diff --git a/electronics/disposal.md b/electronics/disposal.md
index 0cbd332..ac477a6 100644
--- a/electronics/disposal.md
+++ b/electronics/disposal.md
@@ -62,4 +62,6 @@ These instructions were found on [[https://wiki.london.hackspace.org.uk/w/index.
 > 
 > The weight of Na0H required to deactivate the spent FeCl3 solution is obtained thus:
 > 
-> 1.85 * 3 = 5.55 moles of NaOH, at 40 g/mole that will be 5.55 * 40 = 222 grams NaOH.
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+> 1.85 * 3 = 5.55 moles of NaOH, at 40 g/mole that will be 5.55 * 40 = 222 grams NaOH.
+
+An alternative is to mix the ferric chloride with baking soda. Note that this reaction does produce some heat.
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