what are preservatives class 8
Preservatives are substances added to food to slow down spoilage and keep it safe and fresh for a longer time, mainly by stopping the growth of germs like bacteria and fungi.
What Are Preservatives? (Class 8 Level)
Think of preservatives as food bodyguards. They protect food from:
- Spoiling quickly
- Getting bad smell or taste
- Becoming unsafe due to microorganisms (bacteria, yeast, moulds)
So, in simple Class 8 language:
Preservatives are substances added to food to prevent it from getting spoiled and to increase its shelf life.
Why Are Preservatives Used?
- To keep food fresh for a longer time during transport and storage
- To prevent food poisoning by stopping harmful microbes
- To reduce food wastage at home and in shops
- To maintain colour, taste, and texture of food for many days
Example:
- Pickles staying good for months
- Jam not spoiling quickly
- Bread not getting mouldy too fast
Types of Preservatives (Class I and Class II)
In many school books and food rules, preservatives are often divided into two main classes.
1. Class I Preservatives – Natural / Traditional
These are mostly natural substances that people have used for centuries at home. Common examples:
- Salt (used in pickles, papad, fish, meat)
- Sugar (in jams, jellies, squashes)
- Vinegar / acetic acid (in pickles, sauces)
- Spices and oils (in pickles and masalas)
Key points:
- Usually come from natural sources
- Generally considered safer and part of traditional methods
- Often do not have strict upper limits in home cooking (but still should not be overused)
2. Class II Preservatives – Chemical / Synthetic
These are chemically made preservatives used mainly in processed and packaged foods.
Common examples:
- Sodium benzoate
- Benzoic acid and its salts
- Potassium sorbate / sorbic acid
- Sulphites (like potassium metabisulphite)
- Nitrates and nitrites (in some meat products)
Key points:
- More powerful and effective at low quantities
- Used in soft drinks, squashes, sauces, bakery items, meat products, etc.
- Must be used only within limits fixed by food safety authorities for safety.
Quick View Table (for Revision)
| Type | Also Called | Examples | Used In |
|---|---|---|---|
| Class I Preservatives | [1][5]Natural / Traditional | [5][1]Salt, sugar, vinegar, spices | [7][1][5]Pickles, jams, home-preserved foods | [1][5]
| Class II Preservatives | [2][5][1]Chemical / Synthetic | [2][7][1]Sodium benzoate, sulphites, sorbates, nitrates | [9][5][1][2]Soft drinks, sauces, processed meat, bakery foods | [5][1][2]
Are Preservatives Safe?
Modern food rules say that chemical preservatives must be used only up to a certain safe limit in foods.
- Food safety agencies fix maximum allowed amounts
- The idea is: enough to protect food, not enough to harm health
- Natural ones (salt, sugar, vinegar) are safer but can cause health issues if eaten in excess (like too much salt or sugar)
Simple Example Story (For Easy Recall)
Imagine you make mango pickle at home:
- You add lots of salt, oil, and spices.
- These act as Class I natural preservatives and keep the pickle safe for months.
Now think of a bottled soft drink in a shop:
- It may contain sodium benzoate , a Class II chemical preservative , to prevent spoilage and to keep it safe while it travels and sits on shelves.
Both are doing the same job: protecting the food.
One-Line Class 8 Answer
If you have to write a short answer in your notebook:
Preservatives are natural or chemical substances added to food to prevent spoilage and increase its shelf life by stopping the growth of microorganisms.
Bottom note: Information gathered from public forums or data available on the internet and portrayed here.