Food and
feed additives are substances that are added to food to maintain or improve the
safety, freshness, taste, texture, or appearance of food or feed. Some food additives
have been in use for centuries for preservation – such as salt (in meats such as bacon
or dried fish), sugar (in marmalade), or sulfur dioxide (in wine). Food additives can
be derived from plants, animals, or minerals, or they can be synthetic. They are added
intentionally to food to perform certain technological purposes which consumers often
take for granted. Feed additives are products used in animal nutrition to achieve an
effect on the feed itself, on the animals, on food products obtained from the animals
consuming the feed additive, or on the environment. For instance, feed additives are
used to enhance flavor of feed, meet the need for certain nutrients or increase the
performance of animals in good health. They are used in feed for food-producing animals
and in pet food. Feed additives include technological additives, sensory additives,
nutritional additives, zootechnical additives, coccidiostats, and histomonostats.

The <a href="http://www.nt-aac.com/organic-chemical-raw-materials/"
target="_self">organic chemical raw materials are petrochemicals made of petroleum
and natural gas, and the industries of various organic chemical products are produced
or fractionated by the raw material gas after coal gasification and the coal tar
recovered by dry distillation. The direct raw materials used in basic organic chemicals
mainly include hydrogen, carbon monoxide, aliphatic hydrocarbons (methane, ethylene,
acetylene, propylene, aliphatic hydrocarbons above C4), aromatic hydrocarbons (benzene,
toluene, xylene, ethylbenzene). Organic raw materials are widely used and can be
divided into three aspects: one is the raw material used to produce polymer chemical
products, that is, the monomer for polymerization; the other is used in other organic
chemical industries, including raw materials for fine chemical products; Used in
solvents, refrigerants, antifreeze, gas adsorbents, etc. Basic organic chemicals are
the basis for the development of various organic chemical products and are a major
component of modern industrial structures.