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| L-Cysteine (Free
Base) |
| Molecular
formula:C3H7NO2S¡¤HCL¡¤H2O |
| CAS NO.52-90-4 |
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| Description: |
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| White crystals or crystalline
powder ,tasteless . |
| Specifications: |
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| |
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| Item\Specifications |
AJI92 |
USP24 |
| Assay |
98.0 ~ 101.0 % |
98.0 ~ 102.0 % |
| PH |
4.5 ~ 5.5 |
|
| Specific
rotation[a]D20º |
+ 8.3º~ + 9.5º |
+ 7.0º~ +9.0º |
| Transmittance
(T430) |
¡Ý 95.0 % |
|
| Chloride(CL) |
¡Ü0.04 % |
¡Ü0.05 % |
| Ammonium(NH4) |
¡Ü0.02 % |
|
| Sulfate(SO4) |
¡Ü0.030 % |
¡Ü0.029% |
| Iron(Fe) |
¡Ü10ppm |
¡Ü20ppm |
| Heavy metals |
¡Ü10ppm |
¡Ü10ppm |
| Arsenic |
¡Ü1ppm(
AS2O3) |
¡Ü1ppm(
As) |
| Other amino acids |
Conforms |
Not detected by
TLC |
| Loss on drying |
¡Ü0.5 % |
¡Ü0.5 % |
| Residue on ignition |
¡Ü0.1 % |
¡Ü0.2 % |
| |
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| Package: |
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| Fiber drum double polyethylene
bags inside (25kgs). |
| Storage: |
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| Cool, dry, dark in closed
containers, recommended limit 1 years. |
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