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]
| 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). | |
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.