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Table 5 RfC values of odor compounds for calculating hazard quotients in this exposure scenario

From: Gaseous pollutants from a small-scale aerobic biological treatment facility: odor and health risk assessment

Family Compound Classification Critical effect system RfC (mg/m3)
  Ammonia Respiratory 5 × 10–1
VFAs Acetic acid
Propionic acid
Isobutyric acid
Butanoic acid
Isovaleric acid
Alcohols Methanol Nervous 2 × 101
Ethanol
Propanol
n-Butanol
2-Butanol
Isobutanol
3-Pentanol
2-Pentanol
Aromatics Benzene A Immune(lymphocyte decreased) 3 × 10–2
Toluene D Nervous 5.00
Ethylbenzene D Hepatic, urinary 1.00
p-Xylene Nervous 1.00 × 10–1
m-Xylene Nervous 1.00 × 10–1
o-Xylene Nervous 1.00 × 10–1
Styrene Nervous 1.00
Carbonyls Formaldehyde B1 Squamous cell carcinomas
Acetaldehyde B2 Respiratory 9 × 10–3
Acrolein Respiratory and peripheral 2 × 10–5
Butyraldehyde
Benzaldehyde
Acetone
Pentanone
RSCs Hydrogen sulfide Nervous, respiratory 2.00 × 10–3
Carbonyl sulfide
Methyl mercaptan
Ethyl mercaptan
Dimethyl sulfide
Carbon disulfide Nervous(peripheral nervous system dysfunction) 7.00 × 10–1
Propyl mercaptan
Thiophene
Diethyl sulfide
Dimethyl disulfide
Diethyl disulfide
Dimethyl trisulfide
Terpenes α-Pinene
β-Pinene
(+)-3-Carene
D-Limonene
Cineole
α-Terpinene
γ-Terpinene
p-Cymene
  1. Carcinogenic classification method from weight-of-evidence of IRIS; A, carcinogenic to human; B1, possible carcinogen; B2, probable carcinogen; C, carcinogenicity to human body has not been classified; D, may not be carcinogenic; –, not available.