![Molecular structure of 5H-dibenzo[a,d]cycloheptene (CAS 256-81-5)](/images/chem_structures_svg/303/256-81-5.svg)
5H-dibenzo[a,d]cycloheptene
Also known as: 11H-dibenzo[2,1-a:2',1'-e][7]annulene, 11H-dibenzo[2,1-a:2,1-e][7]annulene, 2,3:6,7-dibenzocyclohepta-2,4,6-triene, 5H-DIBENZO(A,D)CYCLOHEPTENE, 5H-Dibenzo(a,d)cycloheptene, 5H-Dibenzo<a,d>cyclohepten, 5H-Dibenzo[a,d][7]annulene, 5H-Dibenzo[a,d]cycloheptene, 5H-dibenzo[a,d][7]annulene, Cyproheptadine EP Impurity A, Cyproheptadine Hydrochloride EP IMpurity A, Cyproheptadine Related Compound A (40 mg) (5H-dibenzo[a,d]cycloheptene) (AS), Dibenzo[a,d]cycloheptatriene, Dibenzocycloheptatriene, Einecs 205-969-5, dibenzo<ad>cycloheptene, dibenzosuberene
5H-dibenzo[a,d]cycloheptene (CAS 256-81-5) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C15H12 and a molecular weight of 192.25600 g/mol. Key properties include a boiling point of 322.1ºC at 760mmHg, a density of 1.085g/cm3 and a flash point of 155.2ºC. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed and H413. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 256-81-5
- Jingsj CID
- J-1501671-4
- Molecular Formula
- C15H12
- Molecular Weight
- 192.25600 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 322.1ºC at 760mmHg |
|---|---|
| Density | 1.085g/cm3 |
| Flash Point | 155.2ºC |
| Exact Mass | 192.09400 |
| LogP | 3.76120 |
| Vapor Pressure | 0.000536mmHg at 25°C |
| Refractive Index | 1.625 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H413
Customs & Trade Information
| HS Code | 2902909090 |
|---|---|
| Summary | 2902909090 other aromatic hydrocarbons。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 5H-dibenzo[a,d]cycloheptene?
The CAS number of 5H-dibenzo[a,d]cycloheptene is 256-81-5.
What are the molecular formula and molecular weight of 5H-dibenzo[a,d]cycloheptene?
5H-dibenzo[a,d]cycloheptene has molecular formula C15H12 and molecular weight 192.25600 g/mol.
Is 5H-dibenzo[a,d]cycloheptene hazardous?
5H-dibenzo[a,d]cycloheptene has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H413.
What are the upstream and downstream products of 5H-dibenzo[a,d]cycloheptene?
For 5H-dibenzo[a,d]cycloheptene, Upstream Products: Dibenzosuberenone; Downstream Products: 5H-Dibenzo[a,d]cycloheptene,10,11-dihydro-, Anthracene,9,10-dihydro-, Anthracene.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5H-dibenzo[a,d]cycloheptene (CAS 256-81-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1501671-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.