# Ferrous chloride solution coming out purple rather than green?

I've got some steel wool in hydrochloric acid to attempt to make ferrous chloride and the whole solution has turned purple. From everything I've seen it's supposed to be green. I have no idea what's happened and if anyone could give any ideas that'd be great.

• The steel wool has no soap
• The glassware is clean of phenols/enols/anything that would give a positive result in the ferric chloride test
• The HCl has 1% titanium dioxide for some reason (store bought in Australia)

https://imgur.com/a/q4TAhtO

• Chromium has a rich color chemistry. Steel wool is not iron wool. Aug 10 '21 at 16:37
• HCl with titanium dioxide? This is strange. Aug 10 '21 at 16:40

Let us assume your store HCl has dissolved titanium dioxide for whatever magical reasons (no idea why this is so). Titanium could be in $$\ce{Ti^{4+}}$$. When you add iron/steel wool, $$\ce{Ti^{4+}}$$ begins to be reduced by hydrogen evolution reaction to $$\ce{Ti^{3+}}$$. Fifty years ago, we could have called that nascent hydrogen is doing this magic, but iron powder in HCl can reduce the +4 oxidation state of Ti to +3 by some mechanism.
$$\ce{Ti^{3+}}$$ chloride solutions are beautiful violet/purplish (source: Wikipedia):