1B-LSD Blotters for sale 1B-LSD Blotters - 125mcg are a popular research chemical belonging to the lysergamide family. The chemical name for 1B-LSD is 1-butanoyl-lysergic acid diethylamide, and its CAS number is 2349358-81-0. In its blotter form, 1B-LSD appears as small squares of paper, each containing 125mcg of the active compound. This compound is highly sought after by researchers studying the effects of lysergamides on the brain and behavior due to its potent and unique properties.