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DL-Leucine

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Name

DL-Leucine

EINECS 206-328-2
CAS No. 328-39-2 Density 1.036 g/cm3
PSA 63.32000 LogP 1.14470
Solubility soluble in water Melting Point 293-296 °C (subl.)(lit.)
Formula C6H13NO2 Boiling Point 225.772 °C at 760 mmHg
Molecular Weight 131.175 Flash Point 90.344 °C
Transport Information N/A Appearance white crystalline powder
Safety 22-24/25-36 Risk Codes N/A
Molecular Structure Molecular Structure of 328-39-2 (DL-2-Amino-4-methylpentanoic acid) Hazard Symbols HarmfulXn
Synonyms

Leucine, DL- (8CI);NSC 9252;2-Amino-4-methylvaleric acid;Pentanoic acid, 2-amino-4-methyl-;Valeric acid, 2-amino-4-methyl-;α-Aminoisocaproic acid;α-Amino-γ-methylvaleric acid;

Article Data 116

DL-Leucine Consensus Reports

DL-Leucine is reported in EPA TSCA Inventory.

DL-Leucine Specification

1. Introduction of DL-Leucine

DL-Leucine, with the systematic name of 2-amino-4-methylpentanoic acid, is one kind of white crystalline powder. It belongs to the following product categories: Amino Acid Derivatives; Leucine [Leu, L]; alpha-Amino Acids; Amino Acids; Biochemistry. The leucine is a kind of an essential amino acid which means that it can not synthesized in animals, hence it must be ingested, usually as a component of proteins. It is always used in the formation of sterols in adipose and muscle tissue. What's more, it is the only dietary protein that has the capacity to stimulate muscle protein synthesis, and L-Leucine is always used as a food additive.

2. Properties of DL-Leucine

The characteristics of DL-Leucine are as followings: (1)ACD/LogP: 0.80; (2)# of Rule of 5 Violations: 0; (3)ACD/BCF (pH 5.5): 1; (4)ACD/BCF (pH 7.4): 1; (5)ACD/KOC (pH 5.5): 1; (6)ACD/KOC (pH 7.4): 1; (7)#H bond acceptors: 3; (8)#H bond donors: 3; (9)#Freely Rotating Bonds: 4; (10)Polar Surface Area: 63.32 Å2; (11)Index of Refraction: 1.463; (12)Molar Refractivity: 34.863 cm3; (13)Molar Volume: 126.632 cm3; (14)Polarizability: 13.821×10-24cm3; (15)Surface Tension: 39.002 dyne/cm; (16)Density: 1.036 g/cm3; (17)Flash Point: 90.344 °C; (18)Enthalpy of Vaporization: 50.93 kJ/mol; (19)Boiling Point: 225.772 °C at 760 mmHg; (20)Vapour Pressure: 0.031 mmHg at 25°C. 

3. Structure Descriptors of DL-Leucine

You could convert the following datas into the molecular structure:
(1)SMILES: CC(C)CC(C(=O)O)N
(2)InChI: InChI=1/C6H13NO2/c1-4(2)3-5(7)6(8)9/h4-5H,3,7H2,1-2H3,(H,8,9)
(3)InChIKey: ROHFNLRQFUQHCH-UHFFFAOYAO

4. Preparation of DL-Leucine

Mixed 2-bromo-4-methylvaleric acid and strong aqua ammonia, then left to stand for 7 days, and you can get the product after filter. 

5. Uses of DL-Leucine

DL-Leucine can react with di-pyridin-2-yl-methanone to produce 1-(2'-Pyridyl)-3-(2'-methyl)propyl-2-azaindolizine. This reaction will need reagent AcOH, and the menstruum methanol. The reaction time is 12 hours with heating, and the yield is about 56%.



6. Safety information of DL-Leucine

Hazard Codes: Xn
Safety Statements: 22-24/25-36
WGK Germany: 3
HS Code: 29224995

You should be cautious while dealing with this chemical. It irritates to eyes, respiratory system and skin. Therefore, you had better take the following instructions: Do not breathe dust, and avoid contact with skin and eyes.

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