A woman who went into cardiac arrest while undergoing a botched breast surgery at a Sydney beauty salon has died.

Key points: Jean Huang managed Chippendale beauty salon where procedure was performed

Jean Huang managed Chippendale beauty salon where procedure was performed Jie Shao administered anaesthetic, breast filler to Ms Huang

Jie Shao administered anaesthetic, breast filler to Ms Huang Shao, who has no medical qualifications in Australia, is charged

Jean Huang, 35, who managed the salon, underwent the procedure at the Medi Beauty Clinic in Chippendale on Wednesday and died at the Royal Prince Alfred Hospital yesterday afternoon.

A Chinese tourist, 33-year-old Jie Shao, administered a local anaesthetic and breast filler to Ms Huang, despite having no medical qualifications in Australia.

Inquiries are continuing with a view to further legal action being considered, NSW Police said.

Shao's bail application was refused on Thursday by magistrate Sharon Freund, who said police had a strong case against her.

Jean Huang was the manager at the Medi Beauty Clinic in Chippendale. ( ABC News )

Police said Shao had a plane ticket to leave Sydney for China.

"She has made a number of admissions in relation to local anaesthetics and breast fillers," Ms Freund said.

The magistrate rejected assurances from the tourist's legal aid solicitor that she had qualifications from the Canton (Guangdong) Medical University.

"These are very serious charges with a maximum of 10 years in jail," she said.

"As Ms Shao is a tourist she is clearly a flight risk and risk to the community."

The police prosecutor said it was a strong case "with admissions on electronic recordings".

The Australasian College of Cosmetic Surgery (ACCS) issued a public warning following the incident and said the issuing of cosmetic injections in beauty salons around Australia needed proper regulation.