The vast majority of China`s livestock feed producers have complied with a ban on using the chemical melamine, but banned additives are still getting through, Agriculture Minister Sun Zhengcai said Monday.

BEIJING, Oct 8, 2008 (AFP) - China announced Wednesday limits for how much melamine its dairy products can contain, seeking to curb the use of the chemical which has killed four children and sickened 53,000.

BEIJING, Sept 17, 2008 (AFP) - The industrial chemical melamine has been found in milk products produced by 22 Chinese dairy companies in an unfolding scandal that has killed three babies and sickened more than 6,000.

Following are key facts on melamine:

WHAT IT IS: An organic chemical rich in nitrogen.

BEIJING, September 12, 2008 (AFP) - The Chinese firm whose baby formula is blamed for killing one infant and sickening dozens has accused dairy suppliers of adding a chemical to their milk to up protein content, state media said Friday.