METHYL METHACRYLATE | Occupational Safety and Health Administration

METHYL METHACRYLATE†

Chemical Identification
CAS #	80-62-6
Formula	C₅H₈O₂
Synonyms	methacrylate monomer; methyl ester of methacrylic acid; methyl methacrylate monomer; uninhibited; methyl-2-methyl-2-propenoate

Physical Properties
Physical description	Colorless liquid with an acrid, fruity odor.
Boiling point	214°F	Molecular weight	100.1
Freezing point/melting point	-54°F	Vapor pressure	29 mmHg
Flash point	50°F (open cup)	Vapor density	3.45
Specific gravity	0.94	Ionization potential	9.70 eV
Lower explosive limit (LEL)	1.7%	Upper explosive limit (UEL)	8.2%
NFPA health rating	2	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.)	1774
Sampling group
Sampler/Sampling media	CSC tube (100/50 mg) coated with 10% t-butylcatechol [SKC 226-73]
Sampling time^*	60 min
Sampling volume (TWA)^*	3 L
Sampling flow rate (TWA)^*	0.05 L/min
Sampling volume (STEL/Peak/C)^*	0.75 L
Sampling flow rate (STEL/Peak/C)^*	0.05 L/min
Analytical method instruments	GC-FID
Method reference	OSHA 94 (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	100 ppm (410 mg/m³)	REL-TWA	100 ppm (410 mg/m³)	TLV-TWA	50 ppm [1992]	PEL-TWA	50 ppm (205 mg/m³)
PEL-STEL		REL-STEL		TLV-STEL	100 ppm [1992]	PEL-STEL	100 ppm (410 mg/m³)
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: dermal sensitizer (DSEN)		Notes:
Health factors: See NIH-NLM PubChem.		IDLH	1000 ppm
Carcinogenic classifications: IARC-3, TLV-A4, EPA-NL; E		Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

NOAA: CAMEO Chemicals - Methyl methacrylate monomer

NIOSH: Pocket Guide to Chemical Hazards - Methyl methacrylate

Literature References

ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Methyl Methacrylate. See annual publication for most recent information.
California Occupational Safety & Health Standards Board: Initial and Final Statement of Reasons. July 6, 2006.
EPA: Integrated Risk Information System - Methyl Methacrylate (CASRN 80-62-6). March 2, 1998.
Fisher, A.A. and Baran, R.L.: Adverse reactions to acrylate sculptured nails with particular reference to prolonged paresthesia. Am. J. Contact Dermatitis 2(1): 38-42, 1991.
Freeman, S., Lee, M.-S. and Gudmundsen, K.: Adverse contact reactions to sculpted acrylic nails: 4 case reports and a literature review. Contact Dermatitis 33(6): 381-385, 1995.
Mizunuma, K., et al.: Biological monitoring and possible health effects in workers occupationally exposed to methyl methacrylate. Int. Arch. Occup. Environ. Health 65(4): 227-232, 1993.
NIOSH: Occupational Health Guideline for Methyl Methacrylate. September 1978.
Piirilä, P., et al.: Occupational respiratory hypersensitivity caused by preparations containing acrylates in dental personnel. Clin. Exp. Allergy 28(11): 1404-1411, 1998.

Last Updated Date : 01/05/2021

METHYL METHACRYLATE†

Chemical Identification

Physical Properties

Monitoring Methods Used by OSHA

Bulk/Wipe Method

On-Site Screening Techniques

Exposure Limits

Additional Resources and Literature References