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 155
Hazard class 6.1
Packing Group II; III  
USCG Compatatibility Group 12. Isocyanates