Some 4 million Chinese-made Aqua Dots toys were recalled in the United States because they may contain a chemical which, if swallowed, can lead to a coma or seizures. (www.cpsc.gov)

Millions of Chinese-made toys have been pulled from shelves in North America and Australia after scientists found they contain a chemical that converts into a powerful "date rape" drug when ingested. Two children in the U.S. and three in Australia were hospitalized after swallowing the beads.

With only seven weeks until Christmas, the recall is yet another blow to the toy industry already bruised by a slew of recalls last summer.

In the United States, the toy goes by the name Aqua Dots, a highly popular holiday toy distributed by Toronto-based Spin Master Toys. It is called Bindeez in Australia, where it was named toy of the year at an industry function earlier this year.

Moose Enterprises said Bindeez and Aqua Dots are made at the same factory, which is located in Shenzhen in China's southern Guangdong province. Last week the Chinese government announced an export ban on more than 700 toy factories in the region because of shoddy products.

The company said that the product is distributed in 40 countries but that it was up to the individual countries and distributors to determine whether the product would be pulled.

The toy beads are sold in general merchandise stores and over the Internet for use in arts and crafts projects. They can be arranged into designs and fused when sprayed with water.

Scientists say a chemical coating on the beads, when ingested, metabolizes into the so-called date rape drug gamma hydroxy butyrate. When eaten, the compound made from common and easily available ingredients can induce unconsciousness, seizures, drowsiness, coma and death.

Naren Gunja from Australia's Poisons Information Center said the drug's effect on children was "quite serious ... and potentially life-threatening."

The recall was announced by the Consumer Product Safety Commission on Wednesday several hours after published reports about the recall in Australia.

The two U.S. children who swallowed Aqua Dot beads went into nonresponsive comas, commission spokesman Scott Wolfson said Wednesday. A 20-month-old has recovered completely while the other child, whose age was not known, has been released from a hospital after five days and is recovering, he said.