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Naphthalene diisocyanate

Synonyms & Trade Names
1,5-Diisocyanatonaphthalene; 1,5-Naphthalene diisocyanate; 1,5-Naphthalene ester of isocyanic acid; NDI
CAS No.
3173-72-6
RTECS No.
NQ9600000
DOT ID & Guide
Formula
C10H6(NCO)2
Conversion
1 ppm = 8.60 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
: TWA 0.040 mg/m3 (0.005 ppm) C 0.170 mg/m3 (0.020 ppm) [10-minute]
OSHA PEL
: none
Measurement Methods

NIOSH 5525;
OSHA PV2046
See: NMAM or OSHA Methods
Physical Description
White to light-yellow, crystalline flakes.
MW:
210.2
BP:
505°F		 MLT: 261°F
Sol:
?		 VP(75°F): 0.003 mmHg
IP:
?
Sp.Gr:
?		 Fl.P(oc): 311°F
UEL:
?
LEL:
?
Combustible Solid
Incompatibilities & Reactivities
None reported
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, nose, throat; resp sensitization, cough, pulmonary secretions, chest pain, dyspnea (breathing difficulty); asthma
Target Organs
Eyes, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations

NIOSH

Up to 0.05 ppm:
(APF = 10) Any supplied-air respirator*

Up to 0.125 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode*

Up to 0.25 ppm:
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

Up to 1 ppm:
(APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode

Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0653
 

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