N-ACETYL-L-TYROSINE ETHYL ESTER

CAS No.：840-97-1

Important Notice

This product is a chemical product/pharmaceutical intermediate. It is not a drug, an active pharmaceutical ingredient (API), or a pharmaceutical-grade material. It has not been granted a drug approval number or a Chemical Drug Substance Approval Notice, has not passed drug-related review and approval, and is not manufactured, tested, or released in accordance with pharmaceutical GMP.
This product is intended solely for non-clinical research, process development, quality studies, further chemical processing, or chemical synthesis. It must not be used in drug-product manufacturing, clinical trials, clinical diagnosis, or administration to humans or animals, or be sold, used as an input, submitted for regulatory filing, or released as an API or pharmaceutical material.
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N-ACETYL-L-TYROSINE ETHYL ESTER Basic information

Product Name:	N-ACETYL-L-TYROSINE ETHYL ESTER
Synonyms:	N-ALPHA-ACETYL-L-TYROSINE ETHYL ESTER;N-ACETYL-L-TYR ETHYL ESTER;N-ACETYL-L-TYROSINE ETHYL ESTER;ethyln-alpha-acetyl-tyrosinate;ATEE;ETHYLACETYL-L-TYROSINE;AC-TYR-OET;AC-TYROSINE-OET
CAS:	840-97-1
MF:	C13H17NO4
MW:	251.28
EINECS:	212-663-5
Product Categories:	Amino Acid Ethyl Esters;Amino Acids (C-Protected);Amino Acids;Ac-Amino Acids;Amino Acids (N-Protected);Biochemistry
Mol File:	840-97-1.mol

N-ACETYL-L-TYROSINE ETHYL ESTER Chemical Properties

Melting point	78-81 °C
Boiling point	394.43°C (rough estimate)
density	1.1667 (rough estimate)
refractive index	22 ° (C=1, EtOH)
storage temp.	Sealed in dry,2-8°C
pka	9.75±0.15(Predicted)
Water Solubility	3.48g/L(28 ºC)
CAS DataBase Reference	840-97-1(CAS DataBase Reference)
EPA Substance Registry System	L-Tyrosine, N-acetyl-, ethyl ester (840-97-1)

Safety Information

Safety Statements	24/25
WGK Germany	3
F	10-21

MSDS Information

Provider	Language
SigmaAldrich	English

N-ACETYL-L-TYROSINE ETHYL ESTER Usage And Synthesis

Enzyme inhibitor

This ester (FW = 251.28 g/mol; Abbreviation ATEE) is a substrate for chymotrypsin that is frequently used in assays of that enzyme. The reaction can be followed by observing the production of free carboxyl groups or by the decrease in absorbance at 237 nm and pH 7. Supersaturated stock solutions (i.e., 10-20 mM) can be prepared by dissolving ATEE in water at 85°C, followed by rapidly cooling to room temperature. These solutions are typically stable for six to twelve hours. N-Acetyl-L-tyrosine ethyl ester inhibits protein-disulfide reductase, glutathione-requiring; thiolsubtilisin; complement component C’.

N-ACETYL-L-TYROSINE ETHYL ESTER Preparation Products And Raw materials

Raw materials	N-Acetyl-L-tyrosine
Preparation Products	Levothyroxine Sodium Impurity 16-->Ethyl L-tyrosinate

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