From: "Stuart, Ralph" <Ralph.Stuart**At_Symbol_Here**KEENE.EDU>
Subject: Re: [DCHAS-L] Upper limit of pH hazards
Date: Mon, 31 Oct 2016 17:15:04 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 7902331B-A8ED-4812-BD77-584064F6CDD5**At_Symbol_Here**
In-Reply-To <67518ED493A5794FB21A7CA33CD03C7A1BBF8857**At_Symbol_Here**>

>why would one work actively in a chemistry lab without gloves?

The 3D printer pieces will not be used in the lab setting; there is concern that the printed pieces could have micropores that retain corrosive liquids longer than other types of materials. The student project will be to determine the pH of the rinse water after each rinse to see how long it takes to reach a "safe" level for the piece to leave the lab and enter the world of things. Hence the question of what "safe" means.

Thanks to everyone for helping me to refine the question.

- Ralph

Ralph Stuart, CIH, CCHO
Chemical Hygiene Officer
Keene State College


This e-mail is from DCHAS-L, the e-mail list of the ACS Division of Chemical Health and Safety.
For more information about the list, contact the Divisional secretary at secretary**At_Symbol_Here**

Previous post   |  Top of Page   |   Next post

The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.