Risk Assessment

Environmental Health Division

Air Values Table

The Minnesota Department of Health (MDH) develops health-based rules and guidance to evaluate potential human health risks from exposures to chemicals in ambient air. For more information, see: Health-Based Rules and Guidance for Air or contact the Health Risk Assessment Unit.

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Value Type Key:

HRV = Health Risk Value
HBV = Health-Based Value
RAA = Risk Assessment Advice

Duration Key:

Acute = one hour averaged exposure concentration
Subchronic = 13 week averaged exposure concentration
Chronic = annual averaged exposure concentration


Find chemicals beginning with: A - C D - E F - M N - S T - Z
CAS Number	Chemical	Value Type	Exposure Duration	Value (ug/m³)***	Health Endpoint(s)
75-07-0	Acetaldehyde	HRV	Chronic	5	Cancer
75-05-8	Acetonitrile	HRV	Chronic	60	Mortality
107-02-8	Acrolein	HBV	Acute	5	Irritant-eye
		HBV	Subchronic	1	Upper respiratory system
		HBV	Chronic	0.4	Upper respiratory system
79-10-7	Acrylic acid	HRV	Subchronic	3	Upper respiratory system
107-13-1	Acrylonitrile	HRV	Chronic	0.1	Cancer
107-05-1	Allyl chloride	HRV	Subchronic	10	Nervous system
7664-41-7	Ammonia	HRV	Acute	3,200	Irritant-eye and respiratory system
7664-41-7	Ammonia	HRV	Chronic	80	Upper and lower respiratory system
7440-36-0	Antimony	HRV	Multi-Media	0.4***	Hematologic system
1309-64-4	Antimony Trioxide	HRV	Chronic	0.2	Lower respiratory system
7440-38-2	Arsenic	HRV	Chronic	0.002	Cancer
7440-38-2	Arsenic	HRV	Multi-Media	0.007***	Cancer
7784-42-1	Arsine	HRV	Acute¹	200	Hematologic system
7784-42-1	Arsine	HRV	Subchronic	0.1	Hematologic system
71-43-2	Benzene	HRV	Acute	1,000	Reproductive/Developmental
71-43-2	Benzene	HRV	Chronic	1.3-4.5	Cancer
92-87-5	Benzidine	HRV	Chronic	0.0002	Cancer
50-32-8	Benzo[a]pyrene	HRV	Multi-Media	0.001***	Cancer
7440-41-7	Beryllium	HRV	Chronic	0.004	Cancer
542-88-1	Bis (chloromethyl) ether	HRV	Chronic	0.0002	Cancer
74-83-9	Bromomethane	HRV	Chronic	5	Upper respiratory system
106-94-5	1-Bromopropane (PDF: 95KB/5 pages)	HBV	Acute	50,000	Development
			Subchronic	4,000	Nervous system
			Chronic	20	Respiratory system
106-99-0	1,3-Butadiene (PDF: 98KB/4 pages)	HBV	Chronic	0.2	Cancer
7440-43-9	Cadmium	HRV	Chronic	0.006	Cancer
7440-43-9	Cadmium	HRV	Multi-Media	0.5***	Renal system
75-15-0	Carbon Disulfide	HRV	Acute	6,000	Reproductive/Developmental
75-15-0	Carbon Disulfide	HRV	Chronic	700	Nervous system
12789-03-6	Chlordane	HRV	Subchronic	7	Hepatic system
7782-50-5	Chlorine	HRV	Acute	290	Irritant-respiratory system
10049-04-4	Chlorine Dioxide	HRV	Subchronic	0.6	Lower respiratory system
532-27-4	2-Chloroacetophenone	HRV	Chronic	0.03	Upper and lower respiratory system
67-66-3	Chloroform	HRV	Acute	150	Reproductive/Developmental
18540-29-9	Chromic Acid Mists and Dissolved Cr (VI) aerosols	HRV	Subchronic	0.02	Upper and lower respiratory system
	Cr (VI) Particulates		Subchronic	1	Lower respiratory system
	Chromium VI		Chronic	0.0008	Cancer
8007-45-2	Coke Oven Emissions	HRV	Chronic	0.02	Cancer
98-82-8	Cumene	HRV	Subchronic	4,000	Renal system; endocrine system
96-12-8	1,2-Dibromo-3-Chloropropane	HRV	Subchronic	2	Male reproductive system
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106-93-4	1,2-Dibromoethane	HRV	Chronic	0.05	Cancer
106-46-7	1,4-Dichlorobenzene	HRV	Subchronic	800	Hepatic system
75-09-2	Dichloromethane	HRV	Acute	10,000	Nervous system
75-09-2	Dichloromethane	HRV	Chronic	20	Cancer
78-87-5	1,2-Dichloropropane	HRV	Subchronic	10	Upper respiratory system
542-75-6	1,3-Dichloropropene	HRV	Chronic	20	Upper respiratory system
62-73-7	Dichlorvos	HRV	Chronic	0.5	Nervous system
77-73-6	Dicyclopentadiene	HRV	Subchronic	3	Renal system
NA	Diesel Particulates	HRV	Chronic	5	Lower respiratory system
123-91-1	1,4-Dioxane	HRV	Acute	3,000	Irritant-eye and nasal
NA	Dioxins	RAA	Chronic	ND	Cancer
108-01-0	2-Dimethylamino ethanol	HRV	Subchronic	70	Upper respiratory system
68-12-2	N,N-Dimethylformamide	HRV	Chronic	30	Hepatic system
106-89-8	Epichlorohydrin	HRV	Chronic	8	Cancer
106-88-7	1,2-Epoxybutane	HRV	Chronic	20	Upper respiratory system
NA	Ethanol (and related compounds) **	RAA	Chronic/Acute	multiple	Irritant
100-41-4	Ethyl Benzene	HRV	Acute	10,000	Reproductive/Developmental
75-00-3	Ethyl Chloride	HRV	Acute	100,000	Reproductive/Developmental
111-76-2	Ethylene Glycol Monobutyl Ether (EGBE)	HRV	Chronic	13,000	Hematologic system
110-80-5	Ethylene Glycol Monoethyl Ether	HRV	Acute	400	Reproductive/Developmental
111-15-9	Ethylene Glycol Monoethyl Ether Acetate	HRV	Acute	100	Reproductive/Developmental
109-86-4	Ethylene Glycol Monomethyl Ether	HRV	Acute	90	Reproductive/Developmental
110-80-5 (or 109-86-4)	Ethylene Glycol Monomethyl Ether (EGME) or 2-Methoxyethanol	HRV	Subchronic	60	Male reproductive system; hematologic system
50-00-0	Formaldehyde	HRV	Acute	94	Irritant-eye and respiratory system
50-00-0	Formaldehyde	RAA	Chronic²*	2.0	Cancer
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822-06-0	1,6-Hexamethylene Diisocyanate	HRV	Chronic²	0.01	Upper and lower respiratory system
110-54-3	n-Hexane	HRV	Chronic	2000	Nervous system; upper respiratory system
302-01-2	Hydrazine and Hydrazine Sulfate	HRV	Chronic	0.002	Cancer
7647-01-0	Hydrogen Chloride	HRV	Acute	2,700	Irritant-eye and respiratory system
7647-01-0	Hydrogen Chloride	HRV	Chronic	20	Upper respiratory system
74-90-8	Hydrogen Cyanide	HRV	Acute¹	700	Nervous system
74-90-8	Hydrogen Cyanide	HRV	Chronic	3	Nervous system; endocrine system
7664-39-3	Hydrogen Fluoride	HRV	Acute	240	Irritant-respiratory system
7783-06-4	Hydrogen Sulfide	HRV	Subchronic	10	Upper respiratory system
7439-96-5	Manganese	HRV	Chronic	0.2	Nervous system
7439-96-5	Manganese	HRV	Multi-Media	140***	Nervous system
67-56-1	Methanol	HRV	Acute	25,000	Nervous system
74-83-9	Methyl Bromide	HRV	Acute¹	2,000	Nervous system
78-93-3	Methyl Ethyl Ketone	HRV	Acute	10,000	Irritant-eye and respiratory system
80-62-6	Methyl Methacrylate	HRV	Chronic²	700	Upper and lower respiratory system
101-68-8; 9016-87-9	Methylene Diphenyl Diisocyanate and Polymeric MDI	HRV	Chronic²	0.6	Upper and lower respiratory system
22967-92-6	Methylmercury	HRV	Multi-Media	0.1***	Developmental; nervous system
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91-20-3	Naphthalene	HBV	Acute	200	Respiratory system
91-20-3	Naphthalene	HBV	Chronic	9	Respiratory system
7440-02-0	Nickel	HRV	Multi-Media	20***	Decreased body and organ weights
NA	Nickel and Nickel Compounds	HRV	Acute	11	Irritant-respiratory system
NA	Nickel Refinery Dust	HRV	Chronic	0.04	Cancer
12035-72-2	Nickel Subsulfide	HRV	Chronic	0.02	Cancer
7697-37-2	Nitric Acid	HRV	Acute	130	Irritant-respiratory system
10102-44-0	Nitrogen Dioxide	HBV	Acute	470	Respiratory system
79-46-9	2-Nitropropane	HRV	Chronic	20	Hepatic system
108-95-2	Phenol	HRV	Acute	5,800	Irritant-eye and respiratory system
75-44-5	Phosgene	HRV	Acute	4	Irritant-respiratory system
7803-51-2	Phosphine	HRV	Subchronic	3	Decreased body weight
1336-36-3	Polychlorinated Biphenyls	HRV	Multi-Media	0.05***	Developmental
NA	Polycyclic Aromatic Hydrocarbons (PAHs)	RAA	Chronic	multiple	Cancer
107-98-2	Propylene Glycol Monomethyl Ether	HRV	Subchronic	20,000	Nervous system
75-56-9	Propylene Oxide	HRV	Chronic	3	Cancer
1310-73-2	Sodium Hydroxide	HRV	Acute	8	Irritant-eye, skin, and respiratory system
100-42-5	Styrene	HRV	Acute	21,000	Irritant-eye and respiratory system
100-42-5	Styrene	HRV	Chronic	1000	Nervous system
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127-18-4	Tetrachloroethylene (PDF:80KB/3 pages)	HRV	Acute	20,000	Irritant-eye and respiratory system; nervous system
127-18-4	Tetrachloroethylene (PDF:80KB/3 pages)	RAA	Chronic	see advice	-----
108-88-3	Toluene	HRV	Acute	37,000	Irritant-eye and respiratory system; nervous system
108-88-3	Toluene	HRV	Chronic	400	Nervous system; upper respiratory system
26471-62-5	2,4-/2,6-Toluene Diisocyanate	HRV	Chronic²	0.08	Lower respiratory system
71-55-6	1,1,1-Trichloroethane	HRV	Acute	140,000	Nervous system
79-01-6	Trichloroethylene	HRV	Acute	2,000	Reproductive/Developmental
79-01-6	Trichloroethylene	HBV	Chronic	3	Cancer
121-44-8	Triethylamine	HRV	Acute	2,800	Irritant-eye; transient corneal edema
121-44-8	Triethylamine	HRV	Subchronic	70	Upper respiratory system
1314-62-1	Vanadium Pentoxide	HRV	Acute	30	Irritant-respiratory system
108-05-4	Vinyl Acetate	HRV	Chronic	200	Upper respiratory system
75-01-4	Vinyl Chloride	HRV	Chronic	1	Cancer
1330-20-7	Xylenes	HRV	Acute	43,000	Irritant-eye and respiratory system; nervous system
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NA = Not Applicable

ND = Not Determined. Note the Minnesota Pollution Control Agency has calculated an inhalation unit risk of 400 (ug/m³)^-1 using the MDH and US EPA recommended oral slope factor for 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD).

* This HBV supercedes the Health Risk Value.

** These values are considered to be protective of the general population, but MDH regards them as sector specific for ethanol production facilities. MDH cannot endorse the routine use of these values for other types of facilities.

***Multi-media values for oral exposures are expressed as micrograms per kilogram body weight per day of exposure (ug/kg-day).

¹ This HRV is for a chemical where there is little magnitude difference between the level where mild irritancy occurs and levels where more severe adverse health effects occur.

² This HRV may not provide protection for individuals who have been previously sensitized to this chemical.

Minnesota Department of Health

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