An Army Bomb Disposal Team made safe a quantity of unstable Dinitrophenylhydrazine at Scoil Caitriona, Mobhi Road, Glasnevin, Dublin 11 this morning.
The Defence Forces deployed the team to the school, where the unstable chemical had been found during a routine audit of chemicals at the laboratory.
The team arrived on scene at 11am and removed the chemical from the building. The Bomb Disposal Team carried out a controlled explosion in order to make the chemical safe.
The scene was declared safe at 12.20pm.
Dinitrophenylhydrazine is a chemical re-agent and is routinely used in laboratories but can crystallise and become unstable and sensitive to heat or friction.
This is the 27th call-out for the Explosive Ordnance Disposal (EOD) teams in 2012 and the first dealing with a hazardous material.