Panobinostat-d4 (indole-d4)

Paraformaldehyde-d₂

Parathion-d₁₀ (diethyl-d₁₀)

Pefloxacin-d₃ (N-methyl-d₃)

(±)-Penconazole-d₇ (pentyl-3,3,4,4,5,5,5-d₇)

Pendimethalin-d₅ [N-(1-ethyl-1′,1′-d₂-propyl-1,2,2-d₃)]

Penicillin G-d₅ Potassium Salt (phenyl-d₅)

Penicillin V-d₅ Potassium Salt (phenyl-d₅)

Pentachloroanisole-d₃ (methoxy-d₃)

2,2′,4,5,5′-Pentachlorobiphenyl-3′,4′,6′-d₃

2,2′,4,6,6′-Pentachlorobiphenyl-3′,4′,5′-d₃

2,3,4,4′,5-Pentachlorobiphenyl-2′,3′,5′,6′-d₄

2,3,4,5,6-Pentachlorobiphenyl-2′,3′,4′,5′,6′-d₅

Pentachlorophenol-¹³C₆

n-Pentacosane-d₅₂

n-Pentadecane-d₃₂

Pentadecanoic-2,2-d₂ Acid

Pentadecanoic-15,15,15-d₃ Acid

Pentadecanoic-d₂₉ Acid