Recommendations for Chemical Protective Clothing A Companion to the NIOSH Pocket Guide to Chemical Hazards TABLE S

Chemical	CAS No.	Recommendation for skin protection†	Recommended protective clothing barriers*
Selenium	7782-49-2	Prevent skin contact	Contact the manufacturer for recommendations
Selenium hexafluoride	7783-79-1	N.R.	Determine based on working conditions
Silica, amorphous	7631-86-9	N.R.	Determine based on working conditions
Silica, crystalline (as respirable dust)	14808-60-7	N.R.	Determine based on working conditions
Silicon	7440-21-3	N.R.	Determine based on working conditions
Silicon carbide	409-21-2	N.R.	Determine based on working conditions
Silicon tetrahydride	7803-62-5	N.R.	Determine based on working conditions
Silver (metal dust and soluble compounds, as Ag)	7440-22-4 (metal)	Prevent skin contact	Contact the manufacturer for recommendations for specific compound
Soapstone (containing less than 1% quartz)		N.R.	Determine based on working conditions
Sodium aluminum fluoride (as F)	15096-52-3	Prevent skin contact	Contact the manufacturer for recommendations
Sodium azide	26628-22-8	Prevent skin contact	Contact the manufacturer for recommendations
Sodium bisulfite	7631-90-5	N.R.	Determine based on working conditions
Sodium cyanide (as CN)	143-33-9	Prevent skin contact	(solution >70% only) 8 hr: Saranex, Barricade
Sodium fluoride (as F)	7681-49-4	Prevent skin contact	8 hr: Natural, Neoprene, Nitrile, PVC, Saranex
Sodium fluoroacetate	62-74-8	Prevent skin contact	Contact the manufacturer for recommendations
Sodium hydroxide	1310-73-2	Prevent skin contact	(solution >70% only) 8 hr: Neoprene, PVC, Barricade
Sodium metabisulfite	7681-57-4	N.R.	Determine based on working conditions
Starch	9005-25-8	Prevent skin contact	Any barrier that will prevent skin contact
Stibine	7803-52-3	N.R.	Determine based on working conditions
Stoddard solvent	8052-41-3	Prevent skin contact	8 hr: Nitrile, Viton, Saranex, PE/EVAL, Barricade, Responder 4 hr: PVA
Strychnine	57-24-9	Prevent skin contact	Contact the manufacturer for recommendations
Styrene	100-42-5	Prevent skin contact	8 hr: Viton, PE/EVAL, Barricade, CPF3, Trellchem 4 hr: PVA, Teflon, Responder
Subtilisins	1395-21-7 (BPN) 9014-01-1 (Carlsburg)	Prevent skin contact	Contact the manufacturer for recommendations
Succinonitrile	110-61-2	Prevent skin contact	Contact the manufacturer for recommendations
Sucrose	57-50-1	N.R.	Determine based on working conditions
Sulfur dioxide	7446-09-5	Prevent skin contact/ Frostbite	8 hr: Saranex, Barricade, Responder 4 hr: Teflon Prevent possible skin freezing from direct liquid contact
Sulfur hexafluoride	2551-62-4	Frostbite	Prevent possible skin freezing from direct liquid contact
Sulfuric acid	7664-93-9	Prevent skin contact	(solution >70% only) 8 hr: Butyl, PE, Teflon, Saranex, PE/EVAL, Barricade, CPF3, Responder, Trellchem, Tychem 4 hr: Viton
Sulfur monochloride	10025-67-9	Prevent skin contact	Contact the manufacturer for recommendations
Sulfur pentafluoride	5714-22-7	Prevent skin contact	Contact the manufacturer for recommendations
Sulfur tetrafluoride	7783-60-0	Frostbite	Prevent possible skin freezing from direct liquid contact
Sulfuryl fluoride	2699-79-8	Frostbite	Prevent possible skin freezing from direct liquid contact
Sulprofos	35400-43-2	Prevent skin contact	Contact the manufacturer for recommendations

Recommendations for skin protection^†

Prevent skin contact....	Wear appropriate personal protective clothing to prevent skin contact. Suggested barriers for use should be confirmed with the vendor and for additional information and use limitations.
Frostbite....................	Wear appropriate personal protective clothing to prevent the skin from becoming frozen from contact with the evaporating liquid or from contact with vessels containing the liquid.
N.R...........................	No specific recommendation can be made. Actual working conditions will determine the need and type of personal protective equipment.

†Bold type indicates a change from or an addition to what is published in the NIOSH Pocket Guide to Chemical Hazards, June 1997 Edition.

Recommended protective clothing barriers^*

Butyl = Butyl Rubber (Gloves, Suits, Boots) Natural = Natural Rubber (Gloves) Neoprene = Neoprene Rubber (Gloves, Suits, Boots) Nitrile = Nitrile Rubber (Gloves, Suits, Boots) PE = Polyethylene (Gloves, Suits, Boots) PVA = Polyvinyl Alcohol (Gloves) PVC = Polyvinyl Chloride (Gloves, Suits, Boots) Teflon = Teflon™ (Gloves, Suits, Boots)

Viton = Viton™ (Gloves, Suits) Saranex = Saranex™ coated suits PE/EVAL = 4H™ and Silver Shield™ brand gloves Barricade = Barricade™ coated suits CPF3 = CPF3™ suits Responder = Responder™ suits Trellchem = Trellchem HPS™ suits Tychem = Tychem 10000™ suits

8 hr = More than 8 hours of resistance to breakthrough >0.1 µg/cm²/min.

4 hr = At least 4 but less than 8 hours of resistance to breakthrough >0.1 µg/cm²/min.

*Neoprene is a tradename and Teflon™, Barricade™ and Tychem 10000™ are trademarks of the DuPont Company. Viton™ is a registered trademark of DuPont Dow Elastomers. Saranex is a tradename of the Dow Chemical Company. 4H is a trademark of the Safety 4 Company. Silver Shield is a trademark of the Siebe North Company. CPF3 and Responder are trademarks of the Kappler Company. Trellchem HPS is a trademark of the Trelleborg Company. Recommendations are NOT valid for very thin Natural Rubber, Neoprene, Nitrile, and PVC gloves (0.3 mm or less).

This page was last updated April 12, 1999

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