You are probably right. Ammonium chloride "smoke cookies" are still used in some non-union theater productions for smoke. I participated in the first NIOSH study of these in 1981 and air samples showed that some of the ammonium chloride fume is dissociated into ammonia and hydrochloric acid in the heating process. So I don't know just how "not toxic" the smoke was in this case.
From: Richard Rosera <richardrosera**At_Symbol_Here**GMAIL.COM>
To: DCHAS-L <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Sent: Sat, Sep 9, 2017 7:10 am
Subject: [DCHAS-L] Hazmat Scare at U. S. Nonwovens
"The building just basically got filled full of smoke and started burning our eyes and stuff," said Blake Colbin, who just started working at the U.S. Nonwovens plant at 1 Sandbank Road two months ago.
"I left my phone, wallet, everything in there. I got out as quick as possible. Yeah, it was little scary," Colbin said.
The fumes were created in the making of a drain cleaner, warehouse manager Pete Kohlmorgen said. U.S. Nonwovens is known for making household cleaning products.
Kohlmorgen insisted it was safe.
"The product is not toxic. It's not combustible. It=E2=80™s not explosive. There was nothing that leaked onto the ground. Everything is completely, 100 percent contained," Kohlmorgen said.
A hazmat crew, two fire departments and the Kentucky EPA vouched for the safety inside the building.
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