Skip to product details

Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Uracil | CAS 66-22-8

The pyrimidinedione base of RNA, used in defined culture-medium formulations and nucleobase chemistry, with procurement criteria determined by the intended biological or synthetic system.

CAS66-22-8
Molecular formulaC4H4N2O2
Molecular weight112.09 g/mol

Product overview

Uracil contains two carbonyl groups on a pyrimidine ring and lacks the sugar present in uridine. Its nucleobase identity is relevant both to biological media and to synthesis of substituted pyrimidines. A purchase specification should distinguish chemical assay from the performance needed in a particular culture system and define how solutions will be prepared.

Chemical identity

Chemical name
Uracil
CAS number
66-22-8
Molecular formula
C4H4N2O2
Molecular weight
112.09 g/mol

Application context

Uracil is used as a supplement in defined yeast media, including synthetic complete formulations. Its role depends on strain requirements and the composition of the medium. For culture evaluation, describe the organism, solution conditions and the need for microbial or other biological quality controls. Synthetic projects instead focus on the unmodified pyrimidinedione structure and related nucleobases that could carry into subsequent derivatives.

Chemistry and synthetic role

Two ring nitrogen atoms and the 2,4-dione pattern define uracil; glycosylation gives a nucleoside with a separate identity.

Quality review

Distinguish nucleobase from nucleoside

Confirm uracil rather than uridine or a nucleotide.

Resolve related pyrimidines

Agree chromatographic separation of related bases relevant to the process.

Qualify the intended solution

Define solvent, pH and clarity conditions; add biological acceptance tests when used in media.

Preparing a specification

Specify free uracil, assay and pyrimidine impurity method. For media, add solution conditions and the biological acceptance criteria required by the culture.

Packaging and storage

Confirm container compatibility, closure and net weight for the selected grade and destination. Follow the actual supplier SDS and batch label for storage and transport.

Documentation

Request the batch COA, SDS and analytical methods covering the agreed purchasing specification. Confirm which supporting chromatograms and application-specific records are available from the selected manufacturer.

Procurement questions

Is uracil the same as uridine?

No. Uridine contains ribose; uracil is the free base.

What matters for yeast media?

Specify strain, medium formulation and required biological quality controls.

How should solution clarity be specified?

State concentration, solvent and pH so results can be compared.

Technical sources
  1. PubChem CAS identity lookupNCBI / PubChem
  2. Uracil U1128Sigma-Aldrich
  3. Uracil U0013TCI