N-Nitrosodimethylamine

  • N-Methylnitrosamine
  • Dimethylnitrosamine
  • DMN
Formula
(CH3)2NNO
Structure
Description
Yellow oily liquid with a faint characteristic odor.
Uses
Industrial solvent, antioxidant, solvent in fiber & plastics industry, in lubricants, condensers to incr dielectric constant, has been used as nematocide, softener for copolymers. Former uses.

Registry Numbers and Inventories.
CAS
62-75-9
EC (EINECS/ELINCS)
200-549-8
EC Index Number
612-077-00-3
EC Class
Carcinogenic Category 2; Very toxic; Toxic; Dangerous for the Environment
RTECS
IQ0525000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Human Data
UN (DOT)
2810
Merck
12,6735
Beilstein/Gmelin
1738979
Beilstein Reference
4-04-00-03384
RCRA
P082
Swiss Giftliste 1
G-1562
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C2H6N2O
Formula mass
74.08
Melting point, °C
-28
Boiling point, °C
149
Vapor pressure, mmHg
4.6 (25 C)
Vapor density (air=1)
2.56
Density
1.0242 g/cm3 (0 C)
Solubility in water
Miscible
Surface tension
38.97 g/s2 (20 C)
Refractive index
1.4337 (18.4 C)
pKa/pKb
10.44 (pKb)
Partition coefficient, pKow
-0.57
Heat of vaporization
37.3 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from light.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not ingest or inhale. Store protected from light. Use only in a chemical fume hood. Discard contaminated shoes. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Wash area with soap and water. Cover with sand, dry lime or soda ash and place in a closed container for disposal. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation.
Stability
Stable under normal temperatures and pressures. May decompose on exposure to ultraviolet light.
Incompatibilities
Strong oxidizing agents.
Decomposition
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
36
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Water runoff can cause environmental damage. Dike and collect water used to fight fire. Use water spray to keep fire-exposed containers cool. Combustible Liquid. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use water spray to cool fire-exposed containers.
Fire potential
This chemical is combustible.
Hazards
When heated to decomposition, it emits toxic fumes of nitrogen oxides. Avoid exposure to ultraviolet light.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
2
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: Ca See Appendix A OSHA PEL: [1910.1016] See Appendix B
Carcinogin
O, G-A3, I-2A, N-2, CP65
Poison_Class
1*
Exposure effects
Prolonged or repeated exposure may cause changes in the esophagus, ulceration, and bleeding from the small or large intestine.
   Ingestion
May be fatal if swallowed. May cause headache, fever, nausea, abdominal pain, muscle pain and bloody urine. Causes enlarged liver and liver damage.
   Inhalation
Aspiration may lead to pulmonary edema. Inhalation at high concentrations may cause CNS depression and asphixiation.
   Skin
May cause irritation and dermatitis. May cause cyanosis of the extremities. Causes abdominal cramps and headache. May cause jaundice and reduced liver, kidney and lung function.
   Eyes
Causes eye irritation. May cause chemical conjunctivitis and corneal damage.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. Induce vomiting only when instructed to do so by a physician.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. Do not use mouth-to-mouth respiration if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2810
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
NDA