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Zircote K1000

CAS Number: 23570-56-1
Chemical formula: K2[Zr(CO3)2(OH)2]
Ammonia free crosslinker for paper and paperboard

Zircote K1000 is a highly effective crosslinker for paper and paperboard coatings.
When added to a coating colour it interacts weakly with oxygenated sites, mainly carboxyl or hydroxyl groups, on the binder molecules. The dried coating will exhibit increased water resistance, but not water repellency and the microporous structure of the coating will remain ‘open’.

Zircote K1000 is an odour free, water soluble alkaline solution of stabilised potassium zirconium carbonate containing approximately 20% ZrO2.

Typical properties

Appearance               Clear, colourless liquid
ZrO2 & HfO2*              19-21%
pH                                  11.00 – 11.50
Specific gravity          1.55
Viscosity                       5 cps

HfO2 accounts for approximately 2wt% of this total.


300 kg drums
1500 kg IBCs
Bulk tanker