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1. PA-N-Acetylgalactosamine
2. PA-N-Acetylglucosamine
3. PA-Fucose
4. PA-Galactose
5. PA-Glucose
6. PA-Mannose
7. PA-Rhamnose
8. PA-Ribose
9. PA-Sugar chain
10. PA-Xylose
11. Palatinit
12. Palatinose,lsomaltulose
13. Palmitic acid
14. Panose
15. Pantothenic acid
16. Papain
17. Paraquat
18. Pb²⁺, Lead
19. PBT, Poly(butylene terephthalate)
20. PCBs, Polychlorinated biphenyls
21. Pectenotoxin
22. Pectin
23. PEEK, Poly(ether ether ketone)
24. PEG, Poly(ethylene glycol)
25. PEG-Chymotrypsin
26. Pencycuron
27. Pentaerythritol
28. Pentamethylene glycol, 1,5-Pentanediol
29. 1,5-Pentanediol, Pentamethylene glycol
30. 1-Pentanol, n-Pentyl alcohol
31. Pentobarbital
32. n-Pentyl alcohol, 1-Pentanol
33. PEO, Poly(ethylene oxide)
34. Perchlorate, ClO₄^-
35. Peroxidase
36. Perylene
37. PET, Poly(ethylene terephthalate)
38. Phe-Gly
39. Phenacetin
40. Phenobarbital
41. Phenol
42. Phenol resin
43. Phenol formaldehyde novolac resin
44. Phenol formaldehyde resin
45. 2-Phenoxypropionic acid
46. Phenoxy resin
47. Phenylalanine, Phe
48. 2-Phenylbutyric acid
49. Phenylenediamine
50. Phenylpropionic acid
51. Phe-Phe-Phe
52. Pimeric acid
53. Phosphate dibasic, HPO₄^2-
54. Phosphate monobasic, H₂PO₄^-
55. L-α-Phosphatidylethanolamine
56. Phosphite monobasic, H₂PO₃^-
57. Phosphoric acid, H₃PO₄
58. Phthalic acid
59. Phthalic acid ester
60. Phylloquinone, Vitamin K₁
61. Phytic acid
62. Phytic acid sodium salt
63. Plasma
64. Plasminogen
65. PMMA, Poly(methyl methacrylate)
66. Polyacetal, Poly(oxymethylene)
67. Polyacrylamide
68. Polyamide
69. Poly(allylamine)
70. 1,2-Polybutadiene
71. Poly(butylene terephthalate), PBT
72. Poly(n-butyl methacrylate)
73. Polycaprolactone
74. Polycaprolactam, Nylon6
75. Polycarbonate
76. Polychlorinated biphenyls, PCBs
77. Poly(cresylglycidylether)-co-formaldehyde
78. Poly(diallyl dimethyl ammonium chloride)
79. Poly(-N,N-dimethyl aminomethyl styrene)
80. Poly(dimethylsiloxane)
81. Poly(ether ether ketone), PEEK
82. Polyethylene
83. Poly(ethylene glycol), PEG
84. Poly(ethylene oxide), PEO
85. Poly(ethylene telephthalate), PET
86. Poly(ethylene imine)
87. Polyhexamethylene adipamide, Nylon6/6
88. Polyhexamethylene dodecanediamide, Nylon6/12
89. Polyhexamethylene nonanediamide, Nylon6/9
90. Polyhexamethylene sebacamide, Nylon6/10
91. Polyimide
92. Poly(isobutyl methacrylate)
93. Polylactic acid
94. Polylaurylactam, Nylon12
95. Poly(methyl methacrylate), PMMA
96. Polyoxyethylene lauryl ether, Brij^®-30
97. Polyoxyethylene cetyl ether
98. Polyoxyethylene nonylphenyl ether, Nonylphenol ethoxylate
99. Polyoxyethylene nonylphenyl ether sulfate, Nonylphenol ethoxylate sulfate
100. Polyoxyethylene octylphenyl ether, Octylphenol ethoxylate
101. Polyoxyethylene sorbitan monooleate, Tween80
102. Poly(oxymethylene), Polyacetal
103. Polyphosphate
104. Polysiloxane
105. Poly(sodium acrylate)
106. Poly(sodium methacrylate)
107. Polystyrene, PS
108. Polysulfone resin
109. Polythionic acid
110. Poly(2,4,6-tribromostyrene)
111. Polytrimethyl hexamethylene terephthalamide, Nylon6/T
112. Poly(vinyl acetate)
113. Poly(vinyl alcohol), PVA
114. Poly(vinyl butyral)
115. Poly(vinyl chloride)
116. Poly(vinyl formal)
117. Poly(vinylidene fluoride), PVDF
118. Poly(4-vinylpyridine)
119. Poly(2-vinylpyridine-co-styrene)
120. Poly(vinylpyrrolidone), PVP
121. Polyundecanoamide, Nylon11
122. Polyurethane
123. Potassium, K⁺
124. Potato starch
125. Pr, Praseodymium
126. Praseodymium, Pr
127. Prednisolone
128. Premecarb
129. Primicarb
130. Procainamide
131. Procaine
132. Procyclidine
133. Proline
134. Promethazine
135. Pronase E
136. 1,3-Propanediol, Trimethylene glycol
137. Propanol, n-Propyl alcohol
138. Propionamide
139. Propionic acid
140. Propoxur
141. Propranolol
142. n-Propyl alcohol, Propanol
143. Propylamine
144. n-Propylbenzene
145. Propyl p-hydroxybenzoate, Propyl paraben
146. Propyl paraben, Propyl p-hydroxybenzoate
147. n-Propylprocainamide
148. PS, Polystyrene
149. Psicose
150. Pullulan
151. Purified Water
152. Putrescine
153. PVA, Poly(vinyl alcohol)
154. PVDF, Poly(vinylidene fluoride)
155. PVP, Poly(vinylpyrrolidone)
156. Pyridine
157. Pyridoxal hydrochloride
158. Pyridoxamine dihydrochloride
159. Pyridoxine hydrochloride, Vitamin B₆
160. Pyrocatechol
161. Pyrogallol
162. Pyroglutamic acid
163. Pyrophosphate
164. Pyruvic acid