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

Chemical	CAS No.	Recommendation for skin protection†	Recommended protective clothing barriers*
Naphtha (coal tar)	8030-30-6	Prevent skin contact	8 hr: Viton 4 hr: Nitrile, PVA
Naphthalene	91-20-3	Prevent skin contact	8 hr: Teflon
Naphthalene diisocyanate	3173-72-6	Prevent skin contact	Contact the manufacturer for recommendations
alpha-Naphthylamine	134-32-7	Prevent skin contact	Contact the manufacturer for recommendations
ß-Naphthylamine	91-59-8	Prevent skin contact	Contact the manufacturer for recommendations
Niax® Catalyst ESN	62765-93-9	Prevent skin contact	Contact the manufacturer for recommendations
Nickel carbonyl	13463-39-3	Prevent skin contact	8 hr: Tychem
Nickel metal and other compounds (as Ni)	7440-02-0 (Metal)	Prevent skin contact	Contact the manufacturer for recommendations for specific compounds
Nicotine	54-11-5	Prevent skin contact	8 hr: Barricade, CPF3, Responder 4 hr: Teflon, PE/EVAL
Nitric acid	7697-37-2	Prevent skin contact	(<70% only) 8 hr: Butyl, Viton, Saranex, Barricade, CPF3, Trellchem, Tychem 4 hr: Neoprene, PE, PE/EVAL, Responder
Nitric oxide	10102-43-9	N.R.	Determine based on working conditions
p-Nitroaniline	100-01-6	Prevent skin contact	Contact the manufacturer for recommendations
Nitrobenzene	98-95-3	Prevent skin contact	8 hr: Butyl, PVA, Teflon, Viton, PE/EVAL, Barricade, CPF3, Responder, Trellchem, Tychem
4-Nitrobiphenyl	92-93-3	Prevent skin contact	Contact the manufacturer for recommendations
p-Nitrochlorobenzene	100-00-5	Prevent skin contact	4 hr: Saranex
Nitroethane	79-24-3	Prevent skin contact	8 hr: Butyl, PE/EVAL, Barricade 4 hr: Teflon
Nitrogen dioxide	10102-44-0	Prevent skin contact	8 hr: Saranex
Nitrogen trifluoride	7783-54-2	N.R.	Determine based on working conditions
Nitroglycerine	55-63-0	Prevent skin contact	4 hr: PE/EVAL
Nitromethane	75-52-5	Prevent skin contact	8 hr: Butyl, Teflon, PE/EVAL, Barricade, Responder, Trellchem 4 hr: PVA
2-Nitronaphthalene	581-89-5	Prevent skin contact	Contact the manufacturer for recommendations
1-Nitropropane	108-03-2	Prevent skin contact	8 hr: Butyl, PVA
2-Nitropropane	79-46-9	Prevent skin contact	8 hr: Butyl, PVA, Tychem 4 hr: Teflon, PE/EVAL
N-Nitrosodimethylamine	62-75-9	Prevent skin contact	Contact the manufacturer for recommendations
o-Nitrotoluene	88-72-2	Prevent skin contact	8 hr: Butyl 4 hr: Teflon, Saranex
m-Nitrotoluene	99-08-1	Prevent skin contact	Contact the manufacturer for recommendations
p-Nitrotoluene	99-99-0	Prevent skin contact	Contact the manufacturer for recommendations
Nitrous oxide	10024-97-2	Frostbite	Prevent possible skin freezing from direct liquid contact
Nonane	111-84-2	N.R.	Determine based on working conditions
1-Nonanethiol	1455-21-6	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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