DIMETHYLPHTHALATE | Occupational Safety and Health Administration

DIMETHYLPHTHALATE†

Chemical Identification
CAS #	131-11-3
Formula	C₁₀H₁₀O₄
Synonyms	dimethyl ester of 1,2-benzenedicarboxylic acid; DMP; phthalic acid; dimethyl ester

Physical Properties
Physical description	Colorless, oily liquid with a slight, aromatic odor.
Boiling point	543°F	Molecular weight	194.2
Freezing point/melting point	32°F	Vapor pressure	0.01 mmHg
Flash point	295°F	Vapor density	6.69
Specific gravity	1.19	Ionization potential	9.64 eV
Lower explosive limit (LEL)	0.9% at 358°F	Upper explosive limit (UEL)	8%
NFPA health rating	1	NFPA fire rating	1
NFPA reactivity rating	0	NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.)	0950
Sampling group
Sampler/Sampling media	OSHA versatile sampler (OVS-Tenax®) - 13 mm Tenax® tube (140/70 mg) with GFF enclosed [SKC 226-56]
Sampling time^*	240 min
Sampling volume (TWA)^*	240 L
Sampling flow rate (TWA)^*	1 L/min
Sampling volume (STEL/Peak/C)^*	15 L
Sampling flow rate (STEL/Peak/C)^*	1 L/min
Analytical method instruments	GC-FID
Method reference	OSHA 104 (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	5 mg/m³	REL-TWA	5 mg/m³	TLV-TWA	5 mg/m³ [2005]	PEL-TWA	5 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	2000 mg/m³
Carcinogenic classifications: EPA-D		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Dimethyl phthalate

NIOSH: Pocket Guide to Chemical Hazards - Dimethylphthalate

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Dimethyl phthalate. See annual publication for most recent information.
EPA Air Toxics Website: Dimethyl Phthalate. U.S. Environmental Protection Agency Technology Transfer Network.
Albro, P.W. and Moore, B.: Identification of the metabolites of simple phthalate diesters in rat urine. J. Chromatogr. 94(0): 209-218, 1974.
Field, E.A., et al.: Developmental toxicity evaluation of diethyl and dimethyl phthalate in rats. Teratology 48(1): 33-44, 1993.
Pohanish, R.P. (editor): Dimethyl Phthalate. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 936-939.
Scott, R.C., Dugard, P.H., Ramsey, J.D. and Rhodes, C.: In vitro absorption of some o-phthalate diesters through human and rat skin. Environ. Health Perspect. 74: 223-227, 1987.

Last Updated Date : 12/28/2020

DIMETHYLPHTHALATE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References