CAS RN: 7803-51-2

Odor Threshold

0.03 ppm
Air: 0.51 uL/L; Water: 0.0002 mg/L; Odor Safety Class: D; D= 10-50% of attentive persons can detect TLV concn in the air.
Phosphine's characteristic decayed fish odor is barely detectable at concentrations of 1.5 to 3 ppm.
Phosphine has a fishy or garlic-like odor, detectable at about 2 ppm, but this odor threshold does not provide sufficient warning of toxic exposure.
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