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Merck
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Documenti fondamentali

53370

Sigma-Aldrich

L-istidina

≥99.0% (AT)

Sinonimo/i:

Acido L-α-amino-β-(4-imidazolil)propionico

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About This Item

Formula empirica (notazione di Hill):
C6H9N3O2 · HCl · H2O
Numero CAS:
Peso molecolare:
209.63
Beilstein:
4168261
Numero MDL:
Codice UNSPSC:
12352209
ID PubChem:
NACRES:
NA.77

Livello qualitativo

Saggio

≥99.0% (AT)

Stato

solid

Attività ottica

[α]20/D +9.5±0.5°, c = 5% in 5 M HCl

Impurezze

≤0.3% foreign amino acids

Punto di fusione

254 °C (dec.) (lit.)

Solubilità

H2O: 1 g/10 mL, clear, colorless (hot)

Anioni in tracce

sulfate (SO42-): ≤100 mg/kg

Cationi in tracce

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
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
NH4+: ≤500 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

Stringa SMILE

O.Cl.N[C@@H](Cc1c[nH]cn1)C(O)=O

InChI

1S/C6H9N3O2.ClH.H2O/c7-5(6(10)11)1-4-2-8-3-9-4;;/h2-3,5H,1,7H2,(H,8,9)(H,10,11);1H;1H2/t5-;;/m0../s1
CMXXUDSWGMGYLZ-XRIGFGBMSA-N

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Descrizione generale

L-Histidine is a hydrophilic essential amino acid that has a basic sidechain containing an imidazole group.

Azioni biochim/fisiol

L-Histidine is biosynthesized from ATP, 5-phosphoribosyl-1-pyrophosphate (PRPP), and glutamine. This essential amino acid can be degraded to glutamate by histidiase, urocanase and imidazolonepropionase; it is also the precursor of histamine by action of histidine decarboxylase.

Codice della classe di stoccaggio

11 - Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 1

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Dispositivi di protezione individuale

Eyeshields, Gloves, type N95 (US)


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