DIACETONE ALCOHOL (4-HYDROXY-4-METHYL-2-PENTANONE)†

Chemical Identification
Chemical Identification
CAS # 123-42-2
Formula

C₆H₁₂O₂

Synonyms

diacetone; 4-hydroxy-4-methyl-2-pentanone; 2-methyl-2-pentanol-4-one

Physical Properties
Physical Properties
Physical description Colorless liquid with a faint, minty odor.
Boiling point 334°F Molecular weight 116.2
Freezing point/melting point -47°F Vapor pressure 1 mmHg
Flash point 125°F Vapor density
Specific gravity 0.94 Ionization potential
Lower explosive limit (LEL) 1.8% Upper explosive limit (UEL) 6.9%
NFPA health rating 1 NFPA fire rating 2
NFPA reactivity rating 0 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.) 0860
Sampling group
Sampler/Sampling media CSC tube (100/50 mg) [SKC 226-01]
Sampling time*
Sampling volume (TWA)*

1-10 L

Sampling flow rate (TWA)*

0.01-0.2 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-FID
Method reference NIOSH 1402 (partially 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

50 ppm (240 mg/m³)

REL-TWA

50 ppm (240 mg/m³)

TLV-TWA

50 ppm [1979]

PEL-TWA

50 ppm (240 mg/m³)

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

1800 ppm

Carcinogenic classifications: Not listed Notes:

10% of LEL

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Diacetone alcohol

NIOSH: Pocket Guide to Chemical Hazards - Diacetone alcohol

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Diacetone alcohol. See annual publication for most recent information.
  • Pohanish, R.P. (editor): Diacetone Alcohol. Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 758-759.

Last Updated Date : 12/22/2020