L-Cysteine

L-Cysteine HCL ANHY AJI92

L-Cysteine HCL MONO AJI92

Infrared Absorptions

Meets the requirements

Meets the requirements

White crystals or crystalline powder

Meets the requirements

Meets the requirements

Specific Rotation [α]D²⁰

+5.6°to +8.9°

+5.5°to +7.0°

State of solution
(Transmittance)

Clear and colorless
not less than 98.0%

clear and colorless
not less than 98.0%

Chloride (Cl)

19.89 to 20.29%

Ammonium(NH₄⁺)

Not more than 0.02%

Sulfate (SO₄^2-)

Not more than 0.02%

Iron (Fe)

Not more than 10ppm

Heavy metals (Pb)

Not more than 10ppm

Not more than 10ppm

Arsenic (As₂O₃)

Not more than 1PPM

Not more than 1ppm

Other amino acids

Chromatographically
not detectable

Chromatographically
Not detectable

Loss on drying

Not more than 1.0%

8.5 to 12.0%

Residue on ignition
(sulfated)

Not more than 0.1%

Not more than 0.1%

Assay

98.0% to 102.0%

99.0% to 100.5%

PH

1.5 to 2.0

1.5 to 2.0

Pyrogen

No pyrogen