1.04350
L-Histidine monohydrochloride monohydrate
for biochemistry
Synonym(s):
His, L-α-Amino-β-(4-imidazolyl)propionic acid monohydrochloride
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About This Item
vapor pressure
<1 hPa ( 20 °C)
Quality Level
form
crystalline powder
pH
3.5-4.5 (20 °C, 100 g/L in H2O)
mp
254 °C (dec.) (lit.)
solubility
149.55 g/L
density
1.49 g/cm3 at 20 °C
bulk density
770 kg/m3
storage temp.
2-30°C
SMILES string
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
InChI key
CMXXUDSWGMGYLZ-XRIGFGBMSA-N
Analysis Note
Identity (IR-spectrum): passes test
Appearance: white to almost white crystalline powder or colorless crystals
Appearance of solution (50 g/l CO₂-free water): clear and colorless
Spec. rotation (α 20/D, 110 g/l, hydrochloric acid 120 g/l, calc. on dried substance): +9.2 to +10.6
Sulfate (SO₄): ≤ 0.02 %
Heavy metals (as Pb): ≤ 0.001 %
As (Arsenic): ≤ 0.0005 %
Ca (Calcium): ≤ 0.001 %
Co (Cobalt): ≤ 0.0005 %
Fe (Iron): ≤ 0.0005 %
K (Potassium): ≤ 0.0005 %
Mg (Magnesium): ≤ 0.0005 %
Na (Sodium): ≤ 0.005 %
NH₄ (Ammonium): ≤ 0.01 %
Zn (Zinc): ≤ 0.0005 %
Foreign amino acids: ≤ 0.3 %
Other ninhydrine positive substances: ≤ 0.1 %
Loss on drying (150 °C): 7.0 - 10.0 %
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Storage Class
11 - Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable
Certificates of Analysis (COA)
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