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Substance CAS Number(s) Health Factors
Paecilomyces species   X
Palladium 7440-05-3  
Pancreatin 8049-47-6  
Papain 9001-73-4  
Paraffin Wax Fume 8002-74-2 X
Paraquat, respirable dust 4685-14-7; 2074-50-2 (Paraquat dimethyl sulfate); 1910-42-5 (Paraquat dichloride) X
Parathion 56-38-2 X
Particle Size Determination    
Particulates not otherwise regulated (Respirable Fraction)   X
Particulates not otherwise regulated (Total Dust)   X
Pendimethalin 40487-42-1  
Penicillium species   X
Pentaborane 19624-22-7 X
Pentac 2227-17-0  
Pentachloroanisole 1825-21-4 X
Pentachlorobenzene 608-93-5  
Pentachlorodibenzodioxins (All Isomers)    
Pentachlorodibenzofurans (All Isomers)    
Pentachloroethane 76-01-7 X
Pentachloronaphthalene 1321-64-8 X
Pentachloronitrobenzene 82-68-8 X
Pentachlorophenol 87-86-5 X
1,3-Pentadiene 504-60-9  
Pentaerythritol (Respirable Fraction) 115-77-5 X
Pentaerythritol (Total Dust) 115-77-5 X
Pentaerythritol Tetranitrate 78-11-5 X
Pentaerythritol Triacrylate 3524-68-3  
Pentaethylene glycol 4792-15-8 X
Pentamethyldiethylenetriamine 3030-47-5  
Pentamine Isethionate 140-64-7  
Pentane 109-66-0 X
2,3-Pentanedione 600-14-6 X
2-Pentanone 107-87-9 X
1-Pentene 109-67-1  
t-2-Pentenoic Acid 13991-37-2  
Perchloric Acid 7601-90-3  
Perchloromethyl Mercaptan 594-42-3 X
Perchloryl Fluoride 7616-94-6 X
Perfluorobutyl methyl ether (Mixed Isomers) 163702-07-6 (methyl nonafluorobutyl ether); 163702-08-7 (methyl nonafluoroisobutyl ether) X
Perfluoroisobutylene 382-21-8  
Perfluorooctanoic acid 335-67-1 X
Perlite (Respirable Fraction) 93763-70-3 X
Perlite (Total Dust) 93763-70-3 X
Permethrin 52645-53-1  
Perylene 198-55-0 X
Petroleum Distillates (Naphtha) (Rubber Solvent) 8002-05-9 (Petroleum distillates (naphtha)) X
Peziza species   X
pH Determination    
alpha-Phellandrene 99-83-2  
Phenanthrene 85-01-8 X
Phenethyl Alcohol 60-12-8  
Phenmedipham 13684-63-4  
Phenol 108-95-2 X
Phenothiazine 92-84-2 X
2-Phenoxyethanol 122-99-6  
2-Phenoxyethyl acrylate 48145-04-6  
Phenyl Acetic Acid 103-82-2  
1-Phenyl-1-Cyclohexene 31017-40-0  
4-Phenylcyclohexene 4994-16-5  
m-Phenylenediamine 108-45-2 X
o-Phenylenediamine 95-54-5  
p-Phenylene Diamine 106-50-3 X
Phenyl Ether (Vapor) 101-84-8 X
Phenyl Ether-Biphenyl Mix (Vapor) 8004-13-5 X
Phenyl Glycidyl Ether 122-60-1 X
Phenylhydrazine 100-63-0 X
Phenyl Isocyanate 103-71-9  
Phenyl Isopropanol 617-94-7  
Phenyl mercaptan 108-98-5 X
1-Phenylnaphthalene 605-02-7  
2-Phenylnaphthalene 612-94-2  
N-Phenyl-1-Naphthylamine 90-30-2  
N-Phenyl-2-Naphthylamine 135-88-6 X
o-Phenyl Phenol 90-43-7  
Phenylphosphine 638-21-1 X
Phenyl-2-Propanone 103-79-7  
1-Phenyl-3-pyrazolidinone 92-43-3  
3-Phenyltoluene 643-93-6 X
Phoma species   X
Phorate 298-02-2 X
Phosdrin 7786-34-7 X
Phosgene 75-44-5 X
Phosmet 732-11-6  
Phosphine 7803-51-2 X
Phosphoric Acid 7664-38-2 X
Phosphorus (yellow) 7723-14-0 X
Phosphorus Oxychloride 10025-87-3  
Phosphorus Pentachloride 10026-13-8 X
Phosphorus Pentasulfide 1314-80-3 X
Phosphorus Pentoxide 1314-56-3  
Phosphorus Trichloride 7719-12-2 X
Phosvel 21609-90-5 X
Phthalic Acid 88-99-3  
Phthalic Anhydride 85-44-9 X
m-Phthalodinitrile 626-17-5 X
Picloram (Respirable Fraction) 1918-02-1 X
Picloram (Total Dust) 1918-02-1 X
Picramic Acid 96-91-3  
Picric Acid 88-89-1 X
Pindone (2-Pivalyl-1,3-indandione) 83-26-1 X
alpha-Pinene 80-56-8  
beta-Pinene 127-91-3  
Piperazine 110-85-0 X
Piperazine Dihydrochloride 142-64-3  
Piperidine 110-89-4 X
Piperonyl Butoxide 51-03-6 X
Pipron 3478-94-2 X
Pirimicarb 23103-98-2  
Pirimiphos Methyl 29232-93-7 X
Pithomyces species   X
Plaster of Paris (Respirable Fraction) 26499-65-0 X
Plaster of Paris (Total Dust) 26499-65-0 X
Platinum (as Pt), metal 7440-06-4  
Platinum (as Pt), soluble salts 7440-06-4 X
Polyfunctional Aziridine 64265-57-2  
Polymeric MDI (PAPI) 9016-87-9 X
Polytetrafluoroethylene Decomposition Products 9002-84-0 X
Portland Cement (Respirable Fraction) 65997-15-1 X
Portland Cement (Total Dust) 65997-15-1 X
Potable Water    
Potassium p-tert-amylphenate 53404-18-5  
Potassium Hydroxide 1310-58-3 X
Pramitol 1610-18-0  
Progesterone 57-83-0 X
Propane 74-98-6 X
Propargyl Alcohol 107-19-7 X
beta-Propiolactone 57-57-8 X
Propionaldehyde 123-38-6 X
Propionic acid 79-09-4 X
Propionitrile 107-12-0  
Propoxur 114-26-1 X
2-Propoxyethanol 2807-30-9 X
n-Propoxypropanol (mixed isomers) 30136-13-1 X
n-Propyl Acetate 109-60-4 X
n-Propyl Alcohol 71-23-8 X
Propylamine 107-10-8  
n-Propyl Benzene 103-65-1  
Propylene 115-07-1 X
Propylene Carbonate 108-32-7  
Propylenediamine 78-90-0  
Propylene Dichloride 78-87-5 X
Propylene glycol 57-55-6 X
1,2-Propylene Glycol Dinitrate 6423-43-4  
Propylene Imine 75-55-8 X
Propylene Oxide 75-56-9 X
n-Propyl Nitrate 627-13-4 X
Propyl Paraben 94-13-3  
Protease 9001-92-7  
Pyrene 129-00-0 X
Pyrethrum 8003-34-7 X
Pyridine 110-86-1 X
1-(2-Pyridyl)piperazine 34803-66-2  
Pyrimethamine 58-14-0