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Chemical Sampling Information (CSI)
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General Description

Synonyms: MAPP gas; Methyl acetylene-allene mixture; Propyne-allene mixture

OSHA IMIS Code Number: 1652

Chemical Abstracts Service (CAS) Registry Number: 59355-75-8

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: UK4920000; 68750

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN1060 Flammable Gas

Chemical Description and Physical Properties:

colorless gas with a strong, characteristic, foul odor
molecular weight:
40
boiling point: -36°F to -4°F

Incompatibilities: Strong oxidizers, copper alloys (>67% copper)

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 1000 ppm, 1800 mg/m3

Construction Industry: 1000 ppm, 1800 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 1000 ppm, 1640 mg/m3 TWA; 1250 ppm, 2050 mg/m3 STEL

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 1000 ppm TWA, 1250 ppm STEL

Health Factors

Potential Symptoms: Frostbite; disorientation; excitement

Health Effects: Narcosis (HE8)

Affected Organs: CNS, skin, eyes

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 (TWA)
    maximum volume: 0.75 Liters
    maximum flow rate: 0.05 L/min (STEL)
    current analytical method: Gas Chromatography; GC/FID
    method reference: 2 (OSHA In-House File)
    method classification: Not Validated

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