L-Cystine
Chemical Name：(+)-2-Amino-3-mercaptopropionic acid
Molecular Formula：C3H7NO2S
Molecular Weight：121.15
Cas No：[52-90-4]
Characteristics：White crystalline powder; tasteless, easily soluble in water but insoluble in alcohol and ether
Quality Standards：AJI97
Item | Specifications (AJI97 ) |
Appearance | White crystalline powder |
| Assay, % | 98.0~101.0 |
Specific rotation | +8.3°~+9.5° |
Loss on drying, % | ≤0.5 |
Transmittance, % | ≥95.0 |
Chloride (as Cl), % | ≤0.04 |
Sulfate (as SO4), % | ≤0.03 |
Ammonium as (as NH4), % | ≤0.02 |
Iron (as Fe), % | ≤0.001 |
Heavy Metals (as Pb), % | ≤0.001 |
Arsenic (as As), % | ≤0.0001 |
pH Value | 4.5~5.5 |
Residue on ignition, % | ≤0.1 |
Other amino acid | No detd |
Package and Transport：This product is contained in a double-layer package, the inner layer being a sealed nonpoisonous polyethylene bag or alumin, and the outer layer being a paper board barrel. Each barrel contains a net weight of 25kg. Packages may be arranged in accordance with customer’s requirements.
Handle with care. Protect the product from sunshine or rain. Do not transport them together with poisonous or harmful goods. This product belongs to the non-dangerous category and can be transported as a general chemical product.
Storage： Stored in dry, clean and ventilated places. In order to avoid pollution, it is prohibited to place this product together with poisonous or harmful substances. The expiry date is for two years.
Hebei Huaheng Biological Technology Co., Ltd
TEL：0318-8628255
FAX：0318-8628286
Email：info@jizhouhuaheng.com
Address：No.777 Xinghua South Street,Jizhou City,Hebei Pro.,China
