Merck
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61819

Sigma-Aldrich

L-Leucine

BioUltra, ≥99.5% (NT)

Synonym(s):
(S)-2-Amino-4-methylpentanoic acid
Linear Formula:
(CH3)2CHCH2CH(NH2)CO2H
CAS Number:
Molecular Weight:
131.17
Beilstein:
1721722
EC Number:
MDL number:
eCl@ss:
32160406
PubChem Substance ID:
NACRES:
NA.26

product line

BioUltra

Quality Level

assay

≥99.5% (NT)

form

powder or crystals

optical activity

[α]20/D +15.5±0.5°, c = 5% in 5 M HCl

technique(s)

NMR: suitable

impurities

insoluble matter, passes filter test
≤0.3% foreign amino acids

ign. residue

≤0.1%

loss

≤0.1% loss on drying, 20 °C (HV)

color

white

mp

>300 °C (lit.)

solubility

1 M HCl: 0.1 M at 20 °C, clear, colorless

anion traces

chloride (Cl-): ≤200 mg/kg
sulfate (SO42-): ≤100 mg/kg

cation traces

Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
NH4+: ≤100 mg/kg
Na: ≤100 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

λ

0.1 M in 1 M HCl

UV absorption

λ: 260 nm Amax: 0.05
λ: 280 nm Amax: 0.05

SMILES string

CC(C)C[C@H](N)C(O)=O

InChI

1S/C6H13NO2/c1-4(2)3-5(7)6(8)9/h4-5H,3,7H2,1-2H3,(H,8,9)/t5-/m0/s1

InChI key

ROHFNLRQFUQHCH-YFKPBYRVSA-N

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Other Notes

As spacer in isotachophoresis of serum proteins; Growth requirement of various microorganisms

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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