L-Cysteine Free Base, AJI92

Specific rotation [α]_D²⁰::

+8.3° to + 9.5°

Assay:

99.0% to 101.0%

Loss on drying:

0.50% max.

Chloride [as Cl^-]:

0.04% max.

Ammonium [NH₄⁺]:

0.02% max.

Sulfate [SO₄^2-]:

0.03% max.

Iron [Fe]:

10ppm max.

Heavy metals [Pb]:

10ppm max.

Arsenic [As₂O₃]:

1ppm max.

PH:

4.5~5.5

Residue on ignition [sulfated]:

0.10% max.

Other amino acids:

Not detectable (Chromatographically)

State of solution:

Transmittance:

Clear and colorless

95.0% min.