Formalin is a formaldehyde solution usually 37% by wt formaldehyde and 10-15% methanol to prevent polymerization of the formaldehyde. paraformaldehyde is polymerized formaldehyde. I think for fixing FACS samples you want to usually avoid methanol (alcohols) that can result in the cells sticking together. Michael A. Egan, Ph.D. Wyeth Lederle Vaccines and Pediatrics Bldg. 180 Room 216-37 401 North Middletown Road Pearl River, NY 10965 Tel: 845-732-3036 Fax: 845-732-4941 eganm@WAR.Wyeth.com >>> athanasios p kakoulidis <kakoulidis@louisville.edu> 08/07 5:48 PM >>> Dear Flowers, does anybody know the difference between formalin and paraformaldehyde? thanks, Thanos P Kakoulidis, MD Research Fellow ICT, Ste 404 570 S Preston St Louisville, KY 40202 office tel: (502) 852 2065 office fax: (502) 852 2085 email: kakoulidis@louisville.edu
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