Aminomethylsulfonic acid (also called aminomethylenesulfonic acid and aminomethanesulfonic acid) is an organic chemical compound, with amino () and sulfonic acid () groups on the carbon atom. Its chemical formula is , and it has a molar mass of 111.12 g/mol.
Aminomethane sulfonic acid can be made by the reaction between hexamethylenetetramine (hexamine) with sulfur dioxide (SO<sub>2</sub>) in an aqueous environment.
Aminomethanesulfonic acid is a corrosive solid. It could be thought of as the sulfonic acid analogue of glycine, just like aminomethylphosphonic acid is the phosphonic analogue of glycine. Its density is ~1.7 g/cm<sup>3</sup>.
Aminomethanesulfonic acid appears as a white crystalline solid that dissolves readily in water. It exhibits amphoteric behavior, meaning it can act as either an acid or a base depending on the conditions. Heating the compound above 280 ðC leads to decomposition, releasing sulfur dioxide and other gaseous products.
Although aminomethanesulfonic acid has limited commercial use, it has been employed in research as a reagent and as a buffering agent. It has also been studied as a structural analog of taurine in biochemical research, helping to investigate metabolic pathways and sulfonic acid derivatives.
Aminomethanesulfonic acid can cause skin and eye burns, it is an dermatotoxin.