Crystals of laquinimod sodium, and process for the manufacture thereof
First Claim
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1. A mixture of crystalline laquinimod sodium particles wherein 10% or more of the total amount by volume of the laquinimod sodium particles have a size of greater than 40 microns, having a bulk density of at least 0.2 g/mL or a tapped density of at least 0.4 g/mL.
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Abstract
Disclosed is a process for the preparation of laquinimod sodium which removes the impurities after the salt formation step, thus resulting in crystals of higher purity as well as crystals having improved crystalline characteristics.
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Citations
44 Claims
- 1. A mixture of crystalline laquinimod sodium particles wherein 10% or more of the total amount by volume of the laquinimod sodium particles have a size of greater than 40 microns, having a bulk density of at least 0.2 g/mL or a tapped density of at least 0.4 g/mL.
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9. The mixture of 8, having a tapped density of at least 0.5 g/mL.
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10. The mixture of 7, having a tapped density of less than 0.7 g/mL.
Specification