Methylurea

  • 1-Methylurea
  • Monomethylurea
  • N-Methylurea
Formula
CH3NHCONH2
Structure
Description
White, crystalline needles.

Registry Numbers and Inventories.
CAS
598-50-5
EC (EINECS/ELINCS)
209-935-0
S 22 24/25
RTECS
YT7175000
RTECS class
Agricultural Chemical and Pesticide; Mutagen
Beilstein/Gmelin
878189
Beilstein Reference
4-04-00-00205
Swiss Giftliste 1
G-8932
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2H6N2O
Formula mass
74.08
Melting point, °C
98 - 102
Boiling point, °C
240
Vapor pressure, mmHg
0.2 (101 C)
Critical temperature
511
Critical pressure
63.9
Density
1.204 g/cm3
Solubility in water
1000 g/L
Partition coefficient, pKow
-1.05
Heat of fusion
15.90 kJ/mol
Heat of vaporization
71.4 kJ/mol
Heat of combustion
-1312 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate safety goggles, protective clothing and gloves.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Disposal code
3
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Keep away from strong oxidizing agents.

Fire.
Autoignition, °C
> 240
Fire fighting
Wear a self-contained breathing apparatus inpressure-demand, MSHA/NIOSH (approved or equivalent), and fullprotective gear. In case of fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
Hazards
During a fire, irritating and highly toxic gasesmay be generated by thermal decomposition or combustion.

Health.
Poison_Class
4
Exposure effects
   Ingestion
Harmful if swallowed. Danger of cumulative effects.

First aid
 
   Ingestion
Do NOT induce vomiting. Allow the victim to rinse his mouth and then to drink 2-4 cupfuls of water, and seek medical advice.
   Inhalation
Remove from exposure to fresh air immediately.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower lids.

Transport.
HS Code
2924 19 00