5-Iodo-1,3-dimethyluracil
5-Iodo-1,3-dimethyluracil (CAS 40738-83-8) is a halogenated heterocyclic compound with the molecular formula C6H7IN2O2. This white to off-white solid, with a molecular weight of 266.04, serves as a valuable building block in organic synthesis. It is particularly useful in the preparation of more complex pyrimidine derivatives and other heterocyclic structures for research and development purposes in medicinal chemistry and materials science. TSS supplies this chemical with a minimum assay of 99%.
- Synonyms
- C6H7IN2O25-Iodo-1,3-dimethyl-2,4(1H,3H)-pyrimidinedione

Organic Synthesis Intermediate
Utilised as a key intermediate in the synthesis of novel organic molecules. Its iodo-substituent allows for versatile functionalisation via cross-coupling reactions and other transformations, enabling the construction of complex molecular architectures.
Medicinal Chemistry Research
Serves as a foundational component in the development of new pharmaceutical candidates. Modifications of the uracil core can lead to compounds with potential biological activity, contributing to drug discovery efforts.
Heterocyclic Chemistry
A useful reagent for the study and synthesis of substituted pyrimidines and related heterocyclic systems. This contributes to advancing the understanding of heterocyclic chemistry and developing new synthetic methodologies.
| Molecular weight | 266.04 |
|---|---|
| Empirical formula | C6H7IN2O2 |
| Assay | 99% |
| Melting point | 225 °C (dec.)(lit.) |


Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H317May cause an allergic skin reaction
- H332Harmful if inhaled
- H334May cause allergy or asthma symptoms if inhaled
- H361Suspected of damaging fertility or the unborn child
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P342
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 63-20/21/22-42/43 |
| Safety statements (S) | 22-26-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 5-Iodo-1,3-dimethyluracil used for?
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5-Iodo-1,3-dimethyluracil is primarily used as a building block in organic synthesis, particularly in medicinal chemistry research for the preparation of novel heterocyclic compounds and potential pharmaceutical agents.
What is the CAS number and molecular formula for 5-Iodo-1,3-dimethyluracil?
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The CAS number is 40738-83-8, and the molecular formula is C6H7IN2O2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Iodo-1,3-dimethyluracil with a minimum assay of 99%. This product is suitable for research and chemical synthesis. It is not supplied as USP, BP, EP, or any pharmacopoeia grade.
How should 5-Iodo-1,3-dimethyluracil be handled safely?
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Due to its hazardous properties (Danger signal word; H302-H312-H317-H332-H334-H361 hazards), handle with appropriate personal protective equipment, including eyeshields, face shields, suitable gloves, and respiratory protection (type N100 or P3). Avoid inhalation of dust and contact with skin and eyes. Refer to the safety data sheet for comprehensive handling and emergency procedures.
How is 5-Iodo-1,3-dimethyluracil packed and shipped?
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5-Iodo-1,3-dimethyluracil is carefully packed to ensure safe transit and is exported globally by TSS in compliance with international shipping regulations for hazardous materials.
How can I request a sample or quote for 5-Iodo-1,3-dimethyluracil?
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To request a sample or a quote for 5-Iodo-1,3-dimethyluracil, please use the contact form on our website or email our sales department directly, providing your details and the product CAS number (40738-83-8).
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