ETHYLENE

Chemical Identification
Chemical Identification
CAS # 74-85-1
Formula

C₂H₄

Synonyms

ethene; acetene

Physical Properties
Physical Properties
Physical description Colorless gas with a sweet odor.
Boiling point -154.7°F Molecular weight 28.05
Freezing point/melting point -272.4°F Vapor pressure
Flash point -213°F (approx) Vapor density
Specific gravity 0.569 at -154.84°F Ionization potential
Lower explosive limit (LEL) 2.75% Upper explosive limit (UEL) 28.6%
NFPA health rating 2 NFPA fire rating 4
NFPA reactivity rating 2 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.)
Sampling group
Sampler/Sampling media
Sampling time*
Sampling volume (TWA)*
Sampling flow rate (TWA)*
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments
Method reference
Notes
Special requirements

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Wipe Method
Wipe Method
Sampler/Sampling media
Bulk Method
Bulk Method
On-Site Screening Techniques
On-Site Screening Techniques
Device Detector tube Detector tube Detector tubes Detector tube Detector tube
Model/Type Dräger - Ethylene 0.1/a, 8101331 Dräger - Ethylene 50/a, 6728051 Gastec 172L, 172, 171 Matheson-Kitagawa 8014-108SA Matheson-Kitagawa 8014-280S
Sampling information
(see manufacturer instructions)
20 strokes, approx 0.2-5 ppm range; uncertainty 49% 3 strokes, approx 50-2500 ppm range, uncertainty 32% 172L: 1 stroke, 5-800 ppm range, uncertainty 16% for 25-200 ppm, 8% for 200-800 ppm. 172: 1 stroke, 5-800 ppm range, uncertainty 16% for 25-200 ppm, 8% for 200-800 ppm. 171: 1 stroke, 0.1-2% range. 103: 0.5-2 strokes, 0.35-16.8% range follow mfr instructions, approx 20-1200 ppm range follow mfr instructions, approx 20-2000 ppm range
Exposure Limits
Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA
 

 

REL-TWA
 

 

TLV-TWA
 

200 ppm [2001]

PEL-TWA
 

 

PEL-STEL
 

 

REL-STEL
 

 

TLV-STEL
 

 

PEL-STEL
 

 

PEL-C
 

 

REL-C
 

 

TLV-C
 

 

PEL-C
 

 

Skin notation
 

N

Skin notation
 

NA

Skin notation
 

N

Skin notation
 

N

Notes:
 

Ethylene is classified as a simple asphyxiant and exposure is addressed in OSHA Construction and Maritime standards only. For OSHA's construction regulations, see 29 CFR 1926.55 Appendix A, [E]: The limiting factor is the available oxygen which shall be at least 19.5% and be within the requirements addressing explosion in 29 CFR 1926, Subpart AA. For OSHA's maritime regulations, see 29 CFR 1915.1000 Table Z-Shipyards, [E]: The limiting factor is the available oxygen which shall be at least 18% and be within the requirements addressing explosion in 29 CFR 1915, Subpart B.

Notes:
 

Not established

Notes:
 

 

Notes:
 

See footnote [h]: A number of gases and vapors, when present in high concentrations, act primarily as asphyxiants without other adverse effects. A concentration limit is not included for each material because the limiting factor is the available oxygen. (Several of these materials present fire or explosion hazards.)

Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: TLV-A4 Notes:
 

 

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 

 

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Ethylene

NIOSH: Pocket Guide to Chemical Hazards - Not listed

Literature References

 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Ethylene. See annual publication for most recent information.

Last Updated Date : 01/31/2018