Safety Emporium eyewashes
Safety Emporium eyewashes

Interactive Learning Paradigms, Incorporated

DCHAS-L Discussion List Archive

About This Archive  |   DCHAS-L 2019 Index   |   DCHAS-L Yearly Index   |   DCHAS-L Home Page

About This Archive

DCHAS-L 2019 Index

DCHAS-L Yearly Index

DCHAS-L Yearly Index

DCHAS-L Home Page
From: "Klotz, Ann" <klotz**At_Symbol_Here**SIENA.EDU>
Subject: Re: [DCHAS-L] Iodine clock reaction waste
Date: Fri, 11 Oct 2019 08:16:49 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: CANOW4ca7Nckxq8x05obkHGH9B+57-h-L+hDEfUE59DrmErCPRQ**At_Symbol_Here**mail.gmail.com
In-Reply-To

Demystify: 

Pamela,

Any drain disposal of chemicals should be evaluated by your local water authority.

Ann

On Thu, Oct 10, 2019 at 11:49 AM Pam Auburn <aubu**At_Symbol_Here**hotmail.com> wrote:

I was wondering if anyone here has experience with this reaction and the proper waste disposal

IO3- + 3 HSO3- --> I- + 3 SO4-2 + 3 H+

IO3- = 8 I- + 6 H+ --> 3 I3- + 3 H2O

I3- + HSO3- + H2O --> 3 I- + SO4-2 + 3 H+

2 I3- + starch --> starch-I5- complex (blue)



I saw from something published in 1996 "For disposal of waste products, combined all of the solutions used in this experiment with solid sodium thiosulfate until the mixture is no longer blue. The resulting clear mixture can then be discarded by flushing down the drain upon the addition of water."

Mitchell, R.S. Iodine Clock Reaction. J. Chem. Educ., 1996, 73 (8), 783.

Is this still acceptable?


Thanks

Pamela Auburn, PhD
2041 Branard
Houston TX 77098
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas


--
Ann Klotz
School of Science
Siena College
515 Loudon Road
Loudonville, NY 12211-1462

Office Phone: 518-783-2402
Cell Phone 518-860-8489
Siena College is a learning community advancing the ideals of a liberal arts education, rooted in its identity as a Franciscan and Catholic institution.

CONFIDENTIALITY NOTICE: This e-mail, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure, or distribution is prohibited. If you received this e-mail and are not the intended recipient, please inform the sender by e-mail reply and destroy all copies of the original message.
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas

Previous post   |  Top of Page   |   Next post