high purity 98.0-101.0% L-Cysteine Base AJI92

Brief Description
CAS No.: 52-90-4 Other Names: L-cysteine base MF: C3H7NO2S
EINECS No.: 200-158-2 Place of Origin: Shaanxi China (Mainland) Type: Antidote
Grade Standard: Cosmetic Grade Brand Name: TOP Model Number: TOPC-0459
Purity: 98.0-101.0% Assay: 98.0-101.0% 
Delivery Terms & Packaging
Packaging Detail:25kg/bag
Delivery Detail:within 10days after receiving your deposit
Specifications
high purity 98.0-101.0% L-Cysteine Base AJI92

L-Cysteine,
Descriptionwhite or white crystalline powder, slightly characteristic taste..
CAS No.52-90-4
Assay: 98.0-101.0%

 L-Cysteine Base

ITEMSPECIFICATIONRESULT
SPECIFIC ROTATION [a]D20o:+8.3o ~  +9.5o+8.50o
STATE OF SOLUTION
[TRANSMITTANCE]:
Not less than 95.0%96.0%
CHLORIDE [Cl] :0.04% Max0.035%
AMMONIUM [NH4] : 0.02% Max0.01%
SULFATE (SO4) : 0.030% Max0.015%
IRON [Fe] : 10ppm Max5ppm
HEAVY METALS [Pb] : 10ppm Max4ppm
ARSENIC [As2O3] : 1ppm Max0.3ppm
OTHER AMINO ACIDS :
Chromatographically
not detectable
Qualified
LOSS ON DRYING : 0.5% Max0.3%
RESIDUE ON IGNITION[SULFATED] :0.10% Max0.05%
ASSAY:  98.0% ~ 101.0% 99.50%
PH4.5 to 5.54.8
CONCLUSION: BE IN ACCORDANCE WITH AJI92/FCCIV

L-Cysteine hcl monohydrate

ITEMSPECIFICATIONRESULT
SPECIFIC ROTATION [a]D20o:+5.5o ~  +7.0o+5.9o
STATE OF SOLUTION
[TRANSMITTANCE]:
Clear and colorless
Not less than 98.0%
98.0%
CHLORIDE [Cl] :19.89% to 20.29%20.20%
AMMONIUM [NH4] : 0.02% Max0.010%
SULFATE (SO4) : 0.020% Max0.010%
IRON [Fe] : 10ppm Max5ppm
HEAVY METALS [Pb] : 10ppm Max7ppm
ARSENIC [As2O3] : 1ppm Max0.5ppm
OTHER AMINO ACIDS :
Chromatographically
not detectable
Qualified
LOSS ON DRYING : 8.5% to 12.0%10.8%
RESIDUE ON IGNITION[SULFATED] :0.10% Max0.03%
ASSAY:  99.0% ~ 100.5% 99.92%
PH1.5 to 2.01.8
CONCLUSION: BE IN ACCORDANCE WITH AJI92/USP24

L-Cysteine HCL anhydrous

ITEMSPECIFICATIONRESULT
SPECIFIC ROTATION [a]D20o:+5.6o ~  +8.9o+6.30o
STATE OF SOLUTION
[TRANSMITTANCE]:
Clear and colorless
Not less than 98.0%
98.1%
HEAVY METALS [Pb] : 10ppm Max6ppm
ARSENIC [As2O3] : 1ppm Max0.5ppm
OTHER AMINO ACIDS :
Chromatographically
not detectable
Qualified
LOSS ON DRYING : 1.0% Max0.5%
RESIDUE ON IGNITION[SULFATED] :0.10% Max0.03%
ASSAY:  98.0% ~ 102.0% 99.93%
PH1.5 to 2.01.8
CONCLUSION: BE IN ACCORDANCE WITH USP24