Item

Specification

Data

Characters

White crystalline powder shiny flakes

White crystals shiny flakes

Identification

(A)

According with IR reference spectrum

Meets the requirement

(B)

Gives positive reaction

Gives positive reaction

(C)

Impart an intense yellow color

Yellow color

Test

Appearance

Not more color than R.S BY6

Solution is clear

Acidity

Add 0.01M NaOH≤2.0ml

0.9ml

Chloride

The limit test for chlorides(200ppm)

Meet the requirement

Heavy metal

Limit test B for heavy metals (20ppm)

not more intense R.S

Sulfate

The limit test for sulfate (600ppm)

not more intense R.S

Loss on drying

≤0.5%(100-105℃)

≤0.22%

Assay

Contains C7H5NaO399.0%-101.0%

99.52%

Conclusion

Comply with BP2002