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Chemical Sampling Information (CSI)
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General Description

Synonyms: 4-Methyl-2-Pentyl Acetate; 1,3-Dimethylbutyl acetate; Methylamyl Acetate; Methylisoamyl Acetate; Methyl Isoamyl Acetate; Methylisobutyl Carbinol Acetate; 4-Methyl-2-Pentanol Acetate; 4-Methyl-Pentyl-2-Acetate

OSHA IMIS Code Number: 1387

Chemical Abstracts Service (CAS) Registry Number: 108-84-9

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: SA7525000; 54783

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN1233 Flammable Liquid

Chemical Description and Physical Properties:

colorless liquid with a mild, pleasant fruity odor
molecular weight: 144
vapor pressure: 4 mm
boiling point: 285°F
melting point: -83°F

Incompatibilities: Nitrates, strong oxidizers, alkalies, and acids

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 50 ppm, 300 mg/m3

Construction Industry: 50 ppm, 300 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 50 ppm, 295 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 50 ppm TWA

Health Factors

Potential Symptoms: Headaches; In animals: eye, nose, throat irritation: narcosis

Health Effects: Irritation-Eye, Nose, Throat, Skin---Mild (HE16)

Affected Organs: CNS, eyes

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Charcoal Tube (100/50 mg sections, 20/40 mesh)
    analytical solvent: Carbon Disulfide
    maximum volume: 10 Liters 
    maximum flow rate: 0.2 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: 1 (NIOSH 1450 [107 KB PDF, 6 pages])
    sampling analytical error: 0.10
    method classification: Fully Validated

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Instrumentation
    company: Infrared Spectrophotometer
    part #: MIRAN 1A & 1B
    range: 0.3 ppm @ 9.6 um
    class: Mfg

  • device: Instrumentation
    company: Infrared Spectrophotometer
    part #: MIRAN 103
    range: 0-50 ppm @ 9.6 um
    class: Mfg

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