Stains
Urates / uric acid



Topic Completed: 1 June 2005

Revised: 11 March 2019

Copyright: (c) 2003-2015, PathologyOutlines.com, Inc.
Page views in 2018: 330
Page views in 2019 to date: 170
Cite this page: Pernick N. Urates / uric acid. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/stainsurates.html. Accessed May 24th, 2019.
Definition / general
  • Uric acid crystals seen in acid urine
  • Urates present in tissue as sodium urate, but soluble in aqueous solutions and slightly soluble in weak alcoholic solutions, so tissue must be fixed in 95%/100% alcohol to prevent leaching of urates
  • Urates are stained black by GMS
  • Sodium urate crystals are birefringent on polarization
Microscopic (histologic) images

Image hosted on other servers:

Uric acid crystals, polarized, with red plate

Back to top