Ozone Odor Thresholds

23rd Apr 2020

Odor Thresholds for Ozone Reactive Compounds

NAME CHEMICAL FORMULA CHARACTERISTIC ODOR ODOR THRESHOLD (ppm) RECOGNITION THRESHOLD (ppm) MOLECULAR WEIGHT
Acetaldehyde

CH3•CHO

pungent, fruity 0.004 0.21 44.05
Allyl mercaptan

CH2•CH•CH2•SH

strong garlic, coffee 0.0005 -- 74.15
Ammonia

NH3

sharp, pungent 0.037 46.8 17.03
Amyl mercaptan

CH3•(CH2)3•CH2•SH

unpleasant, putrid 0.0003 -- 104.22
Benzyl mercaptan

C6H5•CH2•SH

unpleasant, strong 0.00019 -- 124.21
Butylamine

C2H5•CH2•CH2•NH2

sour, ammonia-like -- 0.24 73.14
Cadaverine

H2N•(CH2)5•NH2

putrid, decaying flesh -- -- 102.18
Chlorine

Cl2

pungent, suffocating 0.01 0.314 70.91
Chlorophenol

ClC6H5O

medicinal, phenolic 0.00018 -- 128.55
Crotyl mercaptan

CH3•CH:CH•CH2•S

skunk-like 0.000029 -- 90.19
Dibutylamine

(C4H9)2NH

  0.016 -- 129.25
Diisopropylamine

(C3H7)2NH

fishy 0.0035 0.085 101.19
Dimethylamine

(CH3)2NH

putrid, fishy 0.047 0.047 45.08
Dimethyl sulfide

(CH3)2S

decayed vegetables 0.001 0.001 62.13
Diphenyl sulfide

(C6H5)2S

unpleasant 0.000048 0.0021 186.28
Ethylamine

C2H5•NH2

ammoniacal 0.83 0.83 45.08
Ethyl mercaptan

C2H5•SH

decayed cabbage 0.00019 0.001 62.1
Hydrogen sulfide

H2S

rotten eggs 0.00047 0.0047 34.1
Indole

C2H6NH2

recal, nauseating -- -- 117.15
Methylamine

CH3NH2

putrid, fishy 0.021 0.021 31.05
Methyl mercaptan

CH3SH

decayed cabbage 0.0011 0.0021 48.1
Ozone

O3

irritating above 2 ppm 0.001 -- 48
Propyl mercaptan

CH3•CH2•CH2•SH

unpleasant 0.000075 -- 76.16
Putrescine

NH2(CH2)4NH2

putrid, nauseating -- -- 88.15
Pyridine

C6H5N

disagreeable, irritating 0.0037 -- 79.1
Skatole

C9H9N

fecal, nauseating 0.0012 0.47 131.2
Sulfur dioxide

SO2

pungent, irritating 0.009 -- 64.07
Tert-butyl

(CH3)3C•SH

skunk, unpleasant 0.00008 -- 90.19
Thiocresol

CH3•C6•H4•SH

skunk, rancid 0.0001 -- 124.21
Thiophenol

C6H5SH

putrid, garlic-like 0.000026 0.28 110.18
Triethylamine

(S2H5)3N

ammoniacal, fishy 0.08 -- 101.19