A chemical leak occurred at an office building at 166 Kallang way on July 18.
The Singapore Civil Defense Force were alerted to the issue at 2.11pm.
Nine people were reportedly injured.
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SCDF said the leak is "contained within a sealed production room on the premises", and has since been shut off around 3pm.
Occupants within the premises include Epcos, Qualcomm and Shell Solar.
Two fire engines, one fire bike, three support vehicles and two ambulances were dispatched to the scene, along with Hazmat (hazardous materials) officers.
Members of the public are urged to avoid the area.
This isn't the first chemical leak in Singapore.
Earlier in 2017, a chemical leak occured at Shell's Pulau Bukom manufacturing site.
The chemical leaked was not known as there was commercial confidentiality. Mitigation measures were immediately taken and no one was injured.
Top image via Google Maps
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