Retinal
All-trans-retinal is a retinal in which all four exocyclic double bonds have E- (trans-) geometry. It has a role as a gap junctional intercellular communication inhibitor, a mouse metabolite and a human metabolite. It is a vitamin A and a retinal. — ChEBI
- IUPAC name
- (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraenal
- Molecular formula
- C20H28O
- Molecular weight
- 284.4 g/mol
- Exact mass
- 284.214015512 Da
- XLogP3
- 6.2
- Topological polar surface area
- 17.1 Ų
- Hydrogen-bond donors
- 0
- Hydrogen-bond acceptors
- 1
- Covalent units
- 1
- Defined stereocentres
- 0
Also known as
16 more reported names
External database identifiers
- ChEBI:CHEBI:17898
- ChEMBL:CHEMBL81379
- EPA DTXSID:DTXSID5025998
- PubMed:12034887
- PubMed:9541407
- PubMed:6517562
- PubMed:228596
- PubMed:8539
Evidence from additional scientific databases
NIH PubChem PUG-View
Attributed physical-property, hazard, environmental and use annotations.
- Melting Point: 63 °C Source: Human Metabolome Database (HMDB)
- Physical Description: Solid Source: Human Metabolome Database (HMDB)
- Signal: Danger Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: H302 (28.6%): Harmful if swallowed [Warning Acute toxicity, oral]; H315 (29.3%): Causes skin irritation [Warning Skin corrosion/irritation]; H360 (72.1%): May damage fertility or the unborn child [Danger Reproductive toxicity]; H413 (72.1%): May cause long lasting harmful effects to aquatic life [Hazardous to the aquatic environment, long-term hazard] Source: European Chemicals Agency (ECHA)
- Precautionary Statement Codes: P203, P264, P270, P273, P280, P301+P317, P302+P352, P318, P321, P330, P332+P317, P362+P364, P405, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
- ECHA C&L Notifications Summary: Aggregated GHS information provided per 147 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record
Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.
Additional source coverage and match status
| Source | Result | Checked |
|---|---|---|
| NIH PubChem PUG-View | Exact match | 2026-08-31 |
A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.
Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.