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Product Name: Oxytetracycline Base

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CAS No: 79-57-2

Melecular Formula: C 22H26N2O8

Molecular Weight: 446.4504


Chemical Structure:


Certificate Of Analysis

Product name

Oxytetracycline Base

Reference

B.P.2011

Shelf Life

4 years

Determination

Specification

Analytic resuIts

Characters

Yellow,crystalline powder.

Conform


Identification

A.Thin-layer chromatography results

Conform

B.A deep red colour develops in sulfuric acid and it becomes yellow when being diluted with water


Conform


C.Reaction of chlorides


Conform

pH

4.5 to 7.5

5.2

Specific optical rotation

-203 to -216

-209℃

Specific absorbance

290 to 310

299

Light-absorbing impurities

430nm

≤0.25

0.12

490nm

≤0.20

0.12

Related substances

Content of impurity peak meets the requirements


Conform

Heavy metals(ppm)

≤50

undefined50

Water(%)

6.0 to 9.0

7.5

Sulfated ash (%)

≤0.5

0.09

Assay(%)

95.0 to 102.0

98.2

Conclusion: It complies with B.P.2011.

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