Cyclooctadienes
HMT 15 June 2026Cyclooctadienes
1,5-Cyclooctadiene (also known as cycloocta-1,5-diene) is a cyclic hydrocarbon (a cycloalkene) with the chemical formula C8H12, specifically 2. There are three configurational isomers with this structure, that differ by the arrangement of the four C–C single bonds adjacent to the double bonds. Each pair of single bonds can be on the same side (cis,Z) or on opposite sides (trans,E) of the double bond's plane; the three possibilities are denoted cis,cis, trans,trans, and cis,trans; or (Z,Z), (E,E), and (Z,E). (Because of overall symmetry, trans,cis is the same configuration as cis,trans.) Generally abbreviated COD, the cis,cis isomer of this diene is a useful precursor to other organic compounds and serves as a ligand in organometallic chemistry Wikipedia
| Emergency Response Guide No. 130P |
Hazardous Materials Table
Source: 49 CFR §172 (15 June 2026)(3) Hazard class3Flammable liquids |
(4) Identification number |
(5) Packing Group |
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(6) Labels |
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(7) Special Provisions (§172.102)
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| B1 | |
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| IB3 | |
| T2 | |
| TP1 |
(8) Packing Authorizations (§173.***) 
| (8A) Exceptions | 150 | see 49 CFR §173.150 |
|---|---|---|
| (8B) Non-bulk | 203 | see 49 CFR §173.203 |
| (8C) Bulk | 242 | see 49 CFR §173.242 |
(9) Quantity Limits 
| (9A) Passenger aircraft/rail | 60 L |
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| (9B) Cargo aircraft only | 220 L |
(10) Vessel stowage 
| (10A) Location | |
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| (10B) Other | — |
Segregation chart for load, transport, and storage
This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.
| Hazard class | 8![]() | 7![]() | 6.1![]() | 5.2![]() | 5.1![]() | 4.3![]() | 4.2![]() | 4.1![]() | 3![]() | 2.3B![]() | 2.3A![]() | 2.2![]() | 2.1![]() | 1.6![]() | 1.5![]() | 1.4![]() | 1.3![]() | 1.1/1.2![]() |
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8 ![]() |
| Must not be loaded, transported, or stored together in the same vehicle or facility. | |
| May be loaded, transported, or stored together. | |
| May be loaded, transported, or stored together only with restrictions. |
Similar substances
| UN / ID | Proper shipping name | Hazard class |
|---|---|---|
| UN 2940 | 9-Phosphabicyclononanes or Cyclooctadiene phosphines | 4.2 |
| UN 2358 | Cyclooctatetraene | 3 |
