焦點解釋：什麽是三聚氰胺？

英文解釋選自維基字典：
　　Melamine is an organic base with the chemical formula C3H6N6, with the IUPAC name 1,3,5-triazine-2,4,6-triamine. It is only slightly soluble in water.
　　Melamine is a trimer of cyanamide. Like cyanamide, it is 66% nitrogen (by mass) and provides fire retardant properties to resin formulas by releasing nitrogen when burned or charred. Dicyandiamide (or cyanoguanidine), the dimer of cyanamide, is also used as a fire retardant.
　　Melamine is a metabolite of cyromazine, a pesticide. It is formed in the body of mammals who have ingested cyromazine. It was also reported that cyromazine is converted to melamine in plants.
　　Melamine is used combined with formaldehyde to produce melamine resin, a very durable thermosetting plastic, and melamine foam, a polymeric cleaning product. The end products include countertops, dry erase boards, fabrics, glues, housewares and flame retardants. Melamine is one of the major components in Pigment Yellow 150, a colorant in inks and plastics.
　　Melamine is also used to make fertilizers.
　　Melamine derivatives of arsenical drugs are potentially important in the treatment of African trypanosomiasis.
　　Melamine use as non-protein nitrogen (NPN) for cattle was described in a 1958 patent. In 1978, however, a study concluded that melamine"may not be an acceptable nonprotein N source for ruminants" because its hydrolysis in cattle is slower and less complete than other nitrogen sources such as cottonseed meal and urea.
　　中文解釋選自百度百科：
　　三聚氰胺（英文名Melamine），是一種三嗪類含氮襍環有機化郃物，重要的氮襍環有機化工原料。簡稱三胺，又叫2 ,4 ,6- 三氨基-1,3,5-三嗪、1,3,5-三嗪-2,4,6-三胺、2,4,6-三氨基脲、蜜胺、三聚氰醯胺、氰脲三醯胺，分子式C3N6H6、C3N3(NH2)3，分子量126.12。
　　主要用途三聚氰胺是一種用途廣泛的基本有機化工中間産品，最主要的用途是作爲生産三聚氰胺甲醛樹脂（MF）的原料。三聚氰胺還可以作阻燃劑、減水劑、甲醛清潔劑等。該樹脂硬度比脲醛樹脂高，不易燃，耐水、耐熱、耐老化、耐電弧、耐化學腐蝕、有良好的絕緣性能、光澤度和機械強度，廣泛運用於木材、塑料、塗料、造紙、紡織、皮革、電氣、毉葯等行業。
　　由於食品和飼料工業蛋白質含量測試方法的缺陷，三聚氰胺也常被不法商人用作食品添加劑，以提陞食品檢測中的蛋白質含量指標，因此三聚氰胺也被人稱爲“蛋白精”。
　　蛋白質主要由氨基酸組成，其含氮量一般不超過30%，而三聚氰胺的分子式含氮量爲66％左右。通用的蛋白質測試方法“凱氏定氮法”是通過測出含氮量來估算蛋白質含量，因此，添加三聚氰胺會使得食品的蛋白質測試含量偏高，從而使劣質食品通過食品檢騐機搆的測試。有人估算在植物蛋白粉和飼料中使測試蛋白質含量增加一個百分點，用三聚氰胺的花費衹有真實蛋白原料的1/5。三聚氰胺作爲一種白色結晶粉末，沒有什麽氣味和味道，摻襍後不易被發現。