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Carole ,
Hi , I am a chemist in the industrial for more than 33 years , I shared my experiences with followings to your requests
The explosion proof equipment said to be used as the chemical by nature with low flash point , it will have vapor of the chemical itself or the solvent for the chemical in danger with the open fire or the sparks created from electric on/off switching .
If you do not have the open fires within 25 meter from your location while the chemical is at uncapped or handling in open air . No electronics appliances is in lives and operating within 25 meter apart from the distance at uses of the chemical as well .
The ventilation system is the protections to the users at handling operations as chemical specified as hazards to users , if there is not a low flash point solvent , or it is just the corrosives , then it is not required for the explosion proof .
It is very commonly noticed the explosion proof is always requested at the ventilation system for any low flash point solvent .
I hoped the above information could be your helps .
Jimmy Kwok
From: DCHAS-L Discussion List
[mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of Dr. Jay A. Young
Sent: Tuesday, April 07, 2009 11:28 PM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: Re: [DCHAS-L] Sodium Azide
Carole,
The purpose of an MSDS is that it be read and that the hazards and precautions be understood as correct.
THEREFORE, IF THE PRECAUTIONS INCLUDE A STATEMENT THAT "THE EQUIPMENT HAD [SIC] TO BE EXPLOSION PROOF" THEN MAKE SURE THAT IT IS EXPLOSION PROOF.
If others reply to your inquiry indicating that they ignore such information in an MSDS, you can be CERTAIN that sooner or later they will not be able to answer any email inquiries until they re-build their facilities that were destroyed in an explosion.
Jay Young
**************************
----- Original Message -----
From:< /b> Carole Savoie
Sent: Monday, April 06, 2009 6:16 PM
Subject: [DCHAS-L] Sodium Azide
Good day everyone,
One of our researcher suddenly wants to use sodium azide in a chemical reaction. I’m aware of the risks associated with that chemical, but never used it as a chemist. If you have any “Thing to do or not do” experience or knowledge to share with us, we are very interested in reading them.
I read in the MSDS that the evacuation equipment had to be explosion-proof. I can understand why, but is it the case in your institutions?
Thanking you in advance for your responses!
Carole
_________________________________________
Carole Savoie, Ph.D. Chemistry
OHS Senior Consultant
Radiation Safety Officer
OHS Sector
=C9cole Polytechnique
C.P. 6079, succ. Centre-ville
Montr=E9al, Qu=E9bec
Canada, H3C 3A7
T=E9l: (514) 340-4711, poste 4547
Fax: (514) 340-4333
Carole.Savoie**At_Symbol_Here**polymtl.ca
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