PUNGENT MALODOROUS SUBSTANCES
Substance Formula Characteristic Odor Odor Threshold (ppm)
 

Allyl Mercaptan

CH2 • CH • CH2 • SH

strong garlic, coffee

0.00005

Ammonia

NH3

sharp, pungent

0.037

Benzyl Mercaptan

C6H5 • CH2 • SH

unpleasant, strong

0.00019

Butylamine

C2H5 • CH2 • CH2 • NH2

sour, ammonia-like

-

Chlorine

Cl2

pungent, suffocating

0.01

Chlorophenol

ClC6H5O

medicinal, phenolic

0.00018

Crotyl Mercaptan

CH3 • CH : CH • CH2 • SH

skunk-like

0.000029

Dibutylamine

(C4H9)2 NH

fishy

0.016

Diisopropylamine

(C3H7)2 NH

fishy

0.0035

Dipheny Sulfide

(C6H5)2 S

unpleasant

0.000048

Ethylamine

C2H5 • NH2

ammoniacal

0.83

Propyl Mercaptan

CH3 • CH2 • CH2 • SH

unpleasant

0.000075

Pyridine

C6H5 N

disagreeable, irritating

0.0037

Sulfur Dioxide

SO2

pungent, irritating

0.009

Tert-Butyl Mercaptan

(CH3)3C • SH

skunk, unpleasant

0.00008

Trietylamine

(C2H5)3 N

ammoniacal, fishy

0.08


 

                                      PUTRID MALODOROUS SUBSTANCES
Substance Formula Characteristic Odor Odor Threshold (ppm)

 

Amyl Mercaptan

CH3 • (CH2)3 • CH2 • SH

unpleasant, putrid

0.0003

Cadaverine

H2N • (CH2)5 • NH2

putrid, decaying flesh

-

Dimethylamine

(CH3)2 NH

putrid, fishy

0.047

Dimethyl sulifide

(CH3)2 S

decayed vegetables

0.001

Ethyl Mercaptan

C2H5 align="middle" SH

decayed cabbage

0.00019

Hydrogen Sulfide

H2S

rotten eggs

0.00047

Indole

C2H6 NH

fecal, nauseating

-

Methylamine

CH3 NH2

putrid, fishy

0.021

Methyl Mercaptan

CH3 SH

decayed cabbage

0.0011

Putrescine

NH2 (CH2)4 NH2

putrid, nauseating

-

Skatole

C9H9 N

fecal, nauseating

0.0012

Thiocresol

CH3 • C6H4 • SH

skunk, rancid

0.0001

Thiophenol

C6H5 SH

putrid, garlic-like

0.000062

Tabular information courtesy of the Water Pollution Control Federation.
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Generally all odors will fall into one or more of the following categories.  Contact us for your odor challenges.  WE HAVE A SOLUTION!!!