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| Methylene bis(4-cyclohexylisocyanate) | CAS 5124-30-1 | ||
| CH2[(C6H10)NCO]2 | RTECS NQ9250000 | ||
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Synonyms & Trade Names Dicyclohexylmethane 4,4'-diisocyanate; DMDI; bis(4-Isocyanatocyclohexyl)methane; HMDI; Hydrogenated MDI; Reduced MDI; Saturated MDI |
DOT ID & Guide |
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Exposure Limits |
NIOSH REL: C 0.01 ppm (0.11 mg/m3) | ||
| OSHA PEL�: none | |||
| IDLH N.D. | Conversion 1 ppm = 10.73 mg/m3 | ||
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Physical Description Clear, colorless to light-yellow liquid. |
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MW: 262.4 |
BP: ? |
FRZ: <14°F |
Sol: Reacts |
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VP(77°F): 0.001 mmHg |
IP: ? |
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Sp.Gr(77°F): 1.07 |
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Fl.P: >395°F |
UEL: ? |
LEL: ? |
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| Class IIIB Combustible Liquid: Fl.P. at or above 200�F. | |||
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Incompatibilities & Reactivities Water, ethanol, alcohols, amines, bases, acids, organotin catalysts [Note: May slowly polymerize if heated above 122°F.] |
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Measurement Methods None available |
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Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation Provide: Quick drench |
First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately |
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Respirator Recommendations
NIOSH Up to 0.1 ppm: (APF = 10) Any supplied-air respirator* Up to 0.25 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode* Up to 0.5 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 |
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| Exposure Routes inhalation, ingestion, skin and/or eye contact | |
| Symptoms Irritation eyes, skin, respiratory system; skin, respiratory sensitization; chest tightness, dyspnea (breathing difficulty), cough, dry throat, wheezing, pulmonary edema; skin blisters | |
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Target Organs
Eyes, skin, respiratory system |
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| See also: INTRODUCTION |