C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 309/32 (2006.01) C11D 3/42 (2006.01) D06L 3/12 (2006.01)
Patent
CA 2099297
Case 2-19142/A Abstract of the disclosure Hydrates of the disodium salt or dipotassium salt of 4,4'-bis(2-sulfostylyl)biphenyl The present invention relates to novel hydrates of the disodium salt or dipotassium salt of 4,4'-bis(2-sulfostyryl)biphenyl characterised by their water of hydration content, to the crystal forms associated therewith, characterised 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.
Burkhard Andreas
Ehlis Thomas
Franke Karlheinz
Geoffroy Andre
Marti Erwin
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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