Hipposudoric acid

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Hipposudoric acid
Hipposudoric acid.png
IUPAC name
3-Carboxymethyl-5-hydroxy-1,4,8-trioxo-4,8-dihydro-1H-fluorene-9-carboxylic acid
  • 851367-73-2 ☒N
3D model (JSmol)
  • InChI=1S/C16H8O8/c17-6-1-2-7(18)11-10(6)13-12(14(11)16(23)24)8(19)3-5(15(13)22)4-9(20)21/h1-3,17H,4H2,(H,20,21)(H,23,24) checkY
  • c1cc(=O)c-2c(c3=c(c2c1O)c(=O)c(cc3=O)CC(=O)O)C(=O)O
Molar mass 328.232 g·mol−1
Appearance Red
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)
Infobox references

Hipposudoric acid is a red pigment found in the skin secretions of the hippopotamus;[1] although the secretions are often known as "blood sweat" (thus the name "hipposudoric", referring to "hippo sweat"), they are neither blood nor sweat.

Like its orange-colored analog norhipposudoric acid, hipposudoric acid functions both as a natural sunscreen and as an antimicrobial agent. It is derived from the oxidative dimerization of homogentisic acid.[2]

Norhipposudoric acid


  1. ^ Kimiko Hashimoto; Yoko Saikawa; Masaya Nakata (2007). "Studies on the red sweat of the Hippopotamus amphibius" (PDF). Pure Appl. Chem. 79 (4): 507–517. doi:10.1351/pac200779040507.
  2. ^ Moriya Kai; Matsuura Masanori; Saikawa Yoko; Hashimoto Kimiko; Yamaguguchi Ayumu; Sakamoto Kazuhiro; Akihisa Narito; Hirata Hiroyoshi (2006). "Properties of the enzyme responsible to the synthesis of hipposudoric and norhipposudoric acids, the pigments in the red sweat of the hippopotamus". Nippon Kagakkai Koen Yokoshu. 86 (2): 1314.