L(+)-Histidin 99,0-101,0% (durch Perchlorsäure-Titration), EMPROVE® EXPERT Ph. Eur., USP, JP, SAFC®
Lieferant: Merck
Synonyme:
(S)-(+)-2-Amino-3-(4-imidazoyl)propansäure
, His
, L-3-Imidazol-4-ylalanin
, (2S)-(+)-Histidin
, H
, (S)-(+)-Histidin
, H-His-OH
1.04352.1000EA
1720
EUR
1.04352.1000
1.04352.9010
L(+)-Histidin 99,0-101,0% (durch Perchlorsäure-Titration), EMPROVE® EXPERT Ph. Eur., USP, JP, SAFC®
L(+)-Histidin
|
Formel:
C₆H₉N₃O₂ Molecular Weight: 155,16 g/mol Schmelzpunkt: 272…273 °C Dichte: 1,44 g/cm³ (20 °C) Lagertemperatur: Raumtemperatur |
MDL:
MFCD00064315 CAS-Nummer: 71-00-1 EINECS: 200-745-3 Merck Index: 13,04741 |
|
Spezifikation Testergebnisse
| Assay (acidimetric, calculated on dried substance) | 98.5 - 101.0 % |
| Assay (perchloric acid titration, calculated on dried substance) | 99.0 - 101.0 % |
| Identity (IR-spectrum) | passes test |
| Appearance | white to almost white fine-crystalline powder or colorless crystals |
| Appearance of solution (50 g/l; water) | clear and not more intense in color than reference solution BY₇. |
| Appearance of solution (20 g/l, water) | clear and colorless |
| Spec. rotation (α 20/D, 110 g/l, hydrochloric acid 120 g/l, calc. on dried substance) | +11.4 to +12.4 |
| Spec. rotation (α 25/D, 110 g/l, hydrochloric acid 6 mol/l, calc. on dried substance) | +12.6 to +14.0 |
| Spec. rotation (α 20/D, 110 g/l, hydrochloric acid 6 mol/l, calc. on dried substance) | +11,8° to +12,8° |
| pH (20 g/l, CO₂-free water) | 7.0 - 8.5 |
| Chloride (Cl) | ≤ 200 ppm |
| Sulfate (SO₄) | ≤ 200 ppm |
| Heavy metals (as Pb) | ≤ 10 ppm |
| Cu(Copper) | ≤ 25 ppm |
| Fe (Iron) | ≤ 10 ppm |
| Fe (Iron) (ICP) | ≤ 10 ppm |
| Mn (Manganese) | ≤ 25 ppm |
| Zn (Zinc) | ≤ 130 ppm |
| Related Compounds, total (TLC) | ≤ 0.5 % |
| Related substances (TLC) | passes test |
| Ninhydrin-positive substances (LC) (any ninhydrin-positive impurity) | ≤ 0.2 % |
| Ninhydrin-positive substances (LC) (ammonium (570 nm)) | ≤ 0.02 % |
| Ninhydrin-positive substances (LC) (total impurities) | ≤ 0.5 % |
| Residual solvents (ICH (Q3C)) | excluded by manufacturing process |
| Sulfated ash (600 °C) | ≤ 0.1 % |
| Loss on drying (105 °C; 3 h) | ≤ 0.2 % |
| Bacterial endotoxins | < 2.0 |
| Microbiological test (total aerobic microbial count (TAMC)) | ≤ 10² |
| Microbiological test (total yeast and mould count (TYMC)) | ≤ 10² |
| Elemental impurity specifications have been set considering ICH Q3D (Guideline for Elemental Impurities). Class 1-3 elements are not likely to be present above the ICH Q3D option 1 limit, unless specified and indicated (*). | |
| Corresponds to Ph. Eur., JP, USP |
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