DESCRIPTION OF THE DATASET: Supplementary Datasets for the paper published in Astrobiology, Venus 2 Special Collection: Supplementary Dataset S1: The original 1D 1H and 13C NMR data collected in 81% w/w and 98% w/w concentrated sulfuric acid at all three time intervals for all 20 amino acids. Supplementary Dataset S1 also contains original 1D 1H and 13C NMR data for modified amino acids such as S-sulfocysteine, O-sulfoserine, oxidized cysteine, oxidized methionine as well as original 1D 1H and 13C NMR data for tests with formic acid and FeO. Supplementary Dataset S2: The original 2D 1H-13C HMQC NMR data for all 20 amino acids collected in 98% w/w concentrated sulfuric acid.