O-Phospho-L-tyrosine
O-Phospho-L-tyrosine (CAS: 21820-51-9), with the molecular formula C9H12NO6P and a molecular weight of 261.17 g/mol, is a phosphorylated derivative of the amino acid L-tyrosine. This compound serves as a valuable biochemical reagent, primarily utilised in research settings. Its structural similarity to naturally occurring phosphorylated amino acids makes it an important tool for investigating biological pathways and enzymatic reactions. It is supplied by Tech Serve Solutions for laboratory use.
- IUPAC
- L-3-(4-Hydroxyphenyl)alanine 4′-phosphate,L-Tyrosine-O-phosphate
- Synonyms
- L-3-(4-Hydroxyphenyl)alanine 4′-phosphateL-Tyrosine-O-phosphate

Biochemical Research
O-Phospho-L-tyrosine is employed as a substrate or inhibitor in studies of protein tyrosine phosphorylation and dephosphorylation. It aids in understanding signal transduction pathways within cells.
Enzyme Assays
This compound is used in the development and validation of assays for enzymes involved in phosphate metabolism and protein modification. It helps in characterising enzyme kinetics and mechanisms.
Chemical Synthesis
As a modified amino acid, O-Phospho-L-tyrosine can be used as a building block in the synthesis of more complex peptides or peptidomimetics for pharmaceutical research.
| Molecular weight | 261.17 |
|---|---|
| Empirical formula | C9H12NO6P |
| Storage temperature | −20°C |
| 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 O-Phospho-L-tyrosine used for?
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O-Phospho-L-tyrosine is primarily used in biochemical research and enzyme assays, particularly for studying protein tyrosine phosphorylation and related signalling pathways.
What is the CAS number and molecular formula for O-Phospho-L-tyrosine?
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The CAS number for O-Phospho-L-tyrosine is 21820-51-9, and its molecular formula is C9H12NO6P.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies O-Phospho-L-tyrosine for research and laboratory use. The specific assay and purity are detailed in the product's technical specifications. We do not represent this product as USP, BP, or EP grade unless explicitly stated.
How should O-Phospho-L-tyrosine be handled and stored?
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Handle O-Phospho-L-tyrosine with appropriate personal protective equipment, including eyeshields and gloves. A respirator filter such as type N95 (US) or P1 (EN143) is recommended. Store the compound at -20°C.
Is O-Phospho-L-tyrosine a hazardous substance?
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According to the GHS classification, O-Phospho-L-tyrosine has a WGK Germany rating of 3, indicating it is hazardous. Always consult the Safety Data Sheet (SDS) before handling.
How is O-Phospho-L-tyrosine packed and exported?
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O-Phospho-L-tyrosine is carefully packed to ensure stability during transit and is exported globally by Tech Serve Solutions, adhering to all relevant shipping regulations.
How can I request a sample or quote for O-Phospho-L-tyrosine?
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To request a sample or a quote, please contact our sales department through the website or by phone, referencing the product name and CAS number 21820-51-9.
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