Assertion: acetaldehyde | /r/HasProperty | silverman et al.
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Source sentences:
text: Ocular irritation has been observed at concentrations as low as 25 ppm (45 mg/m3) acetaldehyde (Silverman et al., 1946), while nasal and/or throat (sensory) irritation has been observed following exposure to concentrations just less than 200 ppm (360 mg/m3) (Sim and Pattle, 1957).