Cyclopentadiene |
Synonyms & Trade Names 1,3-Cyclopentadiene |
CAS No. 542-92-7 |
RTECS No. GY1000000 |
DOT ID & Guide |
FormulaC5H6 |
Conversion 1 ppm = 2.70 mg/m3 |
IDLH 750 ppm
See: 542927 |
Exposure Limits NIOSH REL: TWA 75 ppm (200 mg/m3)
OSHA PEL: TWA 75 ppm (200 mg/m3) |
Measurement Methods
NIOSH 2523
See: NMAM or OSHA Methods |
Physical Description Colorless liquid with an irritating, terpene-like odor. |
MW: 66.1 |
BP: 107°F |
FRZ: -121°F |
Sol: Insoluble |
VP: 400 mmHg |
IP: 8.56 eV |
Sp.Gr: 0.80 |
Fl.P(oc): 77°F |
UEL: ? |
LEL: ? |
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| Class IC Flammable Liquid: Fl.P. at or above 73°F and below 100°F. |
Incompatibilities & Reactivities Strong oxidizers, fuming nitric acid, sulfuric acid [Note: Polymerizes to dicyclopentadiene upon standing.] |
Exposure Routes inhalation, ingestion, skin and/or eye contact |
Symptoms irritation eyes, nose |
Target Organs Eyes, respiratory system |
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Personal Protection/Sanitation (See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately |
Respirator Recommendations NIOSH/OSHA Up to 750 ppm:
(APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)
(APF = 10) Any supplied-air respirator
(APF = 50) Any self-contained breathing apparatus with a full facepiece 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: 0857
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