N-NITROSODIMETHYLAMINE‡

Chemical Identification
CAS # 62-75-9
Formula

C₂H₆N₂O

Synonyms

dimethylnitrosamine; N,N-dimethylnitrosamine; DMNA; N-methyl-N-nitroso-methanamine; NDMA; N-nitroso-N,N-dimethylamine, nitrosodimethylamine

Physical Properties
Physical description Yellow, oily liquid with a faint characteristic odor.
Boiling point 306°F Molecular weight 74.1
Freezing point/melting point Vapor pressure 3 mmHg
Flash point 142°F Vapor density 2.56
Specific gravity 1.005 Ionization potential 8.69 eV
Lower explosive limit (LEL) Upper explosive limit (UEL)
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
Analyte code (IMIS no.) 1942
Sampling group
Sampler/Sampling media ThermoSorb/N air sampler [No longer available]
Sampling time*

75 min

Sampling volume (TWA)*

75 L

Sampling flow rate (TWA)*

1 L/min

Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-TEA
Method reference OSHA 27 (fully validated)
Notes
 

This media is no longer available. OSHA staff please contact the SLTC prior to sampling at (801) 233-5100.

Special requirements
 

Store samples in freezer.

* 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
Sampler/Sampling media
Bulk Method
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 REL-TWA TLV-TWA PEL-TWA
PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation
 

N

Skin notation
 

N

Skin notation
 

Y

Skin notation
 

N

Notes:
 

See 29 CFR 1910.1016, N-Nitrosodimethylamine (requirements identical to29 CFR 1910.1003, 13 Carcinogens).

Notes:
 

CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens.

Notes:
 

Exposure by all routes should be carefully controlled to levels as low as possible. [1992]

Notes:
 

See California Code of Regulations, Title 8, Section 5209. Carcinogens.

Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: IARC-2A, NIOSH-Ca, NTP-R, OSHA-Ca, TLV-A3, EPA-B2 Notes:
 

Ca

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Last Updated Date : 01/22/2024