Following is the structure of Fmoc-His(Trt)-OH (CAS NO.109425-51-6):
                  
Molecular Formula: C₄₀H₃₃N₃O₄
Formula Weight: 619.71
Index of Refraction: 1.656
Molar Refractivity: 183.59 cm³
Molar Volume: 499.4 cm³
Density: 1.24 g/cm³
Flash Point: 444.7 °C
Storage temp.: 2-8 °C 
Melting point: 150-155 °C(lit.)
Surface Tension: 51.8 dyne/cm
Enthalpy of Vaporization: 123.72 kJ/mol
Boiling Point: 811.7 °C at 760 mmHg
Vapour Pressure: 7.59E-28 mmHg at 25 °C
Appearance of Fmoc-His(Trt)-OH (CAS NO.109425-51-6): White crystalline powder
Product Categories of Fmoc-His(Trt)-OH (CAS NO.109425-51-6): Protected Amino Acids; Amino Acid Derivatives; Amino Acids; Histidine [His, H]; Fmoc-Amino Acids and Derivatives; Amino Acids (N-Protected); Biochemistry; Fmoc-Amino Acids; Fmoc-Amino acid series
SMILES: O=C(O)C(NC(=O)OCC3c1ccccc1c2ccccc23)Cc4ncn(c4)C(c5ccccc5)(c6ccccc6)c7ccccc7
InChI: InChI=1/C40H33N3O4/c44-38(45)37(42-39(46)47-26-36-34-22-12-10-20-32(34)33-21-11-13-23-35(33)36)24-31-25-43(27-41-31)40(28-14-4-1-5-15-28,29-16-6-2-7-17-29)30-18-8-3-9-19-30/h1-23,25,27,36-37H,24,26H2,(H,42,46)(H,44,45)
InChIKey: XXMYDXUIZKNHDT-UHFFFAOYAI

Acute toxicity: n.av.
LD₅₀ (oral/rat): n.av.
LD₅₀: n.av.
Human dosage: n.av.
Additional information: Fmoc-His(Trt)-OH has moderate acidic properties and could cause related effects by contact.
CAUTION: SUBSTANCE NOT FULLY TESTED

Hazard Codes: Xi
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
F: 10-21

 Fmoc-His(Trt)-OH , its cas register number 109425-51-6. It also can be called N-Fmoc-N'-trityl-L-histidine ; and N-9-Fluorenylmethoxycarbonyl-N'-trityl-L-histidine .