Malachite green (a carcinogen) found in Chinese seafood

This is from Canada,I googled but found nothing from the USA.

Malachite green is used in some countries such as China, to prevent infections in crowded fish ponds. Ottawa has banned the practice and doesn't allow seafood treated that way to be sold in Canada.

Chu took his concerns to Canada's top food police -- the Canadian Food Inspection Agency -- but says he didn't get any real answers. "I think there's something more insidious there. That somehow Canada has not been looking at our food safety in as careful a manner that we as Canadians hoped they would be."

In an interview with W-FIVE, the CFIA tells Alan Fryer that Canada now tests a sample from every shipment of farmed fish from China.

We decided to put those seemingly rigorous standards to the test -- by buying and testing our own fish from a popular Toronto supermarket. The tested fish was found to be contaminated with malachite green.
http://www.ctv.ca/servlet/ArticleNews/story/CTVNews/20071025/WFIVE_chinafood_071027/20071027?hub=WFive

"The chemical known as malachite green does not actually contain the mineral malachite — the name comes from the similarity of color."

Malachite green, also called aniline green, basic green 4, diamond green B, or victoria green B, IUPAC name:4-<(4-dimethylaminophenyl)-phenyl-methyl>-N,N-dimethyl-aniline is a toxic chemical primarily used as a dye. When diluted, it can be used as a topical antiseptic or to treat parasites, fungal infections, and bacterial infections in fish and fish eggs. It is also used as a bacteriological stain

However, in 1992 in Canada, it was determined that there is a significant health risk to humans who eat fish contaminated with malachite green. The chemical was classified a Class II Health Hazard because it was found to be toxic to human cells and might cause liver tumor formation. However, due to its ease and low cost to manufacture, it is still used in certain countries with less restrictive laws for non-aquaculture purposes. In 2005 eels and fish imported from China and Taiwan were found in Hong Kong with traces of this chemical. Also, in 2006 the United States Food and Drug Administration (FDA) detected malachite green in seafood imported into that country for human consumption by China, where the substance is also banned for use in aquaculture. In June 2007, the FDA blocked the importation of several varieties of seafood due to continued malachite green contamination. <1><2> The substance has been banned in the United States since 1983 in food-related applications.

Cases involving malachite green detected in fish

An investigation by the Hong Kong Government Labs (Hong Kong Health Department) in 2005 revealed freshwater fish, crabs and other aquaculture products in China had small traces of malachite green. Later, saltwater fish from China and Taiwan were also found to contain this toxin. However, Taiwan officials asserted this discovery to be unconfirmable, stating that malachite green has long been banned in Taiwan.<3><4>

(emphasis added)

http://en.wikipedia.org/wiki/Malachite_green

Edit1: subjunctive title
Edit2: 2005 investigation

"But the connection to China isn't always obvious to the average consumer. Much of what's in Canadian kitchens -- such as cereals and apple juice -- sold as "Product of Canada" or "Product of the U.S." is processed in China or contain ingredients from China.

Under Canadian law, the ingredients can come from anywhere in the world and still get a "Product of Canada" label. That's because "Product of Canada" only means that at least 51 per cent of manufacturing costs were incurred in Canada."

it to control disease.

I have NO plans to eat any meat or fish from China in the future. This sort of crap is why.