1,1-Dimethyl-2-selenourea
1,1-Dimethyl-2-selenourea (CAS: 5117-16-8) is an organic selenium compound with the linear formula (CH3)2NC(Se)NH2 and a molecular weight of 151.07 g/mol. This chemical is primarily utilised as a precursor in specialised synthesis, particularly for the development of semiconductor nanocrystals like CdSe quantum dots. Supplied with an assay of 97%, it is suitable for research and chemical synthesis applications.
- Synonyms
- (CH3)2NC(Se)NH2

Synthesis of Quantum Dots
1,1-Dimethyl-2-selenourea serves as a key precursor for synthesising cadmium selenide (CdSe) quantum dots. Research indicates its use in aqueous solution under specific laser and lamp illumination conditions for quantum dot formation.
Organic Synthesis Building Block
As a functionalised selenium-containing organic molecule, it can be employed as a building block in complex organic synthesis pathways. Its structure allows for the introduction of selenium into various molecular frameworks.
Material Science Research
This compound is relevant in material science for the development of novel selenium-based materials and nanostructures. Its specific chemical properties make it a candidate for exploring advanced material applications.
| Molecular weight | 151.07 |
|---|---|
| Linear formula | (CH3)2NC(Se)NH2 |
| Assay | 97% |
| Storage temperature | 2-8°C |
| Application | 1,1-Dimethyl-2-selenourea was used as precursor to synthesize CdSe quantum dots in aqueous solution under simultaneous illumination with a diode-pumped solid state green laser and a Xe-Hg lamp1. |
| Melting point | 172-174 °C(lit.) |



Hazard statements
- H301Toxic if swallowed
- H331Toxic if inhaled
- H373May cause damage to organs through prolonged exposure
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P273Avoid release to the environment
- P301IF SWALLOWED
- P311Call a POISON CENTER or doctor
- P501Dispose of contents and container per local regulations
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3283 6.1 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T,N |
| Risk statements (R) | 23/25-33-50/53 |
| Safety statements (S) | 20/21-28-45-60-61 |
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 1,1-Dimethyl-2-selenourea used for?
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1,1-Dimethyl-2-selenourea is primarily used as a precursor in chemical synthesis, notably for the production of CdSe quantum dots, and as a building block in organic synthesis and material science research.
What are the CAS number and chemical formula for 1,1-Dimethyl-2-selenourea?
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The CAS number for 1,1-Dimethyl-2-selenourea is 5117-16-8, and its linear formula is (CH3)2NC(Se)NH2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1,1-Dimethyl-2-selenourea with an assay of 97%. We do not represent this product as USP, BP, EP, or any pharmacopoeia grade.
How should 1,1-Dimethyl-2-selenourea be handled safely?
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1,1-Dimethyl-2-selenourea is acutely toxic if swallowed or inhaled and may cause damage to organs through prolonged exposure. It is also very toxic to aquatic life with long-lasting effects. Handle with appropriate personal protective equipment, including a dust mask or respirator, eyeshields, faceshields, and gloves, in a well-ventilated area.
Is 1,1-Dimethyl-2-selenourea a controlled substance?
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Based on the provided data, there is no indication that 1,1-Dimethyl-2-selenourea is a scheduled or controlled substance. However, users should always verify local regulations.
How is 1,1-Dimethyl-2-selenourea packed and shipped?
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1,1-Dimethyl-2-selenourea is packed according to safety regulations for hazardous materials, including classification as UN 3283, 6.1 / PG II. We export globally following all necessary compliance measures.
How can I request a sample or quote for 1,1-Dimethyl-2-selenourea?
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To request a sample or a quote for 1,1-Dimethyl-2-selenourea, please contact our sales department via the website or direct inquiry channels.
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