Aristolochic acid I

Articaine hydrochloride

Articaine impurity A - methyl3-[[2-(propylamino)acetyl]amino]-4-methylthiophene-2-carboxylate

Articaine impurity E - methyl 4-methyl-3-[[(2RS)-2-[(1-methylethyl)amino]propanoyl] amino]thiophene-2-carboxylate

Ascorbic acid (Vitamin C )

Ascorbic acid impurity C - D-xylo-hex-2-ulosonic acid (D-sorbosonic acid)

Ascorbic acid impurity D - methyl D-xylo-hex-2-ulosonate (methyl D-sorbosonate)

Ascorbyl palmitate

Asiaticoside

Asparagine monohydrate