Catalog No.S4177

For research use only.

Uracil is one of the four nucleobases in the nucleic acid of RNA can be used for drug delivery and as a pharmaceutical.

Uracil Chemical Structure

CAS No. 66-22-8

Purity & Quality Control

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Biological Activity

Description Uracil is one of the four nucleobases in the nucleic acid of RNA can be used for drug delivery and as a pharmaceutical.
In vitro

Uracil can be used for drug delivery and as a pharmaceutical. It can be reacted with elemental fluorine to produce 5-fluorouracil, which can inhibit RNA replication enzymes, eliminate RNA synthesis and stop the growth of cancerous cells. Uracil can also be used in the synthesis of caffeine. Uracil's use in the body is to help carry out the synthesis of many enzymes necessary for cell function through bonding with riboses and phosphates. Uracil serves as allosteric regulator and coenzyme for reactions in the human body and in plants. UMP controls the activity of carbamoyl phosphate synthetase and aspartate transcarbamoylase in plants, while UDP and UTP requlate CPSase II activity in animals. UDP-glucose regulates the conversion of glucose to galactose in the liver and other tissues in the process of carbohydrate metabolism. Uracil is also involved in the biosynthesis of polysaccharides and the transportation of sugars containing aldehydes.

Protocol (from reference)

Solubility (25°C)

In vitro

DMSO 22 mg/mL
(196.27 mM)
Ethanol 22 mg/mL
(196.27 mM)
Water Insoluble

In vivo

Add solvents to the product individually and in order
(Data is from Selleck tests instead of citations):
5% DMSO+corn oil
For best results, use promptly after mixing.


Chemical Information

Molecular Weight 112.09


CAS No. 66-22-8
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles C1=CNC(=O)NC1=O

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

mg/kg g μL

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO % % Tween 80 % ddH2O

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Molarity Calculator

Mass Concentration Volume Molecular Weight

Clinical Trial Information

NCT Number Recruitment Interventions Conditions Sponsor/Collaborators Start Date Phases
NCT04198727 Recruiting Other: DPD activity assessment|Drug: Capecitabine Breast Neoplasm Malignant Female Centre Antoine Lacassagne|Cerbaliance July 20 2020 Not Applicable
NCT04065204 Enrolling by invitation -- Pediatric Medulloblastoma Xinhua Hospital Shanghai Jiao Tong University School of Medicine June 1 2019 --

(data from https://clinicaltrials.gov, updated on 2022-01-17)

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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