[Histonet] Expiration dates of ammonium sulphide

Wed Dec 16 15:18:55 CST 2015

Dear Mr. Morken,

I found your thread on Histonet regarding ammonium sulfide for muscles. We are running a panel including ATPase every week and have been having problems with the manufacturer with the supply. As of today we were told by FISHER that they are back ordered indefinitely.

What company are you using to buy the 25 ml bottle? I also see you stated back in 2010 that the concentration doesn't matter, but just so you have the information we are using 21% aqueous ammonium sulfide light (as stated on the bottle).

I hope you are still at this email address!

Thank you in advance for any help you can provide.


Karen P. Bryan, HT (ASCP)cm
Sr. Neurohistology Specialist
Department of Pathology/Amory 3
Brigham & Women's Hospital
75 Francis Street/Boston
(Internal extension 2-7534)

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