Methylene bis(4-cyclohexylisocyanate)

  • Dicyclohexylmethane 4,4'-diisocyanate
  • bis(4-Isocyanatocyclohexyl)methane
  • 4,4'-Methylenedicyclohexyl diisocyanate
Formula
C15H22N2O2
Structure
Description
Clear colorless to light-yellow liquid.

Registry Numbers and Inventories.
CAS
5124-30-1
EC (EINECS/ELINCS)
225-863-2
EC Index Number
615-009-00-0
EC Class
Toxic; Irritant; Sensitising
RTECS
NQ9250000
RTECS class
Primary Irritant
UN (DOT)
2206
Beilstein/Gmelin
2217800
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C15H22N2O2
Formula mass
262.39
Melting point, °C
19-23
Boiling point, °C
358
Vapor pressure, mmHg
0.001
Critical temperature
542
Critical pressure
17.7
Density
1.07 g/cm3 (20 C)
Solubility in water
Reacts

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
STORAGE PRECAUTIONS: You should store this material in a refrigerator.
Stability
May slowly polymerize if heated above 50 C.
Incompatibilities
Incompatible with many classes of compounds, reacting exothermically to release toxic gases Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat.

Fire.
Flash Point,°C
>110
Fire fighting
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher.
Fire potential
This material is probably combustible.

Health.
Exposure limit(s)
NIOSH REL: C 0.01 ppm (0.11 mg/m3)
Exposure effects
   Ingestion
See inhalation.
   Inhalation
Symptoms: irritation eyes, skin, respiratory system; skin, respiratory sensitization; chest tightness, dyspnea (breathing difficulty), cough, dry throat, wheezing, pulmonary edema; skin blisters Target Organs: Eyes, skin, respiratory system.
   Skin
See inhalation.
   Eyes
See inhalation.

First aid
 
   Ingestion
If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. MMEDIATELY transport the victim to a hospital.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
UN number
2206
Response guide
Hazard class
6.1
Packing Group
II; III