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NIOSH

NAPHTHALENE 1,5-DIISOCYANATE

ICSC: 0653

1,5-Diisocyanatonaphthalene
NDI
C12H6O2N2 / C10H6(NCO)2
Molecular mass: 210.19
ICSC # 0653 		CAS # 3173-72-6
RTECS # NQ9600000
EC # 615-007-00-X
November 26, 1998 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Foam, powder, carbon dioxide. NO water.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE!

•INHALATION Cough. Laboured breathing. Sore throat.
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.
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 take to a doctor.
•INGESTION Abdominal pain. Sore throat.
Do not eat, drink, or smoke during work.
Rinse mouth. Give plenty of water to drink. Rest. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Sweep spilled substance into sealable containers. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment. Personal protection: P2 filter respirator for harmful particles.
See Chemical Dangers. Well closed.
Do not transport with food and feedstuffs.
Xn symbol
R: 20-36/37/38-42-52/53
S: 2-26-28-38-45-61
ICSC: 0653 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

NAPHTHALENE 1,5-DIISOCYANATE

ICSC: 0653

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A

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D

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A

PHYSICAL STATE; APPEARANCE:
WHITE TO LIGHT YELLOW CRYSTALS

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating producing toxic fumes (nitrogen oxides, carbon monoxide, isocyanate vapours, traces of hydrogen cyanide). Reacts with acids , alcohols , amines , bases , strong oxidants , strong reducing agents , water .

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK: sensitization of respiratory tract (Sa);
Carcinogen category: 3B;
(DFG 2005).
OSHA PEL: none
NIOSH REL: TWA 0.040 mg/m3 (0.005 ppm) C 0.170 mg/m3 (0.020 ppm) 10-minute
NIOSH IDLH: N.D. See: IDLH INDEX


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

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 SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged inhalation exposure may cause asthma.

PHYSICAL
PROPERTIES

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.

ENVIRONMENTAL
DATA

The substance is harmful to aquatic organisms.

N O T E S

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. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, EU classification.

ADDITIONAL INFORMATION



ICSC: 0653 NAPHTHALENE 1,5-DIISOCYANATE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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