ACETYLACETONE (2,4-PENTANEDIONE) | Occupational Safety and Health Administration

ACETYLACETONE (2,4-PENTANEDIONE)

Chemical Identification
Chemical Identification
CAS #	123-54-6
Formula	C₅H₈O₂
Synonyms	2,4-pentanedione; acetoacetone; diacetyl methane

Physical Properties
Physical Properties
Physical description	A colorless or yellow colored liquid.
Boiling point	284.7°F	Molecular weight	100.12
Freezing point/melting point	-10.3°F	Vapor pressure
Flash point	93°F	Vapor density
Specific gravity	0.975	Ionization potential
Lower explosive limit (LEL)	2.4%	Upper explosive limit (UEL)	11.6%
NFPA health rating		NFPA fire rating
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.)	A178
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	OSHA staff only, please contact SLTC at 801-233-4900
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	25 ppm [2010]	PEL-TWA
PEL-STEL		REL-STEL		TLV-STEL		PEL-STEL
PEL-C		REL-C		TLV-C		PEL-C
Skin notation	NA	Skin notation	NA	Skin notation	Y	Skin notation	NA
Notes: Not established		Notes: Not established		Notes:		Notes: Not established
Health factors: See NIH-NLM PubChem.		IDLH
Carcinogenic classifications:		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 - Pentane-2,4-dione NIOSH: Pocket Guide to Chemical Hazards - Pentane-2,4-dione Literature References ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - 2,4-Pentanedione. See annual publication for most recent information.

Last Updated Date : 12/15/2020