CAS 107-98-2
1-Methoxy-2-propanol
- OSHA PEL
- 100 ppm
- Method
- NIOSH 2554
Target organs: CNS; eyes; respiratory tract
Occupational Exposure Limits Reference
OSHA PELs & NIOSH RELs for industrial chemicals
A searchable reference of occupational exposure limits — Permissible Exposure Limits (PELs), NIOSH Recommended Exposure Limits (RELs), CAS numbers, target organs, and NIOSH air-sampling methods for common industrial chemicals and airborne hazards.
Showing all 150 chemicals.
Browse by hazard class
Acid Gas
Acid Gases & Irritants
16 chemicals
AldehydeAldehydes
5 chemicals
AromaticAromatic Hydrocarbons
18 chemicals
AsphyxiantAsphyxiants
4 chemicals
HalogenatedHalogenated Hydrocarbons
29 chemicals
Metal FumeMetal Fumes
20 chemicals
ParticulateParticulates & Dusts
7 chemicals
VOCVolatile Organic Compounds
51 chemicals
Chemical directory
OSHA PEL · NIOSH RELVOC
CAS 75-34-3
1,1-Dichloroethane
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1003
Target organs: Liver; kidneys; CNS
CAS 71-55-6
1,1,1-Trichloroethane
- OSHA PEL
- 350 ppm
- Method
- NIOSH 1003
Target organs: CNS; liver; heart
- OSHA PEL
- 1000 ppm
- Method
- NIOSH 1020
Target organs: Heart; CNS
CAS 79-00-5
1,1,2-Trichloroethane
- OSHA PEL
- 10 ppm
- Method
- NIOSH 1003
Target organs: CNS; liver; kidneys
CAS 79-34-5
1,1,2,2-Tetrachloroethane
- OSHA PEL
- 5 ppm
- Method
- NIOSH 1003
Target organs: Liver; kidneys; CNS
CAS 106-93-4
1,2-Dibromoethane
- OSHA PEL
- 20 ppm
- Method
- NIOSH 1008
Target organs: Liver; kidneys; reproductive system
CAS 107-06-2
1,2-Dichloroethane
- OSHA PEL
- 50 ppm
- Method
- NIOSH 1003
Target organs: Liver; kidneys; CNS
CAS 78-87-5
1,2-Dichloropropane
- OSHA PEL
- 75 ppm
- Method
- NIOSH 1013
Target organs: Liver; kidneys; respiratory tract
CAS 76-14-2
1,2-Dichlorotetrafluoroethane
- OSHA PEL
- 1000 ppm
- Method
- NIOSH 1016
Target organs: Heart; CNS
CAS 123-91-1
1,4-Dioxane
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1602
Target organs: Liver; kidneys; CNS
CAS 109-86-4
2-Methoxyethanol
- OSHA PEL
- 25 ppm
- Method
- NIOSH 1403
Target organs: Blood; CNS; kidneys
CAS 79-46-9
2-Nitropropane
- OSHA PEL
- 25 ppm
- Method
- NIOSH 2528
Target organs: Liver; respiratory tract
CAS 75-07-0
Acetaldehyde
- OSHA PEL
- 200 ppm
- Method
- NIOSH 2538
Target organs: Respiratory tract; eyes; skin
CAS 64-19-7
Acetic Acid
- OSHA PEL
- 10 ppm
- Method
- NIOSH 1603
Target organs: Respiratory tract; eyes; skin
- OSHA PEL
- 1000 ppm
- Method
- NIOSH 1300
Target organs: CNS; eyes; respiratory tract
CAS 75-05-8
Acetonitrile
- OSHA PEL
- 40 ppm
- Method
- NIOSH 1606
Target organs: Respiratory tract; skin; CNS
- OSHA PEL
- 0.10 ppm
- Method
- NIOSH 2501
Target organs: Respiratory tract; eyes; skin
CAS 107-13-1
Acrylonitrile
- OSHA PEL
- 2 ppm
- Method
- NIOSH 1604
Target organs: Skin; CNS; respiratory tract
CAS 107-18-6
Allyl Alcohol
- OSHA PEL
- 2 ppm
- Method
- NIOSH 1402
Target organs: Eyes; respiratory tract; skin
CAS 98-83-9
alpha-Methylstyrene
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1501
Target organs: CNS; eyes; respiratory tract
- OSHA PEL
- 50 ppm
- Method
- NIOSH 6016
Target organs: Respiratory tract; eyes; skin
- OSHA PEL
- 5 ppm
- Method
- NIOSH 2017
Target organs: Blood; liver; kidneys
CAS 7440-36-0
Antimony
- OSHA PEL
- 0.50 mg/m³
- Method
- NIOSH 7300
Target organs: Respiratory tract; skin; heart
CAS 7440-38-2
Arsenic (Inorganic)
- OSHA PEL
- 0.010 mg/m³
- Method
- NIOSH 7300
Target organs: Skin; lungs; nervous system
CAS 1332-21-4
Asbestos
- OSHA PEL
- 0.10 mg/m³
- Method
- NIOSH 7400
Target organs: Lungs; pleura (mesothelioma)
CAS 7440-39-3
Barium (Soluble Compounds)
- OSHA PEL
- 0.50 mg/m³
- Method
- NIOSH 7300
Target organs: Respiratory tract; heart
- OSHA PEL
- 1 ppm
- Method
- NIOSH 1501
Target organs: Bone marrow; blood
CAS 100-44-7
Benzyl Chloride
- OSHA PEL
- 1 ppm
- Method
- NIOSH 2017
Target organs: Respiratory tract; eyes; skin
CAS 7440-41-7
Beryllium
- OSHA PEL
- 0.0020 mg/m³
- Method
- NIOSH 7300
Target organs: Lungs; skin
CAS 7726-95-6
Bromine
- OSHA PEL
- 0.10 ppm
- Method
- NIOSH 6011
Target organs: Respiratory tract; eyes; skin
CAS 75-25-2
Bromoform
- OSHA PEL
- 0.50 ppm
- Method
- NIOSH 1003
Target organs: CNS; liver; kidneys
CAS 107-92-6
Butyric Acid
- OSHA PEL
- 10 ppm
- Method
- NIOSH 2011
Target organs: Respiratory tract; eyes; skin
CAS 7440-43-9
Cadmium
- OSHA PEL
- 0.10 mg/m³
- Method
- NIOSH 7048
Target organs: Kidneys; lungs; bones
CAS 1333-86-4
Carbon Black
- OSHA PEL
- 3.5 mg/m³
- Method
- NIOSH 5000
Target organs: Lungs; cardiovascular
CAS 75-15-0
Carbon Disulfide
- OSHA PEL
- 20 ppm
- Method
- NIOSH 1600
Target organs: CNS; cardiovascular; skin
CAS 630-08-0
Carbon Monoxide
- OSHA PEL
- 50 ppm
- Method
- NIOSH 6604
Target organs: Blood; cardiovascular
CAS 56-23-5
Carbon Tetrachloride
- OSHA PEL
- 10 ppm
- Method
- NIOSH 1003
Target organs: Liver; kidneys; CNS
- OSHA PEL
- 1 ppm
- Method
- NIOSH 6011
Target organs: Respiratory tract; eyes
CAS 10049-04-4
Chlorine Dioxide
- OSHA PEL
- 0.10 ppm
- Method
- NIOSH 6011
Target organs: Respiratory tract; eyes
CAS 108-90-7
Chlorobenzene
- OSHA PEL
- 75 ppm
- Method
- NIOSH 1003
Target organs: Liver; kidneys; respiratory tract
CAS 75-45-6
Chlorodifluoromethane
- OSHA PEL
- 1000 ppm
- Method
- NIOSH 1016
Target organs: Heart; CNS; respiratory tract
CAS 67-66-3
Chloroform
- OSHA PEL
- 50 ppm
- Method
- NIOSH 1003
Target organs: Liver; kidneys; CNS
CAS 76-15-3
Chloropentafluoroethane
- OSHA PEL
- 1000 ppm
- Method
- NIOSH 1016
Target organs: Heart; CNS
CAS 18540-29-9
Chromium (VI) Compounds
- OSHA PEL
- 0.0050 mg/m³
- Method
- NIOSH 7605
Target organs: Respiratory tract; skin; nasal septum
CAS 542-75-6
cis-1,3-Dichloropropene
- OSHA PEL
- 1 ppm
- Method
- NIOSH 1003
Target organs: Respiratory tract; liver; kidneys
CAS 7440-48-4
Cobalt
- OSHA PEL
- 0.10 mg/m³
- Method
- NIOSH 7300
Target organs: Respiratory tract; heart; skin
CAS 7440-50-8
Copper (Fume)
- OSHA PEL
- 0.10 mg/m³
- Method
- NIOSH 7300
Target organs: Respiratory tract; liver
CAS 1319-77-3
Cresol (Mixed Isomers)
- OSHA PEL
- 5 ppm
- Method
- NIOSH 2546
Target organs: Skin; eyes; CNS
CAS 4170-30-3
Crotonaldehyde
- OSHA PEL
- 2 ppm
- Method
- NIOSH 2539
Target organs: Respiratory tract; eyes; skin
CAS 14808-60-7
Crystalline Silica (Quartz)
- OSHA PEL
- 0.050 mg/m³
- Method
- NIOSH 7500
Target organs: Lungs (silicosis)
- OSHA PEL
- 50 ppm
- Method
- NIOSH 1501
Target organs: CNS; respiratory tract; skin
CAS 110-82-7
Cyclohexane
- OSHA PEL
- 300 ppm
- Method
- NIOSH 1500
Target organs: CNS; eyes; skin
CAS 108-94-1
Cyclohexanone
- OSHA PEL
- 50 ppm
- Method
- NIOSH 1300
Target organs: CNS; eyes; respiratory tract
CAS 123-42-2
Diacetone Alcohol
- OSHA PEL
- 50 ppm
- Method
- NIOSH 1402
Target organs: Respiratory tract; eyes; CNS
CAS 75-71-8
Dichlorodifluoromethane
- OSHA PEL
- 1000 ppm
- Method
- NIOSH 1016
Target organs: Heart; CNS
CAS 109-89-7
Diethylamine
- OSHA PEL
- 25 ppm
- Method
- NIOSH 2010
Target organs: Respiratory tract; eyes; skin
CAS 109-87-5
Dimethoxymethane
- OSHA PEL
- 1000 ppm
- Method
- NIOSH 1611
Target organs: CNS; eyes; respiratory tract
CAS 124-40-3
Dimethylamine
- OSHA PEL
- 10 ppm
- Method
- NIOSH 2010
Target organs: Respiratory tract; eyes; skin
CAS 68-12-2
Dimethylformamide
- OSHA PEL
- 10 ppm
- Method
- NIOSH 2004
Target organs: Liver; skin
- OSHA PEL
- 1000 ppm
- Method
- NIOSH 1400
Target organs: CNS; eyes; respiratory tract
CAS 141-78-6
Ethyl Acetate
- OSHA PEL
- 400 ppm
- Method
- NIOSH 1457
Target organs: Eyes; respiratory tract; CNS
CAS 140-88-5
Ethyl Acrylate
- OSHA PEL
- 25 ppm
- Method
- NIOSH 1450
Target organs: Respiratory tract; eyes; skin
CAS 60-29-7
Ethyl Ether
- OSHA PEL
- 400 ppm
- Method
- NIOSH 1610
Target organs: CNS; respiratory tract
CAS 78-10-4
Ethyl Silicate
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1454
Target organs: Respiratory tract; eyes; kidneys
CAS 75-04-7
Ethylamine
- OSHA PEL
- 10 ppm
- Method
- NIOSH 2010
Target organs: Respiratory tract; eyes; skin
CAS 100-41-4
Ethylbenzene
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1501
Target organs: Eyes; respiratory tract; CNS
CAS 75-21-8
Ethylene Oxide
- OSHA PEL
- 1 ppm
- Method
- NIOSH 1614
Target organs: Respiratory tract; eyes; CNS
CAS 50-00-0
Formaldehyde
- OSHA PEL
- 0.75 ppm
- Method
- NIOSH 2016
Target organs: Respiratory tract; eyes; nose
CAS 64-18-6
Formic Acid
- OSHA PEL
- 5 ppm
- Method
- NIOSH 2011
Target organs: Respiratory tract; eyes; skin
CAS 111-30-8
Glutaraldehyde
- OSHA PEL
- 0.20 ppm
- Method
- NIOSH 2532
Target organs: Respiratory tract; eyes; skin
CAS 7782-42-5
Graphite (Natural)
- OSHA PEL
- 15 mg/m³
- Method
- NIOSH 0500
Target organs: Respiratory tract
CAS 77-47-4
Hexachlorocyclopentadiene
- OSHA PEL
- 0.010 ppm
- Method
- NIOSH 2510
Target organs: Respiratory tract; eyes
CAS 67-72-1
Hexachloroethane
- OSHA PEL
- 1 ppm
- Method
- NIOSH 1003
Target organs: Liver; kidneys; CNS
CAS 7664-39-3
Hydrofluoric Acid
- OSHA PEL
- 3 ppm
- Method
- NIOSH 7902
Target organs: Respiratory tract; skin; bone
CAS 10035-10-6
Hydrogen Bromide
- OSHA PEL
- 3 ppm
- Method
- NIOSH 7903
Target organs: Respiratory tract; eyes; skin
CAS 7647-01-0
Hydrogen Chloride
- OSHA PEL
- 5 ppm
- Method
- NIOSH 7903
Target organs: Respiratory tract; eyes; skin
CAS 74-90-8
Hydrogen Cyanide
- OSHA PEL
- 10 ppm
- Method
- NIOSH 6010
Target organs: CNS; heart; thyroid
CAS 7783-06-4
Hydrogen Sulfide
- OSHA PEL
- 20 ppm
- Method
- NIOSH 6013
Target organs: Respiratory tract; CNS
CAS 1309-37-1
Iron Oxide (Fume)
- OSHA PEL
- 10 mg/m³
- Method
- NIOSH 7300
Target organs: Respiratory tract
CAS 78-83-1
Isobutyl Alcohol
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1401
Target organs: Eyes; respiratory tract; CNS
CAS 78-59-1
Isophorone
- OSHA PEL
- 25 ppm
- Method
- NIOSH 2508
Target organs: Respiratory tract; eyes; CNS
CAS 108-21-4
Isopropyl Acetate
- OSHA PEL
- 250 ppm
- Method
- NIOSH 1454
Target organs: Eyes; respiratory tract; CNS
CAS 67-63-0
Isopropyl Alcohol
- OSHA PEL
- 400 ppm
- Method
- NIOSH 1400
Target organs: CNS; eyes; respiratory tract
CAS 7439-92-1
Lead (Inorganic)
- OSHA PEL
- 0.050 mg/m³
- Method
- NIOSH 7300
Target organs: CNS; blood; kidneys
- OSHA PEL
- 5 ppm
- Method
- NIOSH 2546
Target organs: Skin; eyes; CNS
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1501
Target organs: CNS; eyes; respiratory tract
CAS 7439-96-5
Manganese
- OSHA PEL
- 5 mg/m³
- Method
- NIOSH 7300
Target organs: CNS (manganism)
CAS 7439-97-6
Mercury (Elemental)
- OSHA PEL
- 0.10 mg/m³
- Method
- NIOSH 6009
Target organs: CNS; kidneys
- OSHA PEL
- 200 ppm
- Method
- NIOSH 2000
Target organs: CNS; optic nerve
CAS 79-20-9
Methyl Acetate
- OSHA PEL
- 200 ppm
- Method
- NIOSH 1458
Target organs: Eyes; respiratory tract; CNS
CAS 96-33-3
Methyl Acrylate
- OSHA PEL
- 10 ppm
- Method
- NIOSH 1450
Target organs: Respiratory tract; eyes; skin
CAS 74-83-9
Methyl Bromide
- OSHA PEL
- 20 ppm
- Method
- NIOSH 2520
Target organs: CNS; lungs; skin
CAS 74-87-3
Methyl Chloride
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1001
Target organs: CNS; liver; kidneys
CAS 78-93-3
Methyl Ethyl Ketone
- OSHA PEL
- 200 ppm
- Method
- NIOSH 2500
Target organs: CNS; eyes; respiratory tract
CAS 108-10-1
Methyl Isobutyl Ketone
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1300
Target organs: CNS; eyes; respiratory tract
CAS 80-62-6
Methyl Methacrylate
- OSHA PEL
- 100 ppm
- Method
- NIOSH 2537
Target organs: Respiratory tract; eyes; skin
CAS 110-43-0
Methyl n-Amyl Ketone
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1300
Target organs: CNS; respiratory tract
CAS 75-09-2
Methylene Chloride
- OSHA PEL
- 25 ppm
- Method
- NIOSH 1005
Target organs: CNS; liver; heart
CAS 7439-98-7
Molybdenum (Insoluble Compounds)
- OSHA PEL
- 15 mg/m³
- Method
- NIOSH 7300
Target organs: Respiratory tract
CAS 110-91-8
Morpholine
- OSHA PEL
- 20 ppm
- Method
- NIOSH 2013
Target organs: Respiratory tract; eyes; skin
CAS 123-86-4
n-Butyl Acetate
- OSHA PEL
- 150 ppm
- Method
- NIOSH 1450
Target organs: Eyes; respiratory tract; CNS
CAS 71-36-3
n-Butyl Alcohol
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1401
Target organs: Eyes; respiratory tract; CNS
- OSHA PEL
- 500 ppm
- Method
- NIOSH 1500
Target organs: Peripheral nervous system
CAS 91-20-3
Naphthalene
- OSHA PEL
- 10 ppm
- Method
- NIOSH 1500
Target organs: Eyes; blood; liver
CAS 7440-02-0
Nickel (Soluble Compounds)
- OSHA PEL
- 1 mg/m³
- Method
- NIOSH 7300
Target organs: Respiratory tract; skin
CAS 7697-37-2
Nitric Acid
- OSHA PEL
- 2 ppm
- Method
- NIOSH 7903
Target organs: Respiratory tract; eyes; skin
CAS 10102-43-9
Nitric Oxide
- OSHA PEL
- 25 ppm
- Method
- NIOSH 6014
Target organs: Respiratory tract; blood
CAS 98-95-3
Nitrobenzene
- OSHA PEL
- 1 ppm
- Method
- NIOSH 2017
Target organs: Blood; liver; CNS
CAS 10102-44-0
Nitrogen Dioxide
- OSHA PEL
- 5 ppm
- Method
- NIOSH 6014
Target organs: Respiratory tract
CAS 75-52-5
Nitromethane
- OSHA PEL
- 100 ppm
- Method
- NIOSH 2527
Target organs: Liver; CNS; respiratory tract
- OSHA PEL
- 5 ppm
- Method
- NIOSH 2546
Target organs: Skin; eyes; CNS
CAS 95-50-1
o-Dichlorobenzene
- OSHA PEL
- 50 ppm
- Method
- NIOSH 1003
Target organs: Liver; kidneys; eyes
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1501
Target organs: CNS; eyes; liver
- OSHA PEL
- 5 ppm
- Method
- NIOSH 2546
Target organs: Skin; eyes; CNS
CAS 106-46-7
p-Dichlorobenzene
- OSHA PEL
- 75 ppm
- Method
- NIOSH 1003
Target organs: Liver; kidneys; eyes
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1501
Target organs: CNS; eyes; respiratory tract
CAS 127-18-4
Perchloroethylene
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1003
Target organs: Liver; kidneys; CNS
- OSHA PEL
- 5 ppm
- Method
- NIOSH 2546
Target organs: Skin; eyes; CNS
CAS 7803-51-2
Phosphine
- OSHA PEL
- 0.30 ppm
- Method
- NIOSH 6002
Target organs: Respiratory tract; CNS; heart
CAS 7664-38-2
Phosphoric Acid
- OSHA PEL
- 1 ppm
- Method
- NIOSH 7903
Target organs: Respiratory tract; eyes; skin
CAS 65997-15-1
Portland Cement Dust
- OSHA PEL
- 5 mg/m³
- Method
- NIOSH 0500
Target organs: Respiratory tract; skin; eyes
CAS 79-09-4
Propionic Acid
- OSHA PEL
- 10 ppm
- Method
- NIOSH 2011
Target organs: Respiratory tract; eyes; skin
CAS 75-56-9
Propylene Oxide
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1612
Target organs: Respiratory tract; eyes; skin
- OSHA PEL
- 5 ppm
- Method
- NIOSH 1613
Target organs: Liver; kidneys; CNS
CAS 108-46-3
Resorcinol
- OSHA PEL
- 10 ppm
- Method
- NIOSH 2546
Target organs: Skin; eyes; thyroid
CAS 78-92-2
sec-Butyl Alcohol
- OSHA PEL
- 150 ppm
- Method
- NIOSH 1401
Target organs: Eyes; respiratory tract; CNS
CAS 7782-49-2
Selenium
- OSHA PEL
- 0.20 mg/m³
- Method
- NIOSH 7300
Target organs: Respiratory tract; eyes; skin
CAS 7440-22-4
Silver (Metal & Soluble Compounds)
- OSHA PEL
- 0.010 mg/m³
- Method
- NIOSH 7300
Target organs: Eyes; skin; respiratory tract
CAS 8052-41-3
Stoddard Solvent
- OSHA PEL
- 500 ppm
- Method
- NIOSH 1550
Target organs: CNS; skin; eyes
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1501
Target organs: CNS; liver; hearing
CAS 7446-09-5
Sulfur Dioxide
- OSHA PEL
- 5 ppm
- Method
- NIOSH 6004
Target organs: Respiratory tract; eyes
CAS 7664-93-9
Sulfuric Acid
- OSHA PEL
- 1 ppm
- Method
- NIOSH 7903
Target organs: Respiratory tract; eyes; skin
CAS 14807-96-6
Talc
- OSHA PEL
- 20 mg/m³
- Method
- NIOSH 0500
Target organs: Respiratory tract
CAS 75-65-0
tert-Butyl Alcohol
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1401
Target organs: Eyes; respiratory tract; CNS
CAS 109-99-9
Tetrahydrofuran
- OSHA PEL
- 200 ppm
- Method
- NIOSH 1609
Target organs: CNS; liver; skin
CAS 7440-31-5
Tin (Inorganic)
- OSHA PEL
- 2 mg/m³
- Method
- NIOSH 7300
Target organs: Respiratory tract; skin
CAS 13463-67-7
Titanium Dioxide
- OSHA PEL
- 15 mg/m³
- Method
- NIOSH 0600
Target organs: Lungs
- OSHA PEL
- 200 ppm
- Method
- NIOSH 1501
Target organs: CNS; liver; kidneys
CAS 584-84-9
Toluene Diisocyanate
- OSHA PEL
- 0.020 ppm
- Method
- NIOSH 5522
Target organs: Respiratory tract; asthma
CAS 79-01-6
Trichloroethylene
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1022
Target organs: Liver; CNS; heart
CAS 75-69-4
Trichlorofluoromethane
- OSHA PEL
- 1000 ppm
- Method
- NIOSH 1016
Target organs: Heart; CNS
CAS 121-44-8
Triethylamine
- OSHA PEL
- 25 ppm
- Method
- NIOSH 2010
Target organs: Eyes; respiratory tract; skin
CAS 7440-33-7
Tungsten (Insoluble Compounds)
- OSHA PEL
- 5 mg/m³
- Method
- NIOSH 7300
Target organs: Respiratory tract
CAS 8006-64-2
Turpentine
- OSHA PEL
- 100 ppm
- Method
- NIOSH 1551
Target organs: Respiratory tract; eyes; skin
CAS 1314-62-1
Vanadium Pentoxide
- OSHA PEL
- 0.50 mg/m³
- Method
- NIOSH 7300
Target organs: Respiratory tract
CAS 108-05-4
Vinyl Acetate
- OSHA PEL
- 10 ppm
- Method
- NIOSH 1453
Target organs: Respiratory tract; eyes; skin
CAS 75-01-4
Vinyl Chloride
- OSHA PEL
- 1 ppm
- Method
- NIOSH 1007
Target organs: Liver; CNS
CAS 8032-32-4
VM&P Naphtha
- OSHA PEL
- 300 ppm
- Method
- NIOSH 1550
Target organs: CNS; eyes; skin
CAS 1314-13-2
Zinc Oxide (Fume)
- OSHA PEL
- 5 mg/m³
- Method
- NIOSH 7030
Target organs: Metal fume fever; respiratory tract
Frequently asked questions
What is an OSHA PEL?
An OSHA Permissible Exposure Limit (PEL) is the legal limit for workplace air contaminant exposure, enforced by OSHA under 29 CFR 1910.1000. Most PELs are 8-hour time-weighted averages (TWAs); some agents carry short-term exposure limits (STELs) or ceiling values.
How is a NIOSH REL different from an OSHA PEL?
A NIOSH Recommended Exposure Limit (REL) is a non-regulatory recommendation from the National Institute for Occupational Safety and Health. RELs are generally more protective than PELs and are based on the most current health-effects research.
How do you measure workplace exposure?
Personal air samples are collected in the employee's breathing zone and analyzed using a NIOSH Manual of Analytical Methods (NMAM) procedure. Each chemical page lists its recommended sampling method.