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CAS 65-71-4

CAS 65-71-4 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 65-71-4
CAS 65-71-4PubChem CID 1135

Thymine

Thymine is a pyrimidine nucleobase that is uracil in which the hydrogen at position 5 is replaced by a methyl group. It has a role as a mouse metabolite, an Escherichia coli metabolite and a human metabolite. It is a pyrimidine nucleobase and a pyrimidone. — ChEBI

IUPAC name
5-methyl-1H-pyrimidine-2,4-dione
Molecular formula
C5H6N2O2
Molecular weight
126.11 g/mol
Exact mass
126.042927438 Da
XLogP3
-0.6
Topological polar surface area
58.2 Ų
Hydrogen-bond donors
2
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

5-methyluracil2,4-Dihydroxy-5-methylpyrimidineThyminThymine anhydrate5-Methyl-1,2,3,4-tetrahydropyrimidine-2,4-dione2,4(1H,3H)-Pyrimidinedione, 5-methyl-Thymin (purine base)5-methyl-2,4(1H,3H)-pyrimidinedione
16 more reported names
QR26YLT7LTCHEBI:17821NSC-14705NSC-1686635 MethyluracilRefChem:6308200-616-15-methylpyrimidine-2,4(1H,3H)-dione5-Methyl UracilCCRIS 5584AI3-25479CHEMBL993THYMINE-13C1thymine-d42792-47-43059-73-2
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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 65-71-4

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How CAS 65-71-4 is used on this site

CAS 65-71-4 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 65-71-4 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.