Hexamethylene diisocyanate
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CAS
822-06-0
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OCN[CH2]6NCO
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RTECS
MO1740000
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Synonyms & Trade Names
1,6-Diisocyanatohexane; HDI; Hexamethylene-1,6-diisocyanate; 1,6-Hexamethylene diisocyanate; HMDI
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DOT ID & Guide
2281 / 156
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Exposure
Limits
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NIOSH REL: TWA 0.005 ppm (0.035 mg/m3) C 0.020 ppm (0.140 mg/m3) [10-minute]
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OSHA PEL: none
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IDLH
N.D.
See: IDLH INDEX
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Conversion
1 ppm = 6.88 mg/m3
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Physical Description
Clear, colorless to slightly yellow liquid with a sharp, pungent odor.
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MW: 168.2
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BP: 415°F
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FRZ: -89°F
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Sol: Low (Reacts)
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VP(77°F): 0.5 mmHg
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IP:?
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Sp.Gr(77°F): 1.04
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Fl.P: 284°F
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UEL: ?
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LEL: ?
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Class IIIB Combustible Liquid: Fl.P. at or above 200°F.
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Incompatibilities & Reactivities
Water, alcohols, strong bases, amines, carboxylic acids, organotin catalysts [Note: Reacts slowly with water to form carbon dioxide. Avoid heating above 392°F (polymerizes).]
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Measurement Methods
NIOSH 5521, 5522, 5525; OSHA 42
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation
Provide: Eyewash, Quick drench
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
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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
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Exposure Routes
inhalation, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, skin, respiratory system; cough, dyspnea (breathing difficulty), bronchitis, wheezing, pulmonary edema, asthma; corneal damage, skin blisters
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Target Organs
Eyes, skin, respiratory system
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See also: INTRODUCTION
See ICSC CARD: 0278 |
