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From: Pemberton, Drew (apemberton**At_Symbol_Here**uidaho.edu) <0000231dd2f469c4-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Phenolphthalein or Replacement?
Date: Nov 11, 2025 22:13 UTC
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: <CY4PR04MB125563DE6C16902313063117A7CFA**At_Symbol_Here**CY4PR04MB1255.namprd04.prod.outlook.com>
In-Reply-To: <B1547748-6F51-4327-9161-C9E144D1F732**At_Symbol_Here**utdallas.edu>
All,
Related question to phenolphthalein; my experience with it is that is it very commonly used as a pH indicator, particularly in general chemistry titration labs.
According to the SDS, phenolphthalein is considered a reproductive hazard and a carcinogen (category 2 for both). How do you handle this when it comes to classifying this as a PHS under OSHA’s 29 CFR 1910.1450(e)(3)(viii)? Do you switch
to using something else, or is the exposure more concentration dependent? I’m starting to think about this as I’m working on a pregnancy in lab policy for my institution, and general chemistry tends to be where we see the highest volume of students who could
potentially be or become pregnant.
Regards,
|
DREW PEMBERTON |
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Physical Address:1108 W 6th St | Moscow ID 83844 | United States |
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From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
On Behalf Of Leach, Patricia
Sent: Tuesday, November 11, 2025 9:12 AM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: Re: [DCHAS-L] Phenolphthalein or Replacement?
We dispose of it as hazardous waste. Patricia Leach Lab Manager Department of Chemistry & Biochemistry University of Texas at Dallas Cell: (469) 891-6426 On Nov
11, 2025, at 10: 29 AM, Jack Reidy <jreidy2@ stanford. edu>
wrote: Hi all,
We dispose of it as hazardous waste.
Patricia Leach
Lab Manager
Department of Chemistry & Biochemistry
University of Texas at Dallas
Cell: (469) 891-6426
On Nov 11, 2025, at 10:29 AM, Jack Reidy <jreidy2**At_Symbol_Here**stanford.edu> wrote:
