Kinotannic acid
Names
Other names
Coccotannic acid
kino-tannic acid
Identifiers
Properties
C18H18O8[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Kinotannic acid is the chief constituent of the kino gum, of which it contains 70 to 80 per cent. Kino also contains kino red, a phlobaphene produced from kinotannic acid by oxidation.[2] It is closely related to the tannin from catechu; its non-glucosidal nature was established by Bergholz.[3][4]

Properties

When dry distilled it yields pyrocatechine and protocatechinic acid.[5]

It is soluble in water. Solutions are precipitated by lead or copper salts.

Kinotannic acid is degraded by oxidation when exposed to air.

References

  1. ↑ Pterocarpi Lignum - Red Sandal Wood. -The Wood Of Pterocarpus Santalinus. From Ceylon on chestofbooks.com
  2. ↑ Pterocarpus on www.henriettes-herb.com
  3. ↑ Dissert. Dorpat, 1884
  4. ↑ Kino (U. S. P.)—Kino. on www.henriettes-herb.com
  5. ↑ Holdsworth, David; Gideon, Osia; Pilokos, Bospidik (January 1989). "Traditional Medicine of New Ireland, Papua New Guinea Part III Konos, Central New Ireland". International Journal of Crude Drug Research. 27 (1): 55–61. doi:10.3109/13880208909053938.


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