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Chemical Sampling Information (CSI)
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General Description

Synonyms: Allylene; Propyne

OSHA IMIS Code Number: 1651

Chemical Abstracts Service (CAS) Registry Number: 74-99-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: UK4250000; 68746

Chemical Description and Physical Properties:

colorless gas with a sweet odor.
molecular weight: 40
vapor pressure: 3800 mm
boiling point: -10°F
melting point: -153°F

Incompatibilities: Strong oxidizers, chlorine, copper, copper alloys

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 1000 ppm, 1650 mg/m3

Construction Industry: 1000 ppm, 1650 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 1000 ppm, 1640 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 1000 ppm TWA

Health Factors

Potential Symptoms: Hyperexcitability, tremors, anesthesia; respiratory system irritation

Health Effects: Explosive (HE18); Narcosis (HE8)

Affected Organs: CNS

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Two Charcoal Tubes in series (100/50 mg sections, 20/40 mesh)
    analytical solvent: Carbon Disulfide
    maximum volume: 2 Liters
    maximum flow rate: 0.05 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: 2 (OSHA In-House File)
    method classification: Not Validated

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Instrumentation
    company: Infrared Spectrophotometer
    part #: MIRAN 1A & 1B
    range:
    2.8 ppm @ 3.0 um
    class: Mfg

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