NIOSH Pocket Guide to Chemical Hazards

N-Nitrosodimethylamine CAS 62-75-9
(CH3)2N2O RTECS IQ0525000
Synonyms & Trade Names
Dimethylnitrosamine; N,N-Dimethylnitrosamine; DMNA; N-Methyl-N-nitroso-methanamine; NDMA; N-Nitroso-N,N-dimethylamine
DOT ID & Guide
NIOSH REL: Ca See Appendix A
OSHA PEL: [1910.1016] See Appendix B
IDLH Ca [N.D.] Conversion
Physical Description
Yellow, oily liquid with a faint, characteristic odor.
MW: 74.1
BP: 306°F
FRZ: ?
Sol: Soluble
VP: 3 mmHg
IP: 8.69 eV

Sp.Gr: 1.005
Fl.P: ?
UEL: ?
LEL: ?

Combustible Liquid
Incompatibilities & Reactivities
Strong oxidizers [Note: Should be stored in dark bottles.]
Measurement Methods
NIOSH 2522; OSHA 38
Personal Protection & Sanitation
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations NIOSH
At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape: (APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Nausea, vomiting, diarrhea, abdominal cramps; headache; fever; enlarged liver, jaundice; decreased liver, kidney, pulmonary function; [potential occupational carcinogen]
Target Organs Liver, kidneys,lungs

Cancer Site [in animals; lung, kidney, liver & nasal cavity tumors]