Chemistry:Hipposudoric acid
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| Preferred IUPAC name
3-(Carboxymethyl)-5-hydroxy-1,4,8-trioxo-4,8-dihydro-1H-fluorene-9-carboxylic acid | |
| Identifiers | |
3D model (JSmol)
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| Properties | |
| C16H8O8 | |
| 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). | |
 verify (what is   ?)
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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.[2] It is derived from the oxidative dimerization of homogentisic acid.[3]
It has been both widely and falsely reported that hipposudoric acid colors hippo milk pink. This is not the case; hippo milk is white or beige in color.[4]
References
- ↑ Kimiko Hashimoto; Yoko Saikawa; Masaya Nakata (2007). "Studies on the red sweat of the Hippopotamus amphibius". Pure Appl. Chem. 79 (4): 507–517. doi:10.1351/pac200779040507. http://media.iupac.org/publications/pac/2007/pdf/7904x0507.pdf.
- ↑ Yoko Saikawa; Kimiko Hashimoto; Teruyuki Komiya (2004). "The red sweat of the hippopotamus". Nature 429 (6990): 363. doi:10.1038/429363a. PMID 15164051.
- ↑ 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. http://sciencelinks.jp/j-east/article/200618/000020061806A0436283.php.
- ↑ "FACT CHECK: Is Hippopotamus Milk Pink?" (in en-US). https://www.snopes.com/fact-check/false-hippopotamus-milk-pink/.
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