HYDRATES OF 4,4'-DITRIAZINYLAMINO- 2,2'- STILBENE-2- SULFONIC ACID OR ALKALINE-, ALKALINE EARTH METAL OR AMMONIUM SALTS THEREOF, A PROCESS FOR THEIR PREPARATION AND CONCENTRATED AQUEOUS FORMULATIONS OF FLUORESCENT WHITENING AGENTS CONTAINING THEM

摘要

A hydrate of the 4, 4'-di- triazinylamino-2, 2'-di-sulfostilbene compound of the formula: 214 ו' בניסן התשס" ד - March 28, 2004 in which M and M1 independently represent hydrogen, lithium, sodium, potassium, rubidium, cesium, francium, an alkaline earth metal or ammonium, x is a number within the range of from 1 to 30, and the crystal form of the hydrate (I) being characterised by an X-ray diffraction pattern which is essentially as set out in the Figures 1 to 11 as shown in the specification or a mixture containing one or more of the hydrates of the 4,4'-di- triazinylamino-2, 2'-di-sulfostilbene compound of formula (I).