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1.02839

Millipore

L-Cysteine hydrochloride monohydrate

for biochemistry

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Synonym(s):
Cys, L-Cysteinium Chloride Monohydrate, L-Cysteine Hydrochloride, Monohydrate
Linear Formula:
HSCH2CH(NH2)COOH · HCl · H2O
CAS Number:
Molecular Weight:
175.63
Beilstein/REAXYS Number:
5158059
MDL number:
EC Index Number:
200-157-7

vapor pressure

<0.1 hPa ( 20 °C)

Quality Level

assay

98.5-101.0% dry basis (alkalimetric)

form

crystalline powder

pH

0.8-1.2 (20 °C, 100 g/L in H2O)

mp

168-170 °C

solubility

650 g/L

density

1.54 g/cm3

bulk density

780 kg/m3

anion traces

sulfate (SO42-): ≤300 ppm

cation traces

Fe: ≤20 ppm
heavy metals (as Pb): ≤10 ppm

storage temp.

2-30°C

SMILES string

O.Cl.N[C@@H](CS)C(O)=O

InChI

1S/C3H7NO2S.ClH.H2O/c4-2(1-7)3(5)6;;/h2,7H,1,4H2,(H,5,6);1H;1H2/t2-;;/m0../s1

Inchi Key

QIJRTFXNRTXDIP-JIZZDEOASA-N

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This Item
3012230129C7880
vibrant-m

30122

L-Cysteine hydrochloride monohydrate

-
vibrant-m

30129

L-Cysteine hydrochloride monohydrate

Premium Grade
vibrant-m

C7880

L-Cysteine hydrochloride monohydrate

Essential Grade
assay

98.5-101.0% dry basis (alkalimetric)

assay

98.5-101.0%

assay

≥99.0% (RT)

assay

≥98% (TLC)

pH

0.8-1.2 (20 °C, 100 g/L in H2O)

pH

-

pH

-

pH

-

form

crystalline powder

form

solid

form

crystals

form

powder

cation traces

Fe: ≤20 ppm, heavy metals (as Pb): ≤10 ppm

cation traces

-

cation traces

Al: ≤10 mg/kg, As: ≤0.5 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+: ≤500 mg/kg, Na: ≤100 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Sr: ≤5 mg/kg, Zn: ≤5 mg/kg

cation traces

-

mp

168-170 °C

mp

176 °C

mp

-

mp

-

Biochem/physiol Actions

NMDA glutamatergic receptor antagonist.

Analysis Note

Assay (alkalimetric, calculated on dried substance): 98.5 - 101.0 %
Identity (IR-spectrum): passes test
Identity (Chloride): passes test
Appearance: white or almost white, crystalline powder or colorless crystals
Appearance of solution (25 g/l, water): clear and not more intense in color than reference solution BY6
Spec. rotation (α 20/D, 80 g/l, hydrochloric acid 250 g/l, calc. on dried substance): +5.5 to +7.0
Spec. rotation (α 25/D, 80 g/l, hydrochloric acid 6 mol/l, calc. on dried substance): +5.7 to +6.8
Sulfate (SO₄): ≤ 300 ppm
Heavy metals (as Pb): ≤ 10 ppm
Fe (Iron): ≤ 20 ppm
Related Compounds, total (TLC): ≤ 0.5 %
Ninhydrin-positive substances (LC)(impurity A (570 nm)): ≤ 0.5 %
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): ≤ 1.0 %
Residual solvents (ICH Q3C): excluded by manufacturing process
Sulfated ash (600 °C): ≤ 0.1 %
Loss on drying (Vacuum < 0.7 kPa, P₂O₅, 24 h): 8.0 - 12.0 %
Bacterial endotoxins: ≤ 6.0 I.U./g

Storage Class

11 - Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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L-Cysteine hydrochloride United States Pharmacopeia (USP) Reference Standard

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1161509

L-Cysteine hydrochloride

L-Cysteine, Free Base Naturally-occurring non-essential amino acid.

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243005

L-Cysteine, Free Base

L-Cysteine for biochemistry

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1.02838

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