Gerald C Koch
Allowing Ads
My post #24 now no longer makes sense due to the deletions of posts.
Regrets.
PE
Bromohydroquinone which has similar properties is available from S-A in 97% purity. Back when CHQ was in use bromohydroquinone was also popular.
And that one at S-A is only 85% pure, showing how typical the problem is.
PE
Jerry, I've gone back to the '40s and find just two references to Cl-HQ. It is advertised as a paper developer for red to brown tones.
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