| Melting point: |
-85°; mp 32.5° |
| Boiling point: |
bp760 41.5-42.0° |
| Density |
d40 0.8235; d410 0.8131; d420 0.8021; d425 0.7966; d430 0.7914 |
| vapor pressure |
381 at 20.6 °C, 735 at 40.6 °C, 1,380 at 60.9 °C (Stoeck and Roscher, 1977) |
| refractive index |
nD16 1.44632 |
| solubility |
Miscible with acetone, benzene, carbon tetrachloride, and ether. Soluble in acetic acid, aniline, and
carbon disulfide (Windholz et al., 1983). |
| form |
Colorless liquid |
| pka |
16(at 25℃) |
| Water Solubility |
10.3 mM at 25 °C (shake flask-UV spectrophotometry, Streitwieser and Nebenzahl, 1976) |
| Henry's Law Constant |
5.1 at 25 °C (approximate - calculated from water solubility and vapor pressure) |
| Exposure limits |
TLV-TWA 75 ppm (～202 mg/m3) (ACGIH,
NIOSH, and OSHA); IDLH 2000 ppm
(NIOSH). |
| Stability: |
Stable at room temperature. Incompatible with oxidizing agents, acids and a wide variety of other compounds. May form peroxides in storage. May undergo spontaneous polymerisation. Decomposes on heating. Highly flammable. Mixtures with air are explosive. |
| EPA Substance Registry System |
Cyclopentadiene (542-92-7) |