Dialdehyde starch

Dialdehyde starch (CAS 9047-50-1) is a chemically modified starch produced by periodate oxidation, which introduces aldehyde groups along the polymer backbone. These reactive groups enable cross-linking with proteins, cellulose, and other polymers.

This chemical structure makes it a functional binder and cross-linking agent across several industrial sectors. In paper and pulp manufacturing, it improves wet and dry strength by cross-linking cellulose fibers.

This process directly impacts sheet performance and reduces fiber loss during production. Textile finishing operations use it to impart crease resistance and dimensional stability to woven fabrics without relying on formaldehyde-based systems.

In leather processing, it acts as a tanning auxiliary, cross-linking collagen fibers to improve firmness and water resistance in the final hide. Food-grade applications include use as a rheology modifier and texture agent.

It is particularly useful in starch-based formulations where controlled viscosity and gel stability are required. The product is typically supplied as a white to off-white powder with varying degrees of oxidation.

The oxidation level is commonly expressed as the percentage of aldehyde groups per anhydroglucose unit. Technical and food-grade specifications are available, with oxidation levels generally ranging from 20% to 100%.

The specific grade depends on the intended application and required reactivity. Packaging is standard in multi-kilogram bags or bulk quantities suited to industrial procurement volumes for global distribution.