Hello, I'm a specialist in the field of food additives and ingredients. I can help you understand what Red 40 and Yellow 5 are.

Red 40, also known as Allura Red AC or Food Red 17, is a synthetic food dye. It is commonly used to add a vibrant red color to various products, including beverages, baked goods, and candies. Red 40 is derived from coal tar, which is a byproduct of coal processing.

Yellow 5, also known as Tartrazine, is another synthetic dye used in the food industry to provide a yellow hue to products. It is often found in soft drinks, candies, and pharmaceuticals. Like Red 40, Yellow 5 is also derived from coal tar.

Both additives are regulated by the Food and Drug Administration (FDA) in the United States and are approved for use in the food supply, provided they are used within the specified limits. However, there has been some controversy and debate over the safety of these dyes, with some studies suggesting a potential for allergic reactions or other health issues in certain individuals.

Now, let's translate that into Chinese:

你好，我是食品添加剂和成分领域的专家。我可以帮助你了解什么是胭脂红40和柠檬黄5。

胭脂红40，也称为Allura Red AC或食品红17，是一种合成食品色素。它通常用于为各种产品添加鲜艳的红色，包括饮料、烘焙食品和糖果。胭脂红40来源于煤焦油，这是煤炭加工的副产品。

柠檬黄5，也称为酒石黄，是另一种在食品工业中使用的合成染料，用于为产品提供黄色。它经常出现在软饮料、糖果和药品中。像胭脂红40一样，柠檬黄5也来源于煤焦油。

这两种添加剂在美国由食品药品监督管理局（FDA）监管，并被批准在食品供应中使用，前提是它们在规定的限制范围内使用。然而，围绕这些色素的安全性存在一些争议和辩论，一些研究表明，某些个体可能存在过敏反应或其他健康问题。

read more >>

The three most widely used dyes, Red 40, Yellow 5, and Yellow 6, are contaminated with known carcinogens, says CSPI. Another dye, Red 3, has been acknowledged for years by the Food and Drug Administration to be a carcinogen, yet is still in the food supply.read more >>