SINGAPORE - Eleven workers were taken to hospital after being exposed to a chemical leak at a wafer fabrication plant in Kallang Way on Tuesday (July 18).

The Straits Times understands that the leaked gas was nitrogen trifluoride - a colourless, odourless and non-flammable gas used in the plasma etching of silicon wafers.

The affected workers, who were taken to Tan Tock Seng Hospital, suffered from minor skin irritation, said labour MP Melvin Yong in a Facebook post on Tuesday night. In the post, he expressed relief that all the workers have been "given the green light to be discharged".

All the affected workers were from RF360 Singapore - a joint venture between American telecommunications equipment company Qualcomm and electronics company TDK, which is based in Japan.

Mr Yong, who is tripartism director at the National Trades Union Congress (NTUC), said that RF360 is a unionised company under @UWEEI Singapore.