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L-Tryptophan Price:¥

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Detailed content Specification parameter Product packaging


Items


Specifications


Result


Appearance


White to pale yellow crystalline powder


Conforms


Assay


≥98.5%


99.5%


Specific Rotation [α]D20°C


-29.4°~ -32.8°


-30.9


Loss on Drying


≤0.3%


0.12%


Residue on Ignition


≤0.1%


Conforms


PH


5.5 ~ 7.0


Conforms


Heavy metals (as Pb)


≤20 ppm


Conform


Iron(Fe)


≤30ppm


Conform


Sulphate (SO4)


≤0.03%


Conform


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