Toluene-2,4-diisocyanate |
Synonyms & Trade Names TDI; 2,4-TDI; 2,4-Toluene diisocyanate |
CAS No. 584-84-9 |
RTECS No. CZ6300000 |
DOT ID & Guide 2078 156 |
FormulaCH3C6H3(NCO)2 |
Conversion 1 ppm = 7.13 mg/m3 |
IDLH Ca [2.5 ppm]
See: 584849 |
Exposure Limits NIOSH REL: Ca See Appendix A
OSHA PEL†: C 0.02 ppm (0.14 mg/m3) |
Measurement Methods
NIOSH 2535 , 5521 , 5522 , 5525;
OSHA 18 , 33 , 42
See: NMAM or OSHA Methods |
Physical Description Colorless to pale-yellow solid or liquid (above 71°F) with a sharp, pungent odor. |
MW: 174.2 |
BP: 484°F |
MLT: 71°F |
Sol: Insoluble |
VP(77°F): 0.01 mmHg |
IP: ? |
Sp.Gr: 1.22 |
Fl.P: 260°F |
UEL: 9.5% |
LEL: 0.9% |
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| Class IIIB Combustible Liquid: Fl.P. at or above 200°F. |
Incompatibilities & Reactivities Strong oxidizers, water, acids, bases & amines (may cause foam & spatter); alcohols [Note: Reacts slowly with water to form carbon dioxide and polyureas.] |
Exposure Routes inhalation, ingestion, skin and/or eye contact |
Symptoms irritation eyes, skin, nose, throat; choke, paroxysmal cough; chest pain, retrosternal (occurring behind the sternum) soreness; nausea, vomiting, abdominal pain; bronchitis, bronchospasm, pulmonary edema; dyspnea (breathing difficulty), asthma; conjunctivitis, lacrimation (discharge of tears); dermatitis, skin sensitization; [potential occupational carcinogen] |
Target Organs Eyes, skin, respiratory system |
Cancer Site[in animals: pancreas, liver, mammary gland, circulatory sys & skin tumors] |
Personal Protection/Sanitation (See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench |
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately |
Respirator Recommendations NIOSH At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(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: 0339 See MEDICAL TESTS: 0233 |
