurred at the chemical factory at Ambattur Industrial Estate late last night.
"There was a leak of the chemical, potassium silicate and when it exploded all of a sudden two workers were killed and one was injured," Police Inspector, Ambattur Industrial Estate, V Karnan told PTI.
The dead were identified as Murugavel, of Tiruvallur district and Ranjan, a native of Odisha, while the injured was identified as Vedamuthu.
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