防腐剂
The term “preservatives” refers to the functional name for a wide variety of compounds that help slow or prevent bacterial …Continued
Use the search box to find information on the chemicals that are essential to the products you use every day.
防腐剂are added to food to打击腐败caused by bacteria, molds, fungus, and yeast. Preservatives can keep food fresher for longer periods of time, extending its shelf life. Food preservatives also are used to slow or prevent changes in color, flavor or texture and delay rancidity.
防腐剂are used commonly in medicines such as acetaminophen, insulin and cough syrup to help prevent microbial contamination. Simply,preservatives help prevent the growth of microorganisms, particularly bacteria and fungi, which may cause disease or infection.
防腐剂in cosmeticsand personal care products help prevent contamination and the growth of harmful bacteria in products ranging from sunscreens, lotions and shampoos to cleansers, toothpaste and makeup.
Antimicrobial preservativesin cosmetics and personal care products help prevent the growth of molds, yeasts and bacteria,guardingagainst contamination that can cause irritation or infections.Antioxidant preservativesalso can help keep personal care products from spoiling by suppressing reactions that can occur when certain ingredients in a cosmetic or personal care product combine with oxygen in the presence of light, heat and some metals.
Wood treated with preservatives can be used to build telephone poles, road signs and marine pilings as well as decks, play structures and raised garden beds.
The use of preservatives in food products isstrictly studied, regulated and monitoredby the U.S. Food and Drug Administration (FDA). Federal regulations require evidence that food additives are safe for their intended use.
防腐剂in foods are subject toongoing safety reviewby FDA as scientific understanding and methods of testing continue to improve.
In contrast to foods, with the exception of color additives,cosmetic products and ingredients including preservatives do not need FDA premarket approval. FDA can take action against products on the market that are not in compliance with the law; for example, if the product contains any poisonous or harmful substance. FDA monitors companies that conduct product recalls and can request a product recall if the company does not issue a recall on its own.
防腐剂in medicines and drugs are generally considered to be “inactive ingredients” by FDA. Inactive ingredients (such as dyes, preservatives, and flavoring agents) are parts of a drug or medicine that do not affect the therapeutic action of the active ingredients.食品及药物管理局的Inactive Ingredient Databaseprovides information on inactive ingredients present in FDA-approved drug products.
FDA, the Centers for Disease Control and Prevention (CDC), the National Institutes of Health (NIH) and other federal agencies regularly monitor and conduct research onvaccine safety.
防腐剂are added to food to fight spoilage caused by bacteria, molds, fungus, and yeast. Preservatives also help keep food fresh for longer periods of time.
防腐剂can be made of “natural” chemicals such assaltoralcohol. They can also be man-made, or synthetic chemicals. “Natural” or “organic” chemicals arenot necessarily healthierthan synthetic or man-made chemicals. In fact, artificial preservatives such as sodium nitrate, sodium benzoate and propionate have long been used in food preparation because they are effective in small amounts.
Today, food and color additives, including preservatives, are more strictly studied, regulated and monitored than at any other time in history, andFDA has the primary legal responsibility for determining their safe use. To add a new food preservative to the market, or before using a substance already approved for one use in another application, the manufacturer or other sponsor must obtain approval from the U.S. Food and Drug Administration (FDA) and provide scientific data demonstrating that the substance is safe for its intended use.
防腐剂are added to foods to help prevent or slowspoilage due to bacteria, molds, fungi or yeast, as well as to slow or prevent changes in the food’s color, flavor or texture, delay rancidity, and maintain freshness.
防腐剂kill, prevent, or slow the growth of microorganisms, particularly bacteria and fungi, which may cause disease or infection. Studies have found that there is没有令人信服的科学证据that the low dose of thimerosal as a preservative in vaccines causes harm, except for possible minor reactions like redness and swelling at the injection site. The FDA offers information about the safety of thimerosal.
In acidic drinks like sodas and fruit juices,sodium benzoateis an antimicrobial preservative and flavoring agent that can inhibit the growth of bacteria, mold and yeast. It is found naturally in cranberries, prunes, apples and some spices. Sodium benzoate can also be used to lubricate pills and tablets formedicines.
Nitrites (such assodium nitrite or sodium nitrate) are preservatives used to prevent bacteria in lunch meats and other cured meats. In a typical person’s diet,80 percent of nitrites come from vegetablessuch as spinach, radishes and lettuce. Nitrites also deter botulism to some degree. FDA has stated that the food preservative sodium nitratecan be safely usedin or on specified foods.
Sulphitessuch as sulphur dioxide are types of salts widely used for theirpreservative and antioxidant properties. In food, these are found predominantly in dried fruits and vegetables, soft drinks and alcoholic beverages.
Parabensare preservatives that help to protect against the growth of bacteria, fungi and yeast. Parabens are derived from para-hydroxybenzoic acid (PHBA), which occurs naturally in many fruits and vegetables. According to FDA, there is “no reason for consumers to be concerned about the use of cosmetics containing parabens.”
Formaldehydeis a simple chemical compound made of hydrogen, oxygen and carbon. All life forms – bacteria, plants, fish, animals and humans – naturally produce formaldehyde. As a preservative, formaldehyde is well known for its anti-bacterial properties, helping to prevent the growth of bacteria and other pathogens and extend shelf life when it is added as a product ingredient.
