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3,5-Dibromo-L-tyrosine

Also known as: L-3,5-Dibromotyrosine, (2S)-2-amino-3-(3,5-dibromo-4-hydroxyphenyl)propanoic acid, 3,5-Dibromotyrosine, H-TYR(3,5-BR2)-OH, H-PHE(3,5-BR2,4-OH)-OH, L-4-hydroxy-3,5-dibromo-phenylalanine, β-(3,5-Dibromo-4-hydroxyphenyl)alanine

3,5-Dibromo-L-tyrosine (CAS 300-38-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H9Br2NO3 and a molecular weight of 338.981 g/mol. Key properties include a boiling point of 416.6±45.0 °C at 760 mmHg, a density of 2.0±0.1 g/cm3 and a flash point of 205.7±28.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
300-38-9
Jingsj CID
J-1991175-2
Molecular Formula
C9H9Br2NO3
Molecular Weight
338.981 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point416.6±45.0 °C at 760 mmHg
Density2.0±0.1 g/cm3
Flash Point205.7±28.7 °C
Exact Mass336.894897
PSA83.55000
LogP2.31
Vapor Pressure0.0±1.0 mmHg at 25°C
Refractive Index1.669

Activity & Biological Data

Additional Information[1]. Wu W, et al. 3-Bromotyrosine and 3,5-dibromotyrosine are major products of protein oxidation by eosinophil peroxidase: potential markers for eosinophil-dependent tissue injury in vivo. Biochemistry. 1999;38(12):3538-3548.

Frequently Asked Questions

What is the CAS number of 3,5-Dibromo-L-tyrosine?

The CAS number of 3,5-Dibromo-L-tyrosine is 300-38-9.

What are the molecular formula and molecular weight of 3,5-Dibromo-L-tyrosine?

3,5-Dibromo-L-tyrosine has molecular formula C9H9Br2NO3 and molecular weight 338.981 g/mol.

What are the upstream and downstream products of 3,5-Dibromo-L-tyrosine?

For 3,5-Dibromo-L-tyrosine, Upstream Products: L-Tyrosine, acetic acid; Downstream Products: Methyl 3-(3,5-dibromo-4-hydroxyphenyl)-2-[(2,2,2-trifluoroacetyl)amino]propanoate, 4-Hydroxyphenylacetamide, Boc-3,5-dibromo-L-tyrosine.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "3,5-Dibromo-L-tyrosine (CAS 300-38-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1991175-2 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.