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Substance CAS Number(s) Health Factors
Saccharin 81-07-2 X
Safrotin 31218-83-4  
Saphrophyte   X
Sarin 107-44-8 X
Scopulariopsis species   X
Scopolamine methyl nitrate 6106-46-3 X
Selenium Compounds (as Se) 7782-49-2; 7446-34-6 (Selenium sulfide) X
Selenium Hexafluoride (as Se) 7783-79-1 X
Sevoflurane 28523-86-6 X
Silica, Amorphous, Diatomaceous Earth (<1% Crystalline Silica) 61790-53-2 X
Silica, Amorphous, Precipitated and Gel 7631-86-9 (Silica, Amorphous); 7699-41-4 (Silica, Gel); 60676-86-0 (Vitreous silica); 61790-53-2 (Diatomaceous earth (uncalcined)); 68855-54-9 (Flux-calcined diatomaceous earth); 112926-00-8 (Precipitated silica; silica gel); 112945-52-5 (Pyrogenic (fumed) amorphous silica) X
Silica, Crystalline Cristobalite, Respirable Dust 14464-46-1 X
Silica, crystalline quartz (Respirable Fraction) 14808-60-7 X
Silica, Crystalline Tridymite, Respirable Dust 15468-32-3 X
Silica, Crystalline Tripoli (as Quartz), Respirable Dust 1317-95-9 X
Silica, Fused (Respirable Dust) 60676-86-0 X
Silica (Quartz, Total) 14808-60-7 X
Silicon (Respirable Fraction) 7440-21-3 X
Silicon (Total Dust) 7440-21-3 X
Silicon Carbide (Respirable Fraction) 409-21-2 X
Silicon Carbide (Total Dust) 409-21-2 X
Silicon Tetrafluoride 7783-61-1  
Silicon Tetrahydride 7803-62-5 X
Silver, Metal & Soluble Compounds (as Ag) 7440-22-4 (metal) X
Silvex 93-72-1 X
Simazine 122-34-9  
Soapstone (Respirable Fraction)   X
Soapstone (Total Dust)   X
Sodium Azide 26628-22-8 X
Sodium Bisulfite 7631-90-5  
Sodium Bromate 7789-38-0  
Sodium Carbonate 497-19-8  
Sodium Chloride 7647-14-5  
Sodium Fluoroacetate 62-74-8 X
Sodium Gluconate 527-07-1  
Sodium Hydrosulfite 7775-14-6  
Sodium Hydroxide 1310-73-2 X
Sodium Lauryl Sulfate 151-21-3  
Sodium Ligninsulfonate 8061-51-6  
Sodium Metabisulfite 7681-57-4  
Sodium Metasilicate 6834-92-0 X
Sodium Nitrate 7631-99-4  
Sodium Nitrite 7632-00-0 X
Sodium p-Nitrophenol 824-78-2  
Sodium Pentachlorophenate 131-52-2  
Sodium Persulfate 7775-27-1  
Sodium o-Phenyl Phenate 132-27-4 X
Sodium Tripolyphosphate 7758-29-4  
Soil    
Solder Fume (Metals)    
Sporobolomyces species   X
Sporothrix species   X
Stachybotrys chartarum   X
Stachybotrys species   X
Starch (Respirable Fraction) 9005-25-8 X
Starch (Total Dust) 9005-25-8 X
Stearic Acid 57-11-4  
Stibine 7803-52-3 X
Stoddard Solvent 8052-41-3 X
Strontium 7440-24-6  
Strychnine 57-24-9 X
Styrene 100-42-5 X
Subtilisins 1395-21-7 (BPN); 9014-01-1 (Carlsburg) X
Sucrose (Respirable Fraction) 57-50-1 X
Sucrose (Total Dust) 57-50-1 X
Sudan I 842-07-9 X
Sudan III 85-86-9 X
Sulfadiazine 68-35-9  
Sulfamethazine 57-68-1 X
Sulfamic Acid 5329-14-6  
Sulfapyridine 144-83-2  
m-Sulfobenzoic Acid 121-53-9  
Sulfometuron Methyl 74222-97-2 X
4,4'-Sulfonyldianiline 80-08-0 X
Sulfur 7704-34-9 X
Sulfur Dioxide 7446-09-5 X
Sulfur Hexafluoride 2551-62-4 X
Sulfuric Acid 7664-93-9 X
Sulfur Monochloride 10025-67-9 X
Sulfur Pentafluoride 5714-22-7 X
Sulfur Tetrafluoride 7783-60-0 X
Sulfuryl Fluoride 2699-79-8 X
Sulprofos 35400-43-2  
Syncephalastrum species   X