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L-tryptophan,CAS. 73-22-3
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L-tryptophan,CAS. 73-22-3
Product Description

L-tryptophan:

 

1)Description: White to yellowish white crystals or crystalline powder.

2)Use: Tryptophan is heterocyclic amino acid, is a kind of important and necessary amino acids for human body. It is widely applied in pharmaceutical and food fields.

3)Quality Index:

 

Tests

Limits

Test results

Description

White crystals or crystalline powder

conforms

Identification(IR)

concordant with the reference  spectrum

conforms

assay

98.5~101.5%

99.7%

PH

5.5~7.0

5.8

Specific rotation[a]D25

-29.4°~-32.8°

-31.3°

Chloride(Cl)

≤0.05%

<0.05%

Sulfate(SO4)

≤0.03%

<0.03%

Iron(Fe)

≤30ppm

<30ppm

Heavy metals(Pb)

≤15ppm

<15ppm

Loss on drying

≤0.30%

0.11%

Residue on ignition

≤0.10%

0.05%

Organic volatile impurities

meets the requirements

conforms

Conclusion

 

Passed test according to the Standard of USP24.


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Company Name: Qingdao Dacon Trading Co., Ltd

Registered Address:No. 519, Workshop On 5/F, 1 Hancheng Rd., Free Trade Zone, Qingdao, Shandong, China (Mainland)

Legal Representative/CEO: Ms. Shuming Kang

Registration No.: 91370220747213098M

86-532-80865267
86-532-80865298
Mr. Weishun Yang
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