This issue came up for me recently in a consulting assignment I had, and no one gave me a good answer. Many chemicals belong in more than one hazard category (I believe there are nine total) and no one has indicated an order priority in how it is to be listed. Maybe there isn’t an order and the user has to be aware that the chemical has multiple, simultaneous hazards. Any further thoughts or references on this matter you would care to share would be greatly appreciated.
Armen S. Casparian
Professor, Dept. of Sciences
Wentworth Institute of Technology
Boston, MA 02115
Mobile Home of “The Law of Unintended Consequences.”
Law of Unknown Origin: “There will always be more questions than answers.”
What about multiple symbols? Which take precedence?
EH&S Technician - Hazardous Waste Coordinator
Weyerhaeuser Technology Center
Well, then there's the flammable symbol... 70% ethanol is going to be flammable, still, but isn't pyrophoric. In an organic chem lab, I would store pyrophorics separately from 70% ethanol, but the GHS symbol is the same...
On Tue, Jul 23, 2013 at 3:29 PM, Ralph B. Stuart <rstuart**At_Symbol_Here**cornell.edu> wrote:
> The only problem is for the corrosive class, that contains acids and bases. So you can not rely completely on GHS for storage, as these products are not compatible.
Good point; I thought of that after I sent the e-mail.. I wonder if there are other examples of incompatibilities within GHS classes (for example, explosives?).
Ralph Stuart CIH
Chemical Hygiene Officer
Department of Environmental Health and Safety
Margaret A. Rakas, Ph.D.
Manager, Inventory & Regulatory Affairs
Clark Science Center
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