CAS 1820-80-0 appears in our catalog under these names: 1H-Pyrazol-5-amine, 97%, 1H-Pyrazol-3-amine, 97%, 3-Aminopyrazole, 3–Aminopyrazole, 3-Amino-1H-pyrazole, 98% . Offered by: Combi-blocks, TRC, GLPBio, Thermo Scientific (Alfa Aesar), Biosynth. Available pack sizes: 5g, 100g, 500g, 25g, 1kg, 10g, 1g, 2,5g.