AMHERST — New York authorities subpoenaed records this week from an Amherst company — Mass Terpenes — and two of its competitors, saying they’ve been selling vitamin E acetate oil linked to vaping illness.

Mass Terpenes has since scrubbed all references to the product Pure Diluent from its website, according to reporting by Rolling Stone, and has posted a warning telling consumers not to buy its products containing Vitamin E for the time being.

The company didn’t immediately respond to emails from The Republican Thursday.

Vapers use the oils to consume substances such as extracts laden with THC, the psychoactive element in marijuana.

On Wednesday, New York Gov. Andrew Cuomo issued a news release saying he directed the state’s Department of Health to issue subpoenas to companies marketing and selling “thickening agents” used in black market vaping products and to issue emergency regulations mandating that warning signs must be posted in all vape and smoke shops in New York State.

Additionally, Cuomo announced that he will advance new legislation to ban flavored e-cigarettes.

“Common sense says if you do not know what you are smoking, don’t smoke it, and right now we don’t know what you are smoking in a lot of these vaping substances,” Cuomo said in a prepared release. “The rise in vaping-associated illnesses is a frightening public health phenomenon and I am directing the Department of Health to take several actions to address this crisis, including starting an investigation into some of these companies that produce vaping substances to find out what’s in it and requiring that smoke and vape shops post a warning that lets people know that this is a risky activity. I am also going to propose new legislation that will ban flavored e-cigarettes. In the meantime our advice is quite simple: don’t do it because we don’t know if it’s safe.”

The New York State Department of Health Wadsworth Center lab obtained samples of thickeners from these three companies and determined that they are nearly pure vitamin E acetate oil, according to the release.

The companies being served with this subpoena and their product names are: Honey Cut Diluting Agent by Honey Cut Labs LLC in Santa Monica, California; Uber Thick by Floraplex Terpenes in Ypsilanti, Michigan; and Pure Diluent by Mass Terpenes in Amherst.

These are only the first companies to be subpoenaed, Cuomo said. More companies are likely to be ordered to provide samples as the investigation continues.

Nationally, health officials have identified about 450 possible cases of vaping-related illness in 33 states, including six deaths, according to The Associated Press.

Also this week, President Donald Trump called for a national ban on flavored e-cigarettes and vaping devices.

Massachusetts authorities have begun collecting data on vaping illness.