• Micro

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Cyanotype Chemicals - Potassium Ferricyanide and Ammonium Ferric Citrate

07/07/17

Approved, ordered 2017-07-21

John Willis

The Cyanotype Skillshare was very well receivers and I would like to buy a small quantity of the two chemicals; Potassium Ferricyanide, and Ammonium Ferric Citrate (green ), for members to be able to carry out the process in Hackspace. The chemicals are not toxic and the process is safe if carried out with reasonable precautions.

Potassium ferricyanide has low toxicity, its main hazard being that it is a mild irritant to the eyes and skin. However, under very strongly acidic conditions, highly toxic hydrogen cyanide gas is evolved, according to the equation: 6 H+ + [Fe(CN)6]3− → 6 HCN + Fe3+[10] The reaction with hydrochloric acid is as follows: 6 HCl + K3[Fe(CN)6] → 6 HCN + FeCl3 + 3 KCl

Is food additive E381

Information about the Cyanotype Process

Potassium Ferricyanide Safety Sheet

Ammonium Ferric Citrate Safety Sheet

£30

Supplier Wetplate Supplies www.wetplatesupplies.com

100g Potassium Ferricyanide £ 5.49 250g Ammonium Ferric Citrate £19.99 Delivery £ 4.50

• full funded by Hackspace

None

Micro proposal

1. Tom G
2. Jonathan Taphouse

1. Nick G
2. Ian A-S

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