NCI Carcinogenesis Bioassay (feed); No Evidence: mouse, rat NCITR*    National Cancer Institute Carcinogenesis Technical Report Series. (Bethesda, MD 20014) No. NCI-CG-TR-71 ,1978. . Reported in EPA TSCA Inventory.

The L-Tryptophan, with the CAS registry number 73-22-3,is also known as L(-)-Tryptophan; (S)-2-Amino-3-(1H-indol-3-yl)propanoic acid. It belongs to the product categories of Amino Acids;Amino Acids & Derivatives. This chemical's molecular formula is C₁₁H₁₂N₂O₂ and molecular weight is 204.23.Its EINECS number is 200-795-6. What's more,Its systematic name is L-Tryptophan. It is a white to off-white crystalline powder which is stable,incompatible with strong acids, strong oxidizing agents.And it can be improvement nutrition and enhancement physique. It is also uses in the biochemistry research, and it is used as sedative in the medicine.

Physical properties about  L-Tryptophan are:
(1)ACD/LogP:  0.704; (2)# of Rule of 5 Violations:  0; (3)ACD/LogD (pH 5.5):  -1.80; (4)ACD/LogD (pH 7.4):  -1.80; (5)ACD/BCF (pH 5.5):  1.00; (6)ACD/BCF (pH 7.4):  1.00; (7)ACD/KOC (pH 5.5):  1.00; (8)ACD/KOC (pH 7.4):  1.00; (9)#H bond acceptors:  4; (10)#H bond donors:  4; (11)#Freely Rotating Bonds:  4; (12)Index of Refraction:  1.698; (13)Molar Refractivity:  57.769 cm³; (14)Molar Volume:  149.875 cm³; (15)Polarizability:  22.901×10^-24 cm³ ; (16)Surface Tension:  71.1620025634766 dyne/cm; (17)Density:  1.363 g/cm³; (18)Flash Point:  224.687 °C; (19)Enthalpy of Vaporization:  74.437 kJ/mol; (20)Boiling Point:  447.908 °C at 760 mmHg; (21)Vapour Pressure:  0 mmHg at 25°C.

You could convert the following datas into the molecular structure:
(1)SMILES:c1ccc2c(c1)c(c[nH]2)C[C@@H](C(=O)O)N;
(2)Std. InChI:InChI=1S/C11H12N2O2/c12-9(11(14)15)5-7-6-13-10-4-2-1-3-8(7)10/h1-4,6,9,13H,5,12H2,(H,14,15)/t9-/m0/s1;
(3)Std. InChIKey:QIVBCDIJIAJPQS-VIFPVBQESA-N.

The toxicity data of  L-Tryptophan are as follows: