L-Cysteine

product name

L-Cysteine, BioUltra, ≥98.5% (RT)

product line

BioUltra

Quality Level

200

Assay

≥98.5% (RT)

form

powder or crystals

optical activity

[α]20/D +8.0±0.5°, c = 5% in 5 M HCl

technique(s)

HPLC: suitable

impurities

insoluble matter, passes filter test
≤0.5% foreign amino acids

ign. residue

≤0.05% (as SO₄)

loss

≤0.05% loss on drying, 20 °C (HV)

color

white

mp

240 °C (dec.) (lit.)

solubility

1 M HCl: 1 M at 20 °C, clear, colorless

anion traces

chloride (Cl^-): ≤100 mg/kg
sulfate (SO₄^2-): ≤50 mg/kg

cation traces

Al: ≤5 mg/kg
As: ≤0.1 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

λ

1 M in 1 M HCl

UV absorption

λ: 260 nm A_max: 1.5
λ: 280 nm A_max: 0.2

SMILES string

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

InChI

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

InChI key

XUJNEKJLAYXESH-REOHCLBHSA-N