离岸价格
获取最新报价( Negotiable )
|Minimum Order
位置:
China
最小订单价格:
-
最小订单:
25 Kilogram
包装细节:
25kg/drum
交货时间:
7days
供应能力:
15 Ton per Month
付款方式:
Other, PayPal, Money Gram, Western Union, D/P, D/A, L/C, T/T
联系人 Ms. Evelyn
Rm 2405, Unit 1, Buiding 1, Taiyin Tower jianghan Econmic Development Zone, Wuhan, Hubei
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Item
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Specification( AJI*2)
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Results
|
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Appearance
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White crystalline powder
|
White crystalline powder
|
|
Stata of solution
(transmittance)
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Clear and colorless
Not less than *8.0%
|
*9.0%
|
|
Specific rotation [α]D*0
|
**4.0°to
**6.0°
|
**5.2°
|
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Chloride(Cl)
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Not more than 0.**0%
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Less than 0.**5%
|
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Ammonium (NH4)
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Not more than 0.*2%
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Less than 0.*2%
|
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Iron(Fe)
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Not more than *0ppm
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Less than *0ppm
|
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Arsenic(As2O3)
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Not more than 1ppm
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Less than 1ppm
|
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Heavy metals(Pb)
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Not more than *0ppm
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Less than *0ppm
|
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Loss on drying
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Not more than 0.2%
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0.*6%
|
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Residue on ignition
(sulfated)
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Not more than 0.*0%
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0.*5%
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L-Isomer Content
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Not more than 0.*0%
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Less than 0.*1%
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Other amino acids
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Not more than 0.*0%
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Less than 0.*5%
|
|
Assay
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*9.0% to **1.0%
|
*9.7%
|
|
PH
|
2.5 to 3.5
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2.*2
|
What is D-Aspartic Acid?
Aspartic acid is an α-amino acid with the chemical formula HOOCCH(NH2)CH2COOH. The carboxylate anion, salt, or ester of aspartic acid is known as aspartate. The L-isomer of aspartate is one of the *0 proteinogenic amino acids, i.e., the building blocks of proteins. Its codons are GAU and GAC.
Aspartic acid is, together with glutamic acid, classified as an acidic amino acid with a pKa of 4.0. Aspartate is pervasive in biosynthesis. As with all amino acids, the presence of acid protons depends on the residue's local chemical environment and the pH of the solution.
Where will D-Aspartic Acid be used for?
Aspartate is non-essential in mammals, being produced from oxaloacetate by transamination. It can also be made in the Urea Cycle from Ornithine and Citrulline. In plants and microorganisms, aspartate is the precursor to several amino acids, including four that are essential for humans: methionine, threonine, isoleucine, and lysine. The conversion of aspartate to these other amino acids begins with reduction of aspartate to its "semialdehyde," O2CCH(NH2)CH2CHO. Asparagine is derived from aspartate via transamidation:
-O2CCH(NH2)CH2CO*- + GC(O)NH3+ O2CCH(NH2)CH2CONH3+ + GC(O)O(where GC(O)NH2 and GC(O)OH are glutamine and glutamic acid, respectively)
