‘‘Drug types such as this are generally through peer supply, mates to mates, and the initial purchase is generally over the internet,’’ Detective Superintendent Bingham said.

Head of the Drug Squad Detective Superintendent Nick Bingham said a request was being made to the state government to have the substance placed on the prohibited list.

The synthetic substance, known as either 25B-NBOMe or 25I-NBOMe, first came to the attention of NSW police in March and is believed to be manufactured in China.

Henry Kwan is understood to have allegedly bought the substance from a classmate at Killara High School on the belief it was LSD and then ingested it on Wednesday afternoon.



His family told police that the teen began acting erratically as soon as he arrived home, removing all his clothes and appeared to be in some kind of drug-induced psychosis.



The teenager then was involved in a tense standoff with his mother and sister on the balcony of the family’s Killara Avenue apartment, which drew neighbours outside to see the commotion.



His mother and sister then tried desperately to stop him as shocked neighbours watched on as he jumped from the third floor balcony to his death. An ambulance arrived a short time later but Henry could not be revived.



His classmates were told of his death when they arrived at school on Thursday morning. Henry was preparing to do the Higher School Certificate and was a top student.



Police say there have been other recent cases of teenagers and young adults acting recklessly after ingesting the synthetic hallucinogenic substances 25B-NBOMe and 25I-NBOMe, including a number of teenagers who stripped naked and ran through the streets of Sydney’s north shore earlier this year.

Nick Mitchell, 15, took a similar style substance and died in his central coast bedroom last year, while his friend was hit by a car after running into its path having also consumed the drug.

Following Henry’s death an 18-year-old was charged with supplying a prohibited drug. He was granted granted conditional bail to appear in Hornsby Local Court on July 3.

Superintendent Bingham said: ‘‘The illegality in selling this drug is purporting this drug to be a prohibited drug –purporting this drug to be a drug called LSD is the same as selling LSD."