Name of product: L-tryptophan

Expiry date: 2 Years

TEST ITEMS

TEST SPECIFICATIONS

Appearance

White to yellowish microcrystalline powder

Assay (dried basis)/%

≥98.0

Loss on drying/%

≤0.5

Crude ash /%

≤0.5

PH value (1 in 100 aqueous soln)

5.0-7.0

Lead (mg/Kg)

≤5

Specific rotation [α]D20

-29°~ -32.8°

Conclusion

CONFIRM