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CAS 73-31-4

CAS 73-31-4 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 73-31-4
CAS 73-31-4PubChem CID 896

Melatonin

Melatonin is a member of the class of acetamides that is acetamide in which one of the hydrogens attached to the nitrogen atom is replaced by a 2-(5-methoxy-1H-indol-3-yl)ethyl group. It is a hormone secreted by the pineal gland in humans. It has a role as a geroprotector, a hormone, a central nervous system depressant, an anticonvulsant, a radical scavenger, an immunological adjuvant, a mouse metabolite and a human metabolite. It is a member of acetamides and a member of tryptamines. It is functionally related to a tryptamine. — ChEBI

IUPAC name
N-[2-(5-methoxy-1H-indol-3-yl)ethyl]acetamide
Molecular formula
C13H16N2O2
Molecular weight
232.28 g/mol
Exact mass
232.121177757 Da
XLogP3
0.8
Topological polar surface area
54.1 Ų
Hydrogen-bond donors
2
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

MelatonineN-Acetyl-5-methoxytryptamineCircadin5-Methoxy-N-acetyltryptamineMelatolN-(2-(5-Methoxy-1H-indol-3-yl)ethyl)acetamideMelovineMelapure
16 more reported names
Acetamide, N-[2-(5-methoxy-1H-indol-3-yl)ethyl]-N-[2-(5-methoxyindol-3-yl)ethyl]acetamideN-acetyl-5-methoxy-tryptamineN-(2-(5-Methoxyindol-3-yl)ethyl)acetamideNSC 113928Acetamide, N-(2-(5-methoxyindol-3-yl)ethyl)-JL5DK93RCLAcetamide, N-(2-(5-methoxy-1H-indol-3-yl)ethyl)-NSC-564235-methoxy n-acetyl-tryptamineNSC-113928J5.258BBCI-049Acetamide, N-[2-(5-methoxyindol-3-yl)ethyl]-CHEBI:16796N-[2-(5-Methoxy-1H-indol-3-yl)ethyl)acetamide
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External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 73-31-4

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How CAS 73-31-4 is used on this site

CAS 73-31-4 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 73-31-4 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.