Pyrroloquinoline quinone disodium salt crystal and method for producing the same
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsKazuto Ikemoto, Hitoshi Sakamoto
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Abstract
An object of the present invention is to provide a novel pyrroloquinoline quinone disodium crystal having excellent dispersibility in solvents and excellent permeability through skin, and a method for producing the pyrroloquinoline quinone disodium crystal with high efficiency. According to the present invention, provided are a novel pyrroloquinoline quinone disodium crystal which is produced by drying a crystal produced under specified conditions through a drying means such as lyophilization, ambient drying and vacuum drying, and a method for producing the pyrroloquinoline quinone disodium crystal.
Claims7
A pyrroloquinoline quinone disodium crystal, comprising:
- water at a content of 7% by weight or less, and
- a pyrroloquinoline quinone disodium crystal in Crystalline Form 1 or Crystalline Form 2,
- wherein
- the Crystalline Form 1 has 2θ angle peaks at 11.4±0.4, 13.5±0.4, 18.0±0.4, 18.7±0.4, 26.0±0.4, and 28.5±0.4° obtained by powder X-ray diffraction using a Cu Kα radiation, and
- the Crystalline Form 2 has 2θ angle peaks at 8.7±0.4, 11.5±0.4, 12.0±0.4, 17.4±0.4, and 18.7±0.4° obtained by powder X-ray diffraction using a Cu Kα radiation.
Dependencies are inferred from the claim text.