.alpha.-Mercaptoacetic acid 2-Mercaptoacetic acid 2-Thioglycolic acid 68-11-1 Acetic acid, mercapto- Acide thioglycolique Glycolic acid, 2-thio- Glycolic acid, thio- Mercaptoacetic acid NSC1894 Thioglycolic acid Thiovanic acid Usaf cb-35 WLN: SH1VQ