水合钼酸铵 (para), Ammonium molybdate (para) hydrate

磷钼酸铵水合物, Ammonium phosphomolybdate hydrate

碲酸铵, Ammonium tellurate

四硫代钼酸铵, Ammonium tetrathiomolybdate

钨酸铵, Ammonium tungsten oxide

2-苯胺基-4,6-双(呀啉代)-1,3,5-三嗪, 2-Anilino-4,6-di(4-morpholinyl)-1,3,5-triazine

1,4-蒽醌, 1,4-Anthraquinone

醋酸锑(III), Antimony(III) acetate

氧化锑(III), Antimony(III) oxide

磷灰石, Apatite

L-精氨酸, L-Arginine

硫化砷(II), Arsenic(II) sulfide

L-(+)-抗坏血酸, L-(+)-Ascorbic acid

D-(-)-天冬酰胺 单水合物, D-(-)-Asparagine monohydrate

L-天冬氨酸钠一水合物, L-Aspartic acid monosodium salt monohydrate