How is 4-Amino-1-methyl-1H-pyrazole-5-carboxylic acid hydrochloride (CAS: 92534-70-8) typically synthesized?

4-Amino-1-methyl-1H-pyrazole-5-carboxylic acid hydrochloride is typically synthesized by the reaction of 4-amino-1-methyl-1H-pyrazole-5-carboxylic acid with hydrochloric acid. The process involves dissolving the acid in a solvent like water or an alcohol and adding hydrochloric acid under mild conditions. The product is then isolated and purified by recrystallization or chromatography. The yield is generally high, and the reaction is fairly selective.