L-Tryptophan, USP28


Weight: 200g
Price:
Sale priceR$ 255,64

Description

Product Name: L-Tryptophane
CAS No.: 73-22-3
EINECS No.: 200-795-6
Chemical Formula: C11H12N2O2
Molecular Weight: 204.228
Other names:
2-Amino-3-(1H-indol-3-yl)propanoic acid;
Tryptophan or (2S)-2-amino-3-(1H-indol-3-yl)propanoic acid
Melting Point: 283ºC

Specification:

Appearance:

White crystalline powder

 

Assay:

98.5% to 101.5%

 

Specific rotation [α]D20:

- 29.40 to - 32.80

 

Loss on drying

0.30% max

 

PH:

5.5 to 7.0

 

Residue on ignition [sulfated]:

0.10% max

 

Chloride [Cl-]:          

0.05% max

 

Sulfate [SO4]:

0.03% max

 

Iron [Fe]:

30ppm max

 

Heavy metals [Pb]:

15ppm max

 

Arsenic [As2O3]:

1ppm max

 

Chromatographic purity:

Individual impurity not more than 0.5%

Total impurities not more than 2.0%

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