From: DCHAS Membership Chair <membership**At_Symbol_Here**DCHAS.ORG>
Subject: [DCHAS-L] wondering where the yellow went
Date: Thu, 20 Aug 2020 09:28:57 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: 1B5C0032-949B-4200-A413-C988C082BCFE**At_Symbol_Here**

From: Monona Rossol
Re: wondering where the yellow went

Phytic acid is described in the literature as a yellow to brownish liquid. There is a thread on the American Institute for Conservation's (AIC) forum about art conservators switching away from Sigma's phytic acid more brownish acid to another provider's whose phytic acid is pale yellow. The assumption is the Sigma product has "degraded."

Danged if I have a clue. I just know as vegetarian, I eat more of it than they do. Does anyone out there have a clue what this reagent color difference actually is?


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