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Post published on 01/12/2021

VERISEQ® Nucleation: Better Control of Nucleation in Lyophilization

The lyophilization process consists of three phases: freezing, sublimation, and desorption. The freezing phase impacts the crystal structure that influences the drying rate and contributes to batch uniformity.

In sterile lyophilization, liquid-loaded vials can nucleate over a range of time with different degrees of supercooling, resulting in inter-batch varied ice crystal sizes which impact product resistance to drying.

VERISEQ® Nucleation is a controlled nucleation technology capable of producing sterile cryogenic ice fog and circulating it within a lyophilizer chamber to ensure reliable and prompt nucleation of vial contained pharmaceutical formulations.

As a result, vial to vial variance is reduced, ice crystals are larger, and control of the lyophilization process is enhanced.

In a recent application in India, the lab-scale VERISEQ® controlled nucleation system was installed for a pharmaceutical product which has critical residual moisture and batch uniformity requirements. The controlled nucleation system was retrofit to a lyophilizer at the India facility. During onsite startup, full nucleation was achieved with 2ml, 5ml, 10 ml, 20ml, and 100ml vials.

 

VERISEQ® Ice Fog Nucleation

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