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NAPHTHALENE 1,5-DIISOCYANATEICSC: 0653
1,5-Diisocyanatonaphthalene
NDI
November 1998
CAS #: 3173-72-6
EC Number: 221-641-4

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. Gives off irritating or toxic fumes (or gases) in a fire.    NO open flames.    Use foam, powder, carbon dioxide. NO water.   

 PREVENT DISPERSION OF DUST! STRICT HYGIENE!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Laboured breathing. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness. Pain.  Protective gloves.  Remove contaminated clothes. Rinse skin with plenty of water or shower. 
Eyes Redness. Pain.  Wear safety spectacles or eye protection in combination with breathing protection if powder.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal pain. Sore throat.  Do not eat, drink, or smoke during work.  Rinse mouth. Give one or two glasses of water to drink. Rest. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Sweep spilled substance into covered sealable containers. Carefully collect remainder. Then store and dispose of according to local regulations. Do NOT let this chemical enter the environment. Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. 

According to UN GHS Criteria

 

Transportation
UN Classification
 

STORAGE
See Chemical Dangers. Well closed. 
PACKAGING
Do not transport with food and feedstuffs. 
NAPHTHALENE 1,5-DIISOCYANATE ICSC: 0653
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
WHITE-TO-LIGHT-YELLOW CRYSTALS. 

Physical dangers
 

Chemical dangers
Decomposes on heating. This produces toxic fumes of nitrogen oxides, carbon monoxide, isocyanates and hydrogen cyanide. Reacts with acids, alcohols, amines, bases, strong oxidants, strong reducing agents and water. 

Formula: C12H6O2N2 / C10H6(NCO)2
Molecular mass: 210.19
Boiling point at 0.7kPa: 167°C
Melting point: 130°C
Relative density (water = 1): 1.42
Vapour pressure, Pa at 20°C: <0.001
Flash point: 192°C c.c. 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed, especially if powdered. 

Effects of long-term or repeated exposure
Repeated or prolonged inhalation may cause asthma. 


OCCUPATIONAL EXPOSURE LIMITS
MAK: carcinogen category: 3B; sensitization of respiratory tract (SA) 

ENVIRONMENT
The substance is harmful to aquatic organisms. 

NOTES
Reacts violently with fire extinguishing agents such as water (above 50°C).
The symptoms of asthma often do not become manifest until a few hours have passed and they are aggravated by physical effort.
Rest and medical observation are therefore essential.
Anyone who has shown symptoms of asthma due to this substance should avoid all further contact.
Do NOT take working clothes home. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: Xn; R: 20-36/37/38-42-52/53; S: (2)-26-28-38-45-61 

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    See Also:
       Toxicological Abbreviations