2,3,7,8-Tetrachloro-dibenzo-p-dioxin |
Synonyms & Trade Names Dioxin; Dioxine; TCDBD; TCDD; 2,3,7,8-TCDD [Note: Formed during past production of 2,4,5-trichlorophenol, 2,4,5-T & 2(2,4,5-trichlorophenoxy)propionic acid.] |
CAS No. 1746-01-6 |
RTECS No. HP3500000 |
DOT ID & Guide |
FormulaC12H4Cl4O2 |
Conversion |
IDLH Ca [N.D.]
See: IDLH INDEX |
Exposure Limits NIOSH REL: Ca See Appendix A
OSHA PEL: none |
Measurement Methods
None available
See: NMAM or OSHA Methods |
Physical Description Colorless to white, crystalline solid. [Note: Exposure may occur through contact at previously contaminated worksites.] |
MW: 322.0 |
BP: Decomposes |
MLT: 581°F |
Sol: 0.00000002% |
VP(77°F): 0.000002 mmHg |
IP: ? |
Sp.Gr: ? |
Fl.P: ? |
UEL: ? |
LEL: ? |
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Incompatibilities & Reactivities UV light (decomposes) |
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact |
Symptoms irritation eyes; allergic dermatitis, chloracne; porphyria; gastrointestinal disturbance; possible reproductive, teratogenic effects; in animals: liver, kidney damage; hemorrhage; [potential occupational carcinogen] |
Target Organs Eyes, skin, liver, kidneys, reproductive system |
Cancer Site[in animals: tumors at many sites] |
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 flush 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 having an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 1467
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