| Product Name | CAS No |
| Paraxanthine | 611-59-6 |
| a,a’-Paraxylyl bismethanethiosulfonate | 3948-46-7 |
| Parecoxib | 198470-84-7 |
| Parecoxib sodium | 198470-85-8 |
| Paricalcitol | 131918-61-1 |
| Paroxol | 105812-81-5 |
| Paroxol methanesulfonate | 608521-21-7 |
| Paroxol tosylate | 317323-77-6 |
| Patchouli alcohol | 5986-55-0 |
| (S)-Patulin methyl ether | 123251-09-2 |
| Paullone | 142273-18-5 |
| Pazopanib | 444731-52-6 |
| Pazufloxacin mesylate | 163680-77-1 |
| PCI-24781 | 783355-60-2 |
| PD-0235901 | 391210-10-9 |
| PD 149163 | 169528-11-4 |
| PD 161570 | 192705-80-9 |
| PD 166285 | 212391-63-4 |
| PD 166866 | 192705-79-6 |
| PD 173952 | 305820-75-1 |
| PD 184161 | 212631-67-9 |
| PD 184352 | 212631-79-3 |
| A2-PE | 863180-05-6 |
| Peimisine | 19773-24-1 |
| Pemetrexed disodium | 150399-23-8 |
| Pemetrexed methyl ester | 155405-81-5 |
| Pemirolast potassium salt | 100299-08-9 |
| Pemoline | 2152-34-3 |
| (S)-Penbutolol hydrochloride | 28291-30-7 |
| (R)-Penbutolol hydrochloride | 57130-27-5 |
| Penciclovir | 39809-25-1 |
| Pendimethalin | 40487-42-1 |
| L-Penicillamine | 1113-41-3 |
| D-Penicillamine | 52-67-5 |
| Penicillin V potassium salt | 132-98-9 |
| Penicilloic V acid | 1049-84-9 |
| Penta-O-acetyl iopamidol | 289890-55-7 |
| 1,2,3,7,8-Pentachlorodibenzo-p-dioxin | 40321-76-4 |
| Pentachlorophenol | 87-86-5 |
| (2E)-2,4-Pentadienoic acid | 21651-12-7 |
| Pentaerythritol dibromide | 3296-90-0 |
| Pentaerythritol phosphate alcohol | 5301-78-0 |
| Pentaerythritol tetrahexanoate | 7445-47-8 |
| Pentaethylene glycol dimethanesulfonate | 109789-39-1 |
| 4,4,5,5,5-Pentafluoropentanol | 148043-73-6 |
| Pentafluorophenyl isocyanate | 1591-95-3 |
| N4,N-a,N-a,Nε,Nε-[Pentakis(carboxymethyl)]-N4-(carboxymethyl)-2,6-diamino-4-azahexanoic hydrazide | 412334-17-9 |
| 3',4',5',5,7-Pentamethoxyflavone | 53350-26-8 |
| 1,2,2,6,6-Pentamethyl-4-piperidone | 5554-54-1 |
| 6-[(3,5,5,8,8-Pentamethyl-5,6,7,8-tetrahydronaphthalen-2-yl)cyclopropyl] nicotinic acid methyl ester | 153559-50-3 |