A

Astaxanthin

IUPAC: (6S)-6-hydroxy-3-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-18-[(4S)-4-hydroxy-2,6,6-trimethyl-3-oxocyclohexen-1-yl]-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaenyl]-2,4,4-trimethylcyclohex-2-en-1-one

C40H52O4 Organic Compounds CAS 472-61-7
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Quick Reference
Formula / NotationC40H52O4
CAS Number472-61-7
Molecular Weight596.8
Melting Point182-183 °C
AppearanceSolid
Also Known As(6S)-6-hydroxy-3-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-18-[(4S)-4-hydroxy-2,6,6-trimethyl-3-oxocyclohexen-1-yl]-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaenyl]-2,4,4-trimethylcyclohex-2-en-1-one; 472-61-7; Ovoester; all-trans-Astaxanthin; BioAstin; AstaREAL; Astaxanthine; (3S,3'S)-Astaxanthin; Carophyll Pink; 8XPW32PR7I
CategoryOrganic Compounds

What is Astaxanthin?

Astaxanthin is a carotenone that consists of beta,beta-carotene-4,4'-dione bearing two hydroxy substituents at positions 3 and 3' (the 3S,3'S diastereomer). A carotenoid pigment found mainly in animals (crustaceans, echinoderms) but also occurring in plants. It can occur free (as a red pigment), as an ester, or as a blue, brown or green chromoprotein. It has a role as an antioxidant, an anticoagulant, an animal metabolite, a plant metabolite and a food colouring. It is a carotenol and a carotenone. It derives from a hydride of a beta-carotene.

Formula & Notation

C40H52O4

IUPAC Name: (6S)-6-hydroxy-3-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-18-[(4S)-4-hydroxy-2,6,6-trimethyl-3-oxocyclohexen-1-yl]-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaenyl]-2,4,4-trimethylcyclohex-2-en-1-one

Other Names / Synonyms: (6S)-6-hydroxy-3-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-18-[(4S)-4-hydroxy-2,6,6-trimethyl-3-oxocyclohexen-1-yl]-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaenyl]-2,4,4-trimethylcyclohex-2-en-1-one; 472-61-7; Ovoester; all-trans-Astaxanthin; BioAstin; AstaREAL; Astaxanthine; (3S,3'S)-Astaxanthin; Carophyll Pink; 8XPW32PR7I

Properties & Characteristics

Appearance: Solid. Molecular formula: C40H52O4. Molecular weight: 596.8 g/mol. Melting point: 182-183 °C. LogP: 10.3.

Physical Data

PropertyValue
Melting Point182-183 °C
Molecular Weight596.8
AppearanceSolid

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 Astaxanthin
Formula C40H52O4
CAS Number 472-61-7
Molecular Weight 596.8
Synonyms (6S)-6-hydroxy-3-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-18-[(4S)-4-hydroxy-2,6,6-trimethyl-3-oxocyclohexen-1-yl]-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaenyl]-2,4,4-trimethylcyclohex-2-en-1-one; 472-61-7; Ovoester; all-trans-Astaxanthin; BioAstin; AstaREAL; Astaxanthine; (3S,3'S)-Astaxanthin; Carophyll Pink; 8XPW32PR7I

Frequently Asked Questions

Astaxanthin is a carotenone that consists of beta,beta-carotene-4,4'-dione bearing two hydroxy substituents at positions 3 and 3' (the 3S,3'S diastereomer). A carotenoid pigment found mainly in animals (crustaceans, echinoderms) but also occurring in plants. It can occur free (as a red pigment), as an ester, or as a blue, brown or green chromoprotein. It has a role as an antioxidant, an anticoagulant, an animal metabolite, a plant metabolite and a food colouring. It is a carotenol and a carotenone. It derives from a hydride of a beta-carotene.

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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.