1,5-Diisocyanatonaphthalene

  • Naphthalene, 1,5-diisocyanate
  • Naphthalene diisocyanate
  • 1,5-Naphthylene diisocyanate
  • 1,5-Naphthyl diisocyanate
  • Isocyanic acid, 1,5-naphthylene ester
Formula C12H6N2O2
Structure
Description White to light-yellow crystalline flakes.

Registry Numbers and Inventories.
CAS 3173-72-6
EC (EINECS/ELINCS) 221-641-4
EC Index Number 615-007-00-X
EC Class Harmful; Irritant; Sensitising; Dangerous for the Environment
RTECS NQ9600000
RTECS class Tumorigen
UN (DOT) 2206
Beilstein/Gmelin 2212353
Beilstein Reference 4-13-00-00342
Swiss Giftliste 1 G-3604
Canada DSL/NDSL NDSL
US TSCA Listed
Austrailia AICS Listed
New Zealand Listed
Japan ENCS (MITI) Listed
Korea ECL Listed

Properties.
Formula C12H6N2O2
Formula mass 210.20
Melting point, °C 130 - 131
Boiling point, °C 220 - 221 (40 torr)
Vapor pressure, mmHg 0.003
Vapor density (air=1) 7.3
Density 1.462 g/cm3
Solubility in water Insoluble

Hazards and Protection.
Storage Store in a tightly closed container to prevent moisture contamination.
Handling Do not reseal if contamination is suspected. Avoid contact with skin and eyes. Do not breath aerosols/vapors.
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 A supplied=air respirator or a SCBA.
Small spills/leaks If material is molten, allow to solidify. Shovel into open containers. Flakes can be swept and placed into an open container..
Stability Stable at normal temperatures and pressures.
Incompatibilities Strong oxidizing agents.
Decomposition Oxides of carbon and nitrogen. Traces of HCN.

Fire.
Flash Point,°C 155
Fire fighting Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.

Health.
Exposure limit(s) NIOSH REL: TWA 0.040 mg/m3 (0.005 ppm) C 0.170 mg/m3 (0.020 ppm) 10-minute
Poison_Class 2
Exposure effects
   Ingestion See inhalation.
   Inhalation Symptoms: irritation eyes, nose, throat; respiratory sensitization, cough, pulmonary secretions, chest pain, dyspnea (breathing difficulty); asthma Target Organs: Eyes, respiratory system.
   Skin See inhalation.
   Eyes See inhalation.

First aid
 
   Ingestion Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
   Inhalation If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
   Skin Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.
   Eyes If symptoms develop, immediately move individual away from exposure and into fresh air. Flush eyes gently with water for at least 15 minutes while holding eyelids apart; seek immediate medical attention.

Transport.
UN number 2206
Response guide 155
Hazard class 6.1
Packing Group II; III