CHLOROACETALDEHYDE (2-CHLOROETHANAL)†

Chemical Identification
Chemical Identification
CAS # 107-20-0
Formula

C₂H₃ClO

Synonyms

chloroacetaldehyde (40% aqueous solution); 2-chloroacetaldehyde; 2-chloroethanal

Physical Properties
Physical Properties
Physical description Colorless liquid with an acrid, penetrating odor. Typically found as a 40% aqueous solution.
Boiling point 186°F Molecular weight 78.5
Freezing point/melting point 3°F (40% solution) Vapor pressure 100 mmHg
Flash point 190°F (40% solution) Vapor density 2.7
Specific gravity 1.19 (40% solution) Ionization potential 10.61 eV
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 3 NFPA fire rating 2
NFPA reactivity rating 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.) 0617
Sampling group
Sampler/Sampling media Silica gel tube (520/260 mg) [SKC 226-15]
Sampling time*
Sampling volume (TWA)*

7.5 L

Sampling flow rate (TWA)*

0.5 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-ECD
Method reference OSHA 76 (fully validated)
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
Model/Type
Sampling information
(see manufacturer instructions)
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 PEL-TWA
PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C

1 ppm (3 mg/m³)

REL-C

1 ppm (3 mg/m³)

TLV-C

1 ppm [1990]

PEL-C

1 ppm (3 mg/m³)

Skin notation

N

Skin notation

N

Skin notation

N

Skin notation

N

Notes:

See 29 CFR 1910.1000 Table Z-1.

Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH

45 ppm

Carcinogenic classifications: Not listed 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 - 2-Chloroethanal

NIOSH: Pocket Guide to Chemical Hazards - Chloroacetaldehyde

Literature References

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

Last Updated Date : 12/21/2020