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Zinc salts

Zinc salts: zinc chloride, - sulphate, - carbonate, phosphate and zinc dimethyldithiocarbamate [(CH2)NCSS]2Zn, have a preservative action on animal hides and skins.

Zirconium tannage

Tannage with a basic salt of tetravalent zirconium, such as zirconyl sulphate, Zr(OH)2SO4 or zirconyl chloride, ZrOCl2.8H2O.

Zwitterion

Ion charged both positively and negatively.

Note: Ion of  glycine : + NH3.CH2COO -

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