5,6-Dimethoxy-2-(pyridine-4-yl)methylene-indan-1-one

Item

Specifications

Results

Appearance

White crystalline powder

White crystalline powder

Assay (On the dried basis)

≥99.0%

99.48%

Melting point

136℃~140℃

137.6℃~139.1℃

Loss on drying

≤1.0%

0.35%

Specific optical rotation

-16°—-17°

-16.42°

Residue on ignition

≤0.1%

0.04%

Heavy metals

≤20ppm

Accords with the specification

Clarity of the solution

Clear and colourless or pale yellow solution

Accords with the specification

Conclusion

Meeting the requirements of the In-house.