Immediately Dangerous to Life or Health Concentrations (IDLH)
CAS number: 104-94-9
NIOSH REL: 0.5 mg/m3 TWA [skin]
Current OSHA PEL: 0.5 mg/m3 TWA [skin]
1989 OSHA PEL: Same as current PEL
1993-1994 ACGIH TLV: 0.1 ppm (0.5 mg/m3) TWA [skin]
Description of substance: Yellow to brown, crystalline solid with an amine-like odor.
Original (SCP) IDLH: 50 mg/m3
Basis for original (SCP) IDLH: Because no data on acute inhalation toxicity are available for anisidine (o-, p-isomers), the chosen IDLH is based on chronic data. ACGIH  reported that mice survived exposures to 10 to 30 mg/m3 for 2 hours/day, 6 days/week for 1 month; a decrease in the excitability of nerves was noted [Zaeva and Fedorova 1962]. Because mice survived 30 mg/m3, 2 hours/day, 6 days/week for 1 month, a worker should be able to escape from 50 mg/m3 without injury or irreversible health effects.
Short-term exposure guidelines: None developed
ACUTE TOXICITY DATA
Lethal dose data:
|Rabbit||IARC 1982||oral||2,900||—–||20,300 mg/m3||2,030 mg/m3|
|Mouse||IARC 1982||oral||1,300||—–||9,100 mg/m3||910 mg/m3|
|Mouse||Nippon 1956||oral||—–||1,000||7,000 mg/m3||700 mg/m3|
|Rat||Sziza and Podragyai 1957||oral||1,400||—–||9,800 mg/m3||980 mg/m3|
Other animal data: Mice have survived exposures to concentrations of 10 to 30 mg/m3 for 2 hours/day, 6 days/week for 1 month with a only decrease in the excitability of nerves noted [Zaeva and Fedorova 1962].
Human data: None relevant for use in determining the revised IDLH.
Revised IDLH: 50 mg/m3 [Unchanged]
Basis for revised IDLH: Based on subchronic inhalation toxicity data in animals [Zaeva and Fedorova 1962], the original IDLH for p-anisidine of 50 mg/m3 is not being revised at this time.
- ACGIH . Anisidine (o-, p-isomers). In: Documentation of the threshold limit values for substances in workroom air. 3rd ed. Cincinnati, OH: American Conference of Governmental Industrial Hygienists, p. 14.
- IARC . IARC monographs on the evaluation of carcinogenic risk of chemicals to humans. Vol. 27. Lyon, France: World Health Organization, International Agency for Research on Cancer, p. 63.
- Nippon Yakurigaku Zasshi (Japanese Journal of Pharmacology) ; 52:215-221 (in Japanese).
- Sziza M, Podragyai L . Toxikologische untersuchung einiger in der ungarischen industrie zur anwendung gelangenden aromatischen amidoverbindungen. Arch Gewerbepath Gewerbehyg 15:447-456 (in German).
- Zaeva GN, Fedorova VI . Toxsikol Nov Prom Khim Vesh 4:91 (in Russian).