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
Hazard class
6.1
Packing Group
II; III