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Tannic Acid: Powdered Galls Extracted with Ether and Alcohol (75:25)
Charlie

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Charlie

21. Ukwakira 2026DE
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Tannic Acid: Powdered Galls Extracted with Ether and Alcohol (75:25)

Pelouze's way of getting tannic acid from galls uses ether; Thorpe's Dictionary (1913) notes that a mixture of 75 % ether and 25 % alcohol can be used in its place. The extract separates into two layers, and the lower one, a strong tannic acid solution, dries to a porous mass. No amounts are given. Ether is very flammable: no flame, fume hood. The picture: our diagram.
Hagati
1 day

Amabwiriza

1

Powder the galls

Grind oak galls finely. Ours: a mortar.

Ibikoresho by'iyi ntambwe:

Utubyimba tw'umwaloniUtubyimba tw'umwaloni1 as required

Ibikoresho bikenewe:

Isekuru n'Umuhini by'IbuyeIsekuru n'Umuhini by'Ibuye
2

Extract with 75 % ether, 25 % alcohol

Mix 75 parts commercial ether with 25 parts alcohol and extract the powder with it. Ours: shake in a stoppered bottle in a fume hood, away from any flame.

Ibikoresho bikenewe:

Dietili etereDietili etere
Etanoli - urwego rw'ubushakashatsi, 95 %Etanoli - urwego rw'ubushakashatsi, 95 %
Igipimo cy'ikirahure gifite imirongoIgipimo cy'ikirahure gifite imirongo
Amacupa y'ikirahuri afite ibipfundikizoAmacupa y'ikirahuri afite ibipfundikizo
Akabati k'umwotsi (gafite umuyoboro)Akabati k'umwotsi (gafite umuyoboro)
Amadarubindi yo Kwirinda IbinyabutabireAmadarubindi yo Kwirinda Ibinyabutabire
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
3

Keep the lower layer and evaporate it

The extract separates into two layers: gallic acid, wax and resins in the upper, a strong tannic acid solution in the lower. Evaporate the lower layer to a porous mass. Ours: separatory funnel, evaporating dish on a water bath.

Ibikoresho bikenewe:

Umufunuro utandukanyaUmufunuro utandukanya
Isahani yo kumishaIsahani yo kumisha
Ubwogero bw'AmaziUbwogero bw'Amazi
Akabati k'umwotsi (gafite umuyoboro)Akabati k'umwotsi (gafite umuyoboro)

Ibikoresho

1

Ibikoresho bikenewe

11

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Tannic Acid: Powdered Galls Extracted with Ether (Pelouze, Pharmacopoeia Form)

Tannic Acid: Powdered Galls Extracted with Ether (Pelouze, Pharmacopoeia Form)

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