Items

Standard

Results

Characters

A yellow crystalline powder

A yellow crystalline powder

Identification

In accordance with the

requirement of BP

Positive reaction

PH

2.3 to 2.9

2.51

Specific optical rotation

-188º to –200º

-189.1º

Absorbance

270 to 290

276

Light-absorbing impurities

430nm  A≤0.50

490nm  A≤0.20

0.18

0.15

Related substances

Complies with

Complies with

Heavy metals

≤0.005%

＜0.005%

Water

≤2.0%

1.03%

Sulphated ash

≤0.5%

0.03%

Assay

95.0  to  100.5%  (BP)

95.0  to  102.0%  (EP)

97.9%

Conclusion

this above certificate of analysis comes up to BP2000