L-Cystine

L-Cystine

Chemical Name:(+)-2-Amino-3-mercaptopropionic acid
Molecular Formula:C3H7NO2S
Molecular Weight:121.15
Cas No:[52-90-4]
Appearance:White crystalline powder; tasteless, easily soluble in water but insoluble in alcohol and ether
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Product Details

Cystine is the oxidized dimer form of the amino acid cysteine and has the formula(SCH2CH(NH2)CO2H)2. It is a white solid that is slightly soluble in water. It serves two biologicalfunctions: a site of redox reactions and a mechanical linkage that allows proteins to retain their three-dimensional structure.

Chemical Name:

(+)-2-Amino-3-mercaptopropionic acid

Structure Formula:

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


6371002822924004046234192

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.


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