COPENHAGEN (REUTERS) - Following a string of food safety scandals, Chinese tourists visiting Copenhagen have this year stocked up on Danish-made organic infant milk formula, prompting some supermarkets to limit the number of cans each customer can buy.

More conventional exports are strong too. Arla Foods, one of Europe's biggest dairy companies, says Chinese demand for premium products and high food safety standards in Denmark have helped it almost double its sales to China this year.

Food safety has been an important issue in China since a 2008 scandal killed six infants who had been fed milk powder that had been adulterated with the toxic melamine, normally used to make plastics.

Milk powder and long-lasting UHT milk account for most of Arla's exports to China but its organic infant formula is gaining popularity among Chinese consumers, said Arla Foods' chief executive Peder Tuborgh.

"We found a niche in the market for organic infant formula that didn't exist even two years ago but it's starting to unfold and that's part of what drives the revenue growth," Tuborgh said in an interview.

The increase comes after French food company Danone said sales of baby milk formula in China rose strongly in the third quarter.

Arla and Danone are facing fierce competition in the China baby food market from Nestle and Reckitt Benckiser.

"China is probably the most competitive dairy market in the world," Tuborgh said.

Exports to China are set to reach 100 million euros (S$159 million) this year, up from 55.9 million in 2016 and 51.7 million the year before, he said. He expects growth rates of 25 to 30 per cent in the coming years.

As a result of higher demand, Chinese visitors to Denmark have raided supermarket shelves for locally-made organic infant milk formula, leaving some retailers scrambling to supply domestic consumers.

In October, Denmark's biggest supermarket chain Coop was forced to limit the amount of milk formula to 7kg (12 cans) per customer, after seeing some Chinese shoppers literally empty their shelves buying more than 40kg.

Arla's organic infant milk powder can fetch three to four times the price in China compared to the price in Denmark.