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Odor Thresholds of Common Rendering Emissions
Odor thresholds refer to the subjective nature of the human nose being able to detect a particular compound. Below is a list of typical compounds found in rendering operations along with a high and low odor threshold. Different studies have shown different thresholds. The majority of the below list was derived from information from the American Industrial Hygiene Association. Studies have shown that some people can smell certain compounds better than others. This range demonstrates that. It is intended as a guideline.
|
Low Odor Threshold |
High Odor Threshold |
| Compound |
ppm |
ppm |
| Methylamine |
0.01950 |
9.28783 |
| Ethylamine |
0.25917 |
211.17657 |
| Dimethylamine |
0.04511 |
0.04511 |
| Diethylamine |
0.01972 |
37.47006 |
| Trimethylamine |
0.00019 |
0.00019 |
| Allyl Mercaptan |
0.00006 |
0.01670 |
| Methyl Mercaptan |
0.00002 |
0.04097 |
| Ethyl Mercaptan (Above 95 F) |
0.00001 |
0.03560 |
| Hydrogen Sulfide |
0.00049 |
0.00988 |
| Dimethyl Sulfide |
0.00097 |
0.01966 |
| Acetaldehyde |
0.00011 |
2.25938 |
| Formaldehyde |
1.17678 |
58.83916 |
| Ammonia |
0.03755 |
55.90041 |
| Acetic Acid |
1.00083 |
100.08326 |
| Butyric |
0.00027 |
2.45557 |
| Formic |
0.02350 |
19.74173 |
| Chlorine |
0.01017 |
5.08532 |
| Chlorine Dioxide |
0.10692 |
0.10692 |
| Ozone |
0.00050 |
0.51085 |
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