R

Retinol

IUPAC: (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraen-1-ol

C20H30O Organic Compounds CAS 68-26-8
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Quick Reference
Formula / NotationC20H30O
CAS Number68-26-8
Molecular Weight286.5
Melting Point144 to 147 °F (NTP, 1992)
Boiling Point279 to 280 °F at 1e-06 mmHg (NTP, 1992)
SolubilityPractically insoluble (NTP, 1992)
AppearanceVitamin a appears as yellow crystals or orange solid. Practically water insoluble. (NTP, 1992)
Also Known As(2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraen-1-ol; all-trans-Retinol; 68-26-8; trans-retinol; Veroftal; Agoncal; Bentavit A; Homagenets Aoral; Sehkraft A; Testavol S
CategoryOrganic Compounds

What is Retinol?

All-trans-retinol is a retinol in which all four exocyclic double bonds have E- (trans-) geometry. It has a role as a mouse metabolite, a plant metabolite and a human metabolite. It is a vitamin A and a retinol.

Formula & Notation

C20H30O

IUPAC Name: (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraen-1-ol

Other Names / Synonyms: (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraen-1-ol; all-trans-Retinol; 68-26-8; trans-retinol; Veroftal; Agoncal; Bentavit A; Homagenets Aoral; Sehkraft A; Testavol S

Properties & Characteristics

Appearance: Vitamin a appears as yellow crystals or orange solid. Practically water insoluble. (NTP, 1992). Molecular formula: C20H30O. Molecular weight: 286.5 g/mol. Boiling point: 279 to 280 °F at 1e-06 mmHg (NTP, 1992). Melting point: 144 to 147 °F (NTP, 1992). Solubility: Practically insoluble (NTP, 1992). Vapor pressure: 0.00000008 [mmHg]. LogP: 5.7.

Physical Data

PropertyValue
Melting Point144 to 147 °F (NTP, 1992)
Boiling Point279 to 280 °F at 1e-06 mmHg (NTP, 1992)
Molecular Weight286.5
SolubilityPractically insoluble (NTP, 1992)
AppearanceVitamin a appears as yellow crystals or orange solid. Practically water insoluble. (NTP, 1992)

Uses & Applications

Used as an industrial feedstock, solvent, pharmaceutical intermediate, flavoring agent, or chemical building block.

Safety Information

Flammable or irritant. Many organic compounds are flammable liquids or vapours. Keep away from ignition sources. Consult SDS for specific hazard data.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Retinol
Formula C20H30O
CAS Number 68-26-8
Molecular Weight 286.5
Category Organic Compounds
Index All "R" terms
Synonyms (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraen-1-ol; all-trans-Retinol; 68-26-8; trans-retinol; Veroftal; Agoncal; Bentavit A; Homagenets Aoral; Sehkraft A; Testavol S

Frequently Asked Questions

All-trans-retinol is a retinol in which all four exocyclic double bonds have E- (trans-) geometry. It has a role as a mouse metabolite, a plant metabolite and a human metabolite. It is a vitamin A and a retinol.

More "R" Terms

R-group R-group: variable side chain; amino acid: H₂N-CH(R)-COOH Radiation I = I₀·e^(−μx) Radical Radioactive Dating Radioactive Decay Rate = k × [A]^m (half-life: t½ = 0.693/k for first order) Radioactive Tracer Radioactivity Radioactivity A(Z,N) → decay products; λ = ln2/t₁/₂ Radium Ra Radon Rn Raoult's Law P_A = x_A × P°_A Raoult's Law
View all "R" terms →
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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.

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For educational purposes only. Verify all information before use.