- Naphthalene, 1,5-diisocyanate
- Naphthalene diisocyanate
- 1,5-Naphthylene diisocyanate
- 1,5-Naphthyl diisocyanate
- Isocyanic acid, 1,5-naphthylene ester
White to light-yellow crystalline flakes.
Registry Numbers and Inventories.
EC Index Number
Harmful; Irritant; Sensitising; Dangerous for the Environment
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
130 - 131
Boiling point, °C
220 - 221 (40 torr)
Vapor pressure, mmHg
Vapor density (air=1)
Solubility in water
Hazards and Protection.
Store in a tightly closed container to prevent moisture contamination.
Do not reseal if contamination is suspected. Avoid contact with skin and eyes. Do not breath aerosols/vapors.
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.
A supplied=air respirator or a SCBA.
If material is molten, allow to solidify. Shovel into open containers. Flakes can be swept and placed into an open container..
Stable at normal temperatures and pressures.
Strong oxidizing agents.
Oxides of carbon and nitrogen. Traces of HCN.
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.
NIOSH REL: TWA 0.040 mg/m3 (0.005 ppm) C 0.170 mg/m3 (0.020 ppm) 10-minute
Symptoms: irritation eyes, nose, throat; respiratory sensitization, cough, pulmonary secretions, chest pain, dyspnea (breathing difficulty); asthma Target Organs: Eyes, respiratory system.
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.
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.
Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.
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.