Hydrates of the disodium salt or dipotassium salt of 4,4'-bis(2-

Details Hydrates of the disodium salt or dipotassium salt of 4,4'-bis(2- Hydrates of the disodium salt or dipotassium salt of 4,4'-bis(2-

1993-06-23

1995-08-01

Dees, Jose G.

Compositions

Organic luminescent material containing compositions

Optical brightening compositions

562 87, C09K 1106, C07C30901

Patent

active

054378184

ABSTRACT:
The present invention relates to novel hydrates of the disodium salt or dipotassium salt of 4,4'-bis(2-sulfostyryl)biphenyl characterized by their water of hydration content, to the crystal forms associated therewith, characterized by their X-ray diffraction pattern, to processes for the preparation, and to their use for the preparation of concentrated formulations of fluorescent whitening agents.

REFERENCES:
patent: 3984399 (1976-10-01), Woeber et al.
patent: 5076968 (1991-12-01), Fringeli

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