Estriol Hormone powder CAS NO 50-28-2

Description

White or almost white, odorless, crystalline powder

White crystalline powder

Identification

1)

Infrared absorption spectrophotometry should be consistent with the reference

Conforms

2)

By UN-Vis spectrophotometry, the product solution and reference substance solution of the maximum and minimum absorption wavelength consistent

Conform

Specific Optical rotation

+54°~+62°

+58°

Clarity of solution

Solution completely clarified and no insoluble solid

Conforms

Related substances

Total impurities≤2.0%

1.5%

Loss on drying

≤0.5%

0.10%

Assay

97.0%~102.0%  (on the dried basis)

99.7%

Residual on ignition

≤0.1%

0.04%

Residual solvents

Acetone≤5000ppm

59ppm

Conclusion

The product complies with specification in USP37

Storage

Preserve in tight, airtight save

Remarks

Particle size

D(0.9)<10μm