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W527602

Sigma-Aldrich

L-Isoleucine

99%, FCC, FG

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Synonym(s):
(2S,3S)-2-Amino-3-methylpentanoic acid
Linear Formula:
C2H5CH(CH3)CH(NH2)CO2H
CAS Number:
Molecular Weight:
131.17
Beilstein:
1721792
EC Number:
MDL number:
eCl@ss:
32160406
PubChem Substance ID:
NACRES:
NA.21

biological source

synthetic

Quality Level

grade

FG

reg. compliance

EU Regulation 1334/2008 & 178/2002
FCC
FDA 21 CFR 172.320

Assay

99%

form

crystalline powder

optical activity

[α]20/D +38.6 to +42.5°, c = 4 in 6 M HCl

mp

288 °C (dec.) (lit.)

application(s)

flavors and fragrances

Documentation

see Safety & Documentation for available documents

food allergen

no known allergens

Organoleptic

odorless

SMILES string

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

InChI

1S/C6H13NO2/c1-3-4(2)5(7)6(8)9/h4-5H,3,7H2,1-2H3,(H,8,9)/t4-,5-/m0/s1

InChI key

AGPKZVBTJJNPAG-WHFBIAKZSA-N

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1 of 4

This Item
I2752I528158879
L-Isoleucine 99%, FCC, FG

Sigma-Aldrich

W527602

L-Isoleucine

-
L-Isoleucine reagent grade, ≥98% (HPLC)

Sigma-Aldrich

I2752

L-Isoleucine

Essential Grade
L-Isoleucine

SAFC

I5281

L-Isoleucine

-
L-Isoleucine BioUltra, ≥99.5% (NT)

Sigma-Aldrich

58879

L-Isoleucine

Premium Grade
grade

FG

grade

reagent grade

grade

-

grade

-

assay

99%

assay

≥98% (HPLC)

assay

≥98.5%

assay

≥99.5% (NT), ≥99.5% (TLC)

optical activity

[α]20/D +38.6 to +42.5°, c = 4 in 6 M HCl

optical activity

-

optical activity

-

optical activity

[α]20/D +41.0±1°, c = 5% in 6 M HCl

mp

288 °C (dec.) (lit.)

mp

288 °C (dec.) (lit.)

mp

288 °C (dec.) (lit.)

mp

288 °C (dec.) (lit.)

documentation

see Safety & Documentation for available documents

documentation

-

documentation

-

documentation

-

General description

L-Isoleucine is an essential amino acid used as a supplement in sports nutrition. It is one of the free-amino acids found in common buckwheat.

Storage Class Code

11 - 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

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25G
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1000309185

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Lin LY, et al
Journal of Food Processing and Preservation, 33(6), 814-826 (2009)
Zorn H and Czermak P
Biotechnology of Food and Feed Additives., 219-220 null
Eva Blomstrand et al.
The Journal of nutrition, 136(1 Suppl), 269S-273S (2005-12-21)
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Previously, we determined the crystal structures of the dimeric ligand binding region of the metabotropic glutamate receptor subtype 1. Each protomer binds l-glutamate within the crevice between the LB1 and LB2 domains. We proposed that the two different conformations of
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Proceedings of the National Academy of Sciences of the United States of America, 111(14), E1334-E1343 (2014-04-08)
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