[Nhcoll-l] Experience with (which concentration of) DMDM Hydantoin for fixation?

[A.J.van_Dam at lumc.nl]

Dear Sidsel,



I would always recommend to wear (nitrile) gloves when touching preserved specimens.

DMDMH is a formaldehyde releasing agent which is more effective as a preservative than as a fixative, due to the very low amount of free formaldehyde. In Europe, it is regarded to be safe for use in personal care and cosmetic products (shampoo, hand soaps, lotions) when the level is less than 0.6%. As a specimen preservative, a concentration between 2.5 and 5 % should be more than sufficient.



Kind regards,



Dries
Andries J. van Dam, conservator

Museum of Anatomy
Leiden University Medical Center
Building 3 (V3-32)
P.O.Box 9600
2300 RC Leiden
The Netherlands
tel: +31 (0)71 52 68356
E-mail: A.J.van_Dam at lumc.nl<mailto:A.J.van_Dam at lumc.nl>
Visiting address: Hippocratespad 21
Scientific associate Natural History Museum London
http://www.nhm.ac.uk<http://www.nhm.ac.uk/>
Directory Board member ICOM-CC
http://www.icom-cc.org<http://www.icom-cc.org/>

Director Alcomon Company
http://www.alcomon.com<http://www.alcomon.com/>







-----Original Message-----
From: nhcoll-l-bounces at mailman.yale.edu [mailto:nhcoll-l-bounces at mailman.yale.edu] On Behalf Of Sidsel Marie Willemann
Sent: dinsdag 25 februari 2014 12:50
To: nhcoll-l at mailman.yale.edu
Subject: [Nhcoll-l] Experience with (which concentration of) DMDM Hydantoin for fixation?



Dear all,



For preparing specimens (amphibians and like) for the school service at the museum I work at, I need to use DMDM Hydantoin as a fixative instead of Formaldehyde as one usually does. This is due to health regulations (the children are to touch the specimens).. Does any of you have experience with using DMDM Hydantoin? - what concentration to make? Afterwards the specimens will be preserved in Steedmans PFP solution..





Best regards,



Sidsel Willemann



Natural History Museum of Denmark





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