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).
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
- ^ Pterocarpi Lignum - Red Sandal Wood. -The Wood Of Pterocarpus Santalinus. From Ceylon on chestofbooks.com
- ^ Pterocarpus on www.henriettes-herb.com
- ^ Dissert. Dorpat, 1884
- ^ Kino (U. S. P.)—Kino. on www.henriettes-herb.com
- ^ 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.