Label abbreviations descriptions

CHLOROACETALDEHYDE (2-CHLOROETHANAL)†

Chemical Identification
CAS # 107-20-0
Formula

C₂H₃ClO
Synonyms

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

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
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.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)

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 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:

Visit the ACGIH TLV site for specific data

 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

Last Updated Date : 04/26/2024