ST638
ST638 (CAS: 107761-24-0, C19H18N2O3S, MW: 354.42) is a yellow solid chemical compound. It serves as a valuable tool in cell biology and cell signaling research, particularly within the domains of kinase/phosphatase biology and receptor tyrosine kinase pathways. Its specific inhibitory properties make it relevant for studies involving Vascular Endothelial Growth Factor Receptors (VEGFRs), contributing to a deeper understanding of cellular processes and disease mechanisms.
- IUPAC
- α-Cyano-(3-ethoxy-4-hydroxy-5-phenylthiomethyl)cinnamide

Receptor Tyrosine Kinase (RTK) Inhibition Studies
ST638 is utilised as an inhibitor in research focusing on RTK signalling pathways. It helps scientists elucidate the roles of specific RTKs, such as VEGFR, in cellular functions and disease development.
Cellular Signalling Research
This compound is applied in investigating intracellular signalling cascades regulated by kinases and phosphatases. Its use aids in understanding signal transduction mechanisms critical for cell behaviour.
Neuroscience Research Tool
ST638 can be employed in neuroscience research where RTK signalling plays a role in neuronal function and development. Its specific inhibitory action allows for targeted investigations within the nervous system.
| Molecular weight | 354.42 |
|---|---|
| Empirical formula | C19H18N2O3S |
| Assay | ≥98% (HPLC) |
| Form | solid |
| Colour | yellow |
| Solubility | DMSO: soluble19 mg/mL |
| Storage temperature | −20°C |
| Melting point | 134-135.5 °C |

Hazard statements
- H302Harmful if swallowed
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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 ST638 used for?
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ST638 is used in cell biology research, particularly in studies of cell signaling, kinase/phosphatase biology, and receptor tyrosine kinase (RTK) pathways, including those involving Vascular Endothelial Growth Factor Receptors (VEGFRs).
What are the CAS number and formula for ST638?
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The CAS number for ST638 is 107761-24-0, and its empirical formula is C19H18N2O3S.
What grade and purity does Tech Serve Solutions supply for ST638?
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Tech Serve Solutions supplies ST638 with an assay of ≥98% (HPLC). We do not represent this product as USP, BP, EP, or pharmacopoeia grade.
What are the safety and handling requirements for ST638?
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ST638 carries a Warning signal word and hazard statement H302 (Harmful if swallowed). Appropriate personal protective equipment includes eyeshields, gloves, and a type N95 (US) or type P1 (EN143) respirator filter. It has a WGK Germany classification of 3.
How is ST638 packaged, shipped, and exported?
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ST638 is typically supplied as a yellow solid and stored at -20°C. Tech Serve Solutions, as a global supplier, handles the packaging, shipping, and export of this chemical in compliance with all relevant regulations.
How can I request a sample or quote for ST638?
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To request a sample or quote for ST638, please contact our sales department through the official Tech Serve Solutions website or your designated account manager.
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