DL-Tryptophan

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DL-Tryptophan
CAS RN: 54-12-6
 

Solubility in water	Colorless & clear (c=1)
Loss on drying	Not more than 0.3%
Residue on ignition (as sulfate)	Not more than 0.1%
Chloride (Cl)	Not more than 0.02%
Sulfate (SO4)	Not more than 0.03%
Heavy metals (as Pb)	Not more than 20ppm
Iron (Fe)	Not more than 20ppm
Ammonium (NH4)	Not more than 0.02%
Arsenic (As2O3)	Not more than 1ppm
Other amino acids	Not detected by T.L.C.(The spotted amount, 10μg)
Assay	98.5%～101.0%

 




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