Yesterday, my mother, who rarely sends me WeChat messages, miraculously sent me a message. I clicked on it and was attracted by the title: Horrible! In 20 minutes, the child's eyes were glistened! You also have this thing at home.

What is it? I opened it out of curiosity, and it turned out to be food desiccant. An 8-year-old child put the desiccant in the snack into a drink bottle out of curiosity. As a result, it "exploded". In just 20 minutes, the eyeball was completely dissolved, resulting in lifelong blindness.

I feel very sad when I see the photos of injured children in the news.

This news instantly took me back to my high school days, and I remembered the two tragedies my chemistry teacher told me, tragedies that really happened.

1

A chemistry teacher often uses desiccant. Before each use, he dries it in the sun and then places it in a place that needs to be kept dry. The effect is always very good. good.

Once, she was in a hurry to use the desiccant and had no time to dry it, so she put the desiccant in the microwave oven, thinking that if she left it for a few seconds, it would definitely dry. When heated, the microwave exploded with a bang.

Fortunately, the teacher was not around and nothing happened, but the microwave oven must have been destroyed.

If the teacher had been around at the time, the consequences would have been disastrous.

2

This is another chemistry teacher. She knows that quicklime will react violently when it meets water. In order to better observe this phenomenon, she filled a large basin of water and put a Chunks of quicklime were thrown in.

As a result, a violent reaction occurred. The moment she threw it down, the "water" splashed up, and her face was ruined because of her so-called curiosity.

Later, when I went to the hospital, I was not optimistic. Plastic surgery could not repair the scars on my face, and it became a permanent pain.

Don’t these two teachers who had the accident know that they might be in danger? They actually knew what would happen next, but a moment of luck took over and the accident happened.

In fact, desiccant is not terrible, and not all desiccants will explode in closed containers. Only by truly understanding it can we eliminate the danger and even make it a helper in our lives.

① Black powder

Name: Iron powder deoxidizer

Ingredient: Reduced iron powder

Reaction phenomenon: large amount + acid + Sealed + ignited, there is a risk of explosion

Usage: snack packaging bags such as bread, peanuts and melon seeds

Packaging: not edible, not microwaveable

Note: Don’t heat it in the microwave!

② Off-white particles (danger!!!)

Name: quicklime desiccant

Ingredients: quicklime

Reaction phenomenon: add water, Produces strong corrosiveness and burns the skin

Add acetic acid with a higher concentration (the concentration of acetic acid is equivalent to 3 to 4 times the concentration of household vinegar), the temperature will rise sharply

Add warm water , edible vinegar, hot and scalding

Usage: Common in seaweed foods

Packaging: not edible, not immersed in water, not open bag, not allowed to be played by young children

Note: Do not put it in water!

③Brown round particles

Name: Silica gel desiccant

Ingredients: Natural mineral ingredients, containing silicon

Reaction phenomenon: When placed in water, it will slowly absorb water, release heat not violently, and is chemically stable

Uses: Clothes, bags

Packaging: Inedible, do not get wet, do not open the bag, keep away from young children< /p>

④Colorless small particles

Name: Silica gel desiccant

Ingredients: Hydrous silica with high microporous structure

Reaction phenomenon : Stable chemical properties, good moisture absorption performance

Uses: Instruments, instruments, leather, luggage, food, textiles, equipment and equipment

This is the only desiccant approved by the EU for drying Can be reused later.

⑤ Attached to the bottle cap

Name: Fiber drying sheet, generally used for coating

Ingredients: Pure natural plant fiber

Reaction: chemically stable

Uses: health products, medicines

The common desiccants are the five above. Most desiccants are not dangerous and can even be used. Repeat use, but be careful when encountering iron powder deoxidizer and quicklime desiccant, especially the second one. If you encounter it, be careful.

It is very dangerous for the quicklime in lime desiccant to enter the eyes. It will continuously release alkaline substances and even cause eyeball perforation in severe cases.

If quicklime enters the eyes, first wipe with a soft cloth or towel to remove the solid quicklime, then rinse with plenty of water for 20 to 30 minutes before sending to the hospital for treatment. When there is no large amount of water source, you can also use cooking oil to clean your eyes first to prevent residual solid quicklime from generating a lot of heat when exposed to water and burning the eye tissue again.

If the quicklime in the lime desiccant is splashed on the skin, it should be wiped off with a dry cloth, wipe it as clean as possible, and then rinse with plenty of cold water.

When quicklime powder is stained, do not immediately rinse it under water, because quicklime will generate heat when exposed to water and is corrosive. Be sure to remove the powder before rinsing!

There are usually some precautions on the desiccant. Parents must pay attention to educating their children and tell them that this product cannot be eaten, opened, or played with!

I hope the tragedy of the boy in the news will never happen again. Don’t let a pack of desiccant ruin your life!

Wujie 365 Daily Update Challenge Camp Daily Update Day 39