Synonyms: 1-Methyl-5-tetrazolethione; 5-Mercapto-1-Methyl-1,2,3,4-Tetrazole; MMTZ; 1-Methyl-5-Mercapto-1,2,3,4-Tetrazpole; 1,2-dihydro-1-methyl-5h-tetrazole-5-thion; 1-methyl-1h-tetrazole-5-thio; 1-methyl-1h-tetrazole-5-thiol; 1-n-methyl-5-thiotetrazole; 5-Mercapto-1-methyltetrazole1-methylte-trazole-5-thiol; n-methyltetrazolethiol; 5-MMT; 1-METHYL-5-MERCAPTO-1,2,3,4-TETRAZOLE; 1-METHYL-5-MERCAPTO-1H-TETRAZOLE; 1-METHYL-5-MERCAPTOTETRAZOLE; 1-METHYLTETRAZOLE-5-THIOL; 1-METHYLTETRAZOLYL-5-THIOL