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CAS 66-22-8

CAS 66-22-8 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 66-22-8
CAS 66-22-8PubChem CID 1174

Uracil

Uracil is a common and naturally occurring pyrimidine nucleobase in which the pyrimidine ring is substituted with two oxo groups at positions 2 and 4. Found in RNA, it base pairs with adenine and replaces thymine during DNA transcription. It has a role as a prodrug, an allergen, a mouse metabolite, a Saccharomyces cerevisiae metabolite, an Escherichia coli metabolite, a human metabolite and a Daphnia magna metabolite. It is a pyrimidine nucleobase and a pyrimidone. It is a tautomer of a (4S)-4-hydroxy-3,4-dihydropyrimidin-2(1H)-one. — ChEBI

IUPAC name
1H-pyrimidine-2,4-dione
Molecular formula
C4H4N2O2
Molecular weight
112.09 g/mol
Exact mass
112.027277375 Da
XLogP3
-1.1
Topological polar surface area
58.2 Ų
Hydrogen-bond donors
2
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

pyrimidine-2,4(1H,3H)-dione2,4(1H,3H)-PyrimidinedionePyrodHybar XPirod2,4-Dioxopyrimidine2,4-Pyrimidinedione1,2,3,4-tetrahydropyrimidine-2,4-dione
16 more reported names
56HH86ZVCTNSC-3970SQ-6201SQ-7726SQ-8493CHEBI:17568BMS-205603-01NSC39702, 4-DioxopyrimidineRefChem:63382-hydroxy-4-(1H)-pyrimidione2-hydroxy-4-(3H)-pyrimidione4-hydroxy-2-(1H)-pyrimidione200-621-92,4-Dihydroxypyrimidinepyrimidine-2,4-diol
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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 66-22-8

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How CAS 66-22-8 is used on this site

CAS 66-22-8 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 66-22-8 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.