• Clean Technology
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• v.11 no.1
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• pp.51-56
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• 2005

In this paper we prepared dextrin dialdehyde (DAS) of a different oxidation ratio (aldehyde content) and examined their properties and discussed their tanning mechanism. DAS was produced by reacting dextrin in aqueous medium with periodate ion used in a molar ratio between periodate and glucose of 0.3 to 1.0 at a temperature of 20 to $45^{\circ}C$. Since DAS reacts with amino group, DAS may have tanning property of aldehyde tanning agent (formaldehyde, glutaraldehyde).