The takeover of Syngenta by ChemChina does not amount to a Chinese nationalization of the Swiss agrichemicals giant, the company's chairman told CNBC.

Earlier on Wednesday, the Swiss agricultural chemicals giant Syngenta said it was to be acquired by ChemChina. Syngenta said the deal, worth over $43 billion, is equivalent to 480 Swiss francs ($471.38) per share. The deal marks the largest ever attempted overseas acquisition by a Chinese firm, Reuters reported.