The purple colour is caused by stuff added to it to give it a bad taste and also not be mistaken for water. Discourages people from drinking it.
Non Linear Halfords Concentrated Screen Wash
Dec 22, 2017
43 Replies
Actually the stuff that makes it nasty to drink is usually pyridine, which is colourless. The purple dye is something different.
N-(4-(bis(4-(dimethylamino)phenyl)methylene)cyclohexa-2,5-dien-1-ylidene)methanaminium chloride)
Apparently.
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Correct.
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