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EINECS 276-262-7
CAS No. 71989-38-3 Density 1.218 g/cm3
Solubility Melting Point 153-156 °C
Formula C28H29NO5 Boiling Point 658.2 °C at 760 mmHg
Molecular Weight 459.54 Flash Point 351.9 °C
Transport Information Appearance white to light yellow crystal powder
Safety 26 Risk Codes 36/37/38
Molecular Structure Molecular Structure of 71989-38-3 (L-Tyrosine,O-(1,1-dimethylethyl)-N-[(9H-fluoren-9-ylmethoxy)carbonyl]-) Hazard Symbols IrritantXi

(S)-3-(4-tert-Butoxyphenyl)-2-[[[(9H-fluoren-9-yl)methoxy]carbonyl]amino]propionicacid;NSC 334301;O-(1,1-Dimethylethyl)-N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-tyrosine;Fmoc-Tyr(tBu)-OH;


Fmoc-O-tert-butyl-L-tyrosine Chemical Properties

IUPAC Name: 2-(9H-Fluoren-9-ylmethoxycarbonylamino)-3-[4-[(2-methylpropan-2-yl)oxy]phenyl]propanoic acid 
Following is the structure of L-Tyrosine,O-(1,1-dimethylethyl)-N-[(9H-fluoren-9-ylmethoxy)carbonyl]- (CAS NO.71989-38-3):
Empirical Formula: C28H29NO5
Molecular Weight: 459.5336
EINECS: 276-262-7
Index of Refraction: 1.599
Molar Refractivity: 128.94 cm3
Molar Volume: 376.9 cm3
Density: 1.218 g/cm3
Flash Point: 351.9 °C
Storage temp.: 2-8 °C
Melting point: 153-156 °C
Surface Tension: 50.5 dyne/cm
Enthalpy of Vaporization: 101.8 kJ/mol
Boiling Point: 658.2 °C at 760 mmHg
Vapour Pressure: 3.2E-18 mmHg at 25 °C
Product Categories of L-Tyrosine,O-(1,1-dimethylethyl)-N-[(9H-fluoren-9-ylmethoxy)carbonyl]- (CAS NO.71989-38-3): Fluorenes, Flurenones; Amino Acid Derivatives; Amino Acids; Tyrosine [Tyr, Y]; Fmoc-Amino Acids and Derivatives; Amino Acids (N-Protected); Biochemistry; Fmoc-Amino Acids; Fmoc-Amino acid series
Appearance of L-Tyrosine,O-(1,1-dimethylethyl)-N-[(9H-fluoren-9-ylmethoxy)carbonyl]- (CAS NO.71989-38-3): White to off-white crystalline powder
Canonical SMILES: CC(C)(C)OC1=CC=C(C=C1)CC(C(=O)O)NC(=O)OCC2C3=CC=CC=C3C4=CC=CC=C24
InChI: InChI=1S/C28H29NO5/c1-28(2,3)34-19-14-12-18(13-15-19)16-25(26(30)31)29-27(32)33-17-24-22-10-6-4-8-20(22)21-9-5-7-11-23(21)24/h4-15,24-25H,16-17H2,1-3H3,(H,29,32)(H,30,31)

Fmoc-O-tert-butyl-L-tyrosine Safety Profile

Hazard Codes: IrritantXi
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
WGK Germany: 3

Fmoc-O-tert-butyl-L-tyrosine Specification

 L-Tyrosine,O-(1,1-dimethylethyl)-N-[(9H-fluoren-9-ylmethoxy)carbonyl]- , its cas register number 71989-38-3. It also can be called Fmoc-O-tert-butyl-L-tyrosine ; N-Fmoc-O-tert-butyl-L-tyrosine ; O-(tert-Butyl)-N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-tyrosine ; and Fmoc-Tyr(tBu)-OH .

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