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Odorous Substances

Odorous Substances (Osmogenes) and odor thresholds

Formula Characteristic Odour Odour Threshold (ppm) Recognition Threshold 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 fishy 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

For odor treatment and control on the above components



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