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Chemical Sampling Information (CSI)
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General Description

Synonyms: Carbomethene, Ethenone, Keto-ethylene

OSHA IMIS Code Number: 1574

Chemical Abstracts Service (CAS) Registry Number: 463-51-4

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: OA7700000; 45597

NIOSH Pocket Guide to Chemical Hazards, Ketene: chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:

colorless gas with a sharp odor
molecular weight: 42
boiling point: -69°F
melting point: -239°F

Incompatibilities: Water; a variety of organic compounds

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 0.5 ppm, 0.9 mg/m3

Construction Industry: 0.5 ppm, 0.9 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.5 ppm, 0.86 mg/m3 TWA; 1.5 ppm, 2.6 mg/m3 STEL

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.5 ppm TWA, 1.5 ppm STEL

Health Factors

Potential Symptoms: Eye, nose, throat, lung irritation; pulmonary edema

Health Effects: Lung edema (HE11) Irritation-Eyes, Nose, Throat, Lungs---Marked (HE14)

Affected Organs: Respiratory system, eyes, skin

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Midget Fritted Glass Bubbler (MFGB) containing 10 mL Alkaline Hydroxylammonium Chloride
    maximum volume: 50 Liters
    maximum flow rate: 1.0 L/min (TWA)
    maximum volume: 15 Liters
    maximum flow rate: 1.0 L/min (STEL)
    current analytical method: Colorimetric
    sampling and analytical error: 0.11
    method reference: 1 (NIOSH S-92)
    method classification: Fully Validated
    note: Absorbing solution: Equal volumes of 10% (w/v) hydroxylammonium chloride in water and 2.5 M sodium hydroxide are mixed. This mixture is stable for only 2 hours and should be prepared fresh just prior to use.

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