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Registry of Toxic Effects of Chemical Substances (RTECS)

3-Butyn-2-ol, 2-methyl-

RTECS #

ES0810000

CAS #

115-19-5

Updated

July 2011

Molecular Weight

84.13

Molecular Formula

C5H8O

Synonyms

1,1-Dimethylpropargyl alcohol
1,1-Dimethylpropynol
1-Butyn-3-ol, 3-methyl-
2-Hydroxy-2-methyl-3-butyne
2-Methyl-3-butyn-2-ol
2-Methylbutyn-3-ol-2
3-Methyl-1-butyn-3-ol
3-Methyl-butin-(1)-ol-(3) (German)
alpha,alpha-Dimethylpropargyl alcohol
Dimethylacetylenecarbinol
Dimethylacetylenylcarbinol
Dimethylethynylcarbinol
Dimethylethynylmethanol
Ethynyldimethylcarbinol
MBY

Acute Toxicity Data and References

Route/OrganismDoseEffectReference
inhalation/mouse lethal concentration (50 percent kill): 2 gm/m3Behavioral: Somnolence (general depressed activity)

Behavioral: Ataxia

Lung, Thorax, or Respiration: Other changes
GTPZAB 31(4),55,1987
inhalation/mouse lethal concentration (50 percent kill): 2000 mg/m3Lung, Thorax, or Respiration: Respiratory depression

Behavioral: General anesthetic

Behavioral: Ataxia
VCVGK* -,125,1984
oral/mouse lethal dose (50 percent kill): 500 mg/kgVCVGK* -,125,1984
oral/mouse lethal dose (50 percent kill): 500 mg/kgBehavioral: Somnolence (general depressed activity)

Behavioral: Ataxia

Lung, Thorax, or Respiration: Other changes
GTPZAB 31(4),55,1987
oral/rat lethal dose (50 percent kill): 1950 mg/kgJPETAB 115,230,1955
subcutaneous/mouse lethal dose (50 percent kill): 1161 mg/kgBehavioral: Somnolence (general depressed activity)

Behavioral: Convulsions or effect on seizure threshold
YKKZAJ 76,181,1956

Standards and Regulations

OrganizationStandardReference
Occupational Exposure Limit-AUSTRIAMAK-TMW 0.9 ppm (3 mg/m3);KZW 1.8 ppm (6 mg/m3), 2007
Occupational Exposure Limit-RUSSIAshort term exposure limit 10 mg/m3, JUN2003

NIOSH Documentation and Surveillance

OrganizationStandardReference
National Occupational Exposure Survey 1983Hazard Code X1058; Number of Industries 2; Total Number of Facilities 67; Number of Occupations 5; Total Number of Employees Exposed 3234; Total Number of Female Employees Exposed 2672

Status in Federal Agencies

OrganizationReference
EPA TSCA Section 8(b) CHEMICAL INVENTORY
EPA TSCA Section 8(d) unpublished health/safety studies
EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JANUARY 2001
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