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Subject:
Re: [DCHAS-L] DCM Commentary?
Date:
Nov 10, 2025 13:51 UTC
Author:
Gmurczyk, Marta <00001fa03b1fa040-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
From:
David EldrEdge <Dave.EldrEdge**At_Symbol_Here**NALTIC.COM>
Subject:
[DCHAS-L] Phenolphthalein or Replacement?
Date:
Nov 10, 2025 14:07 UTC
Reply-To:
ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID:
<CAFCR6uZ38qew20uN1qVSmN10ZBmt-5H6bwX2iBMCzRXv-tkzpQ**At_Symbol_Here**mail.gmail.com>
In-Reply-To:
<DS0PR10MB6893A603891CD0914BB3900C9EC1A**At_Symbol_Here**DS0PR10MB6893.namprd10.prod.outlook.com>
Our School's EHS responded to a question that was brought up about phenolphthalein:
"I verified this with the wastewater district, and they confirmed that it [phenolphthalein] cannot be disposed of down the drain. I want to be cautious here if we start discharging materials improperly, it could trigger a wastewater audit and potentially open Pandora’s box for the college."
What do you all do? Are you still using phenolphthalein or have you replaced phenolphthalein with something like bromthymol blue or something similar? Do you get the same results or better?
or...
Are you still using phenolphthalein, if so how do you deal with the waste? If collecting the waste, is it worth the cost of disposal?
Warm regards,
David EldrEdge
Co-Owner
NALTIC Industrials, LLC
888.891.0077 Main
435.503.4972 Cell
435.767.7714 Google Voice & Text
435.654.2727 Fax
ᐧ
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