I have this 1% 8oz. Methylene blue as a quick replacement Cordon Methylene Blue 4oz (temporarily out of stock). There are no instructions for use on the bottle. Since Cordon 4oz. Bottle at 2.303%, this 8oz 1% is roughly equivalent - I just need to double the dosage of Cordon and it should be right. In terms of price, cordon methylene blue is significantly better. The seller's service and delivery time are good. Many Thanks.
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