Label abbreviations descriptions

CROTONALDEHYDE†

Chemical Identification
CAS # 4170-30-3
Formula

C₄H₆O
Synonyms

2-butenal; crotonaldehyde, inhibited; β-methyl acrolein; propylene aldehyde

Physical Properties
Physical description Colorless to straw-colored liquid with a suffocating odor.
Boiling point 219°F Molecular weight 70.1
Freezing point/melting point -101°F Vapor pressure 19 mmHg
Flash point 55°F Vapor density 2.41
Specific gravity 0.87 Ionization potential 9.73 eV
Lower explosive limit (LEL) 2.95% Upper explosive limit (UEL) 15.5%
NFPA health rating 4 NFPA fire rating 3
NFPA reactivity rating 2 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0770
Sampling group
Sampler/Sampling media 2 GFFs (open-faced) in 1 cassette separated by a spacer. GFFs are coated with 2,4-dinitrophenylhydrazine (DNPH) and phosphoric acid. [SKC 225-9019]
Sampling time*

60 min
Sampling volume (TWA)*

6 L
Sampling flow rate (TWA)*

0.1 L/min
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments HPLC
Method reference OSHA 81 (fully validated)
Notes

Collect the sample open-faced, protect samples from light and heat.
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

2 ppm (6 mg/m³)

 REL-TWA

2 ppm (6 mg/m³)

 TLV-TWA PEL-TWA
PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C

0.3 ppm [1995]

 PEL-C

0.3 ppm
Skin notation

N

 Skin notation

N

 Skin notation

Y

 Skin notation

Y
Notes:

See 29 CFR 1910.1000 Table Z-1.

 Notes:

See Appendix C, Supplementary Exposure Limits

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

50 ppm
Carcinogenic classifications: IARC-3, TLV-A3, EPA-C Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

0.2 ppm/5 ppm/15 ppm

Additional Resources and Literature References

Last Updated Date : 12/22/2020