From: Ralph Kowatsch Ralph.Kowatsch@umanitoba.ca Sent: Thursday, July 6, 2023 2:16 PM To: Alina Skorobohatova Alina.Skorobohatova@umanitoba.ca Subject: Plant Science Chemical Inventory Check

Hi Alina Please forward to all staff Thanks Ralph

Considering the incident in the Chemistry Department with 2,4-Dinitrophenylhydrazine (DNPH) last week and our upcoming inspections please be aware of the hazards of the chemicals in your labs. Make sure you have a SDS for each chemical and understand the hazard. The WHMIS symbol for DNPH only indicates that it is an irritant, only further in the SDS text does it indicate that it is a potential explosive. Be aware that many explosive compounds contain Nitro groups.