Immediately Dangerous to Life or Health Concentrations (IDLH)
CAS number: 71–36–3
NIOSH REL: 50 ppm (150 mg/m3) CEILING [skin]
Current OSHA PEL: 100 ppm (300 mg/m3) TWA
1989 OSHA PEL: 50 ppm (150 mg/m3) CEILING [skin]
1993-1994 ACGIH TLV: 50 ppm (152 mg/m3) CEILING [skin]
Description of Substance: Colorless liquid with a strong, characteristic, mildly alcoholic odor.
LEL: . . 1.4% (10% LEL, 1,400 ppm)
Original (SCP) IDLH: 8,000 ppm
Basis for original (SCP) IDLH: The chosen IDLH is conservative, but the only data available on which to base the IDLH is the statement by Patty  that Smyth  found rats survived when exposed for 4 hours to 8,000 ppm. The IDLH for isobutyl alcohol is also 8,000 ppm.
Short-term exposure guidelines: None developed
ACUTE TOXICITY DATA
Lethal concentration data:
|Species||Reference||LC5o(ppm)||LCLo(ppm)||Time||Adjusted 0.5-hrLC (CF)||DerivedValue|
|MammalRat||Esin and Vigdergauz 1986NPIRI 1974||9,2218,000||———-||?4 hr||?16,000 ppm (2.0)||?1,600 ppm|
Lethal dose data:
|Species||Reference||Route||LD50(mg/kg)||LDLo(mg/kg)||Adjusted LD||Derived value|
|Munch 1972Purchase 1969
|7,918 ppm1,795 ppm
|792 ppm180 ppm
Other animal data: RD50 (mouse), 4,784 ppm [Alarie 1981].
Human data: It has been reported that corneal irritation was occasionally observed in workers exposed to 200 ppm [Sterner et al. 1949].
|Revised IDLH: 1,400 ppm [LEL]Basis for revised IDLH: Based on health considerations and acute inhalation toxicity data in animals [NPIRI 1974], a value of about 1,600 ppm would have been appropriate for n-butyl alcohol. However, the revised IDLH for n-butyl alcohol is 1,400 ppm based strictly on safety considerations (i.e., being 10% if the lower explosive limit of 1.4%).|
1. Alarie Y . Dose-response analysis in animal studies: prediction of human responses. Environ Health Perspect 42:9-13.
2. Esin MS, Vigdergauz MS . Correlation between toxicity indexes and chromatographic characteristics of chemical substances. Gig Sanit 51(5):61-62 (in Russian).
3. Munch JC . Aliphatic alcohols and alkyl esters: narcotic and lethal potencies to tadpoles and to rabbits. Ind Med Surg 41:31-33.
4. NPIRI . Raw materials data handbook, physical and chemical properties, fire hazard and health hazard data. Vol. 1. Organic solvents. Bethlehem, PA: National Printing Ink Research Institute, p. 10.
5. Patty FA, ed. . Industrial hygiene and toxicology. 2nd rev. ed. Vol. II. Toxicology. New York, NY: Interscience Publishers, Inc., p. 1443.
6. Purchase IFH . Studies in kaffircorn malting and brewing. XXII. The acute toxicity of some fusel oils found in Bantu beer. S Afr Med J 43:795-798.
7. Smyth HF Jr . Improved communication: hygienic standards for daily inhalation. Am Ind Hyg Assoc Q 17(2):129-185.
8. Sterner JH, Crouch HC, Brockmyre HF, Cusack M . A ten-year study of butyl alcohol exposure. Am Ind Hyg Assoc Q 10:53-59.
9. Wurtz M . Sur les proprietes toxiques des alcools par fermentation. Comp Rend Hebdom 81:192-194 (in French).