Can you still use alcohol that has been left for a year, and can you still use alcohol that has expi

First of all, look at the expiration date of the product, if it has been opened, and then ensure that it is sealed, it can be used. Nothing more than for ordinary external disinfection. If it is to be used for injections or scalpels, it is best not to use it if it comes into contact with the inside of human tissues.

Alcohol is not expensive, so it's better to buy it again if you need it.

If it is sealed alcohol, it can be used for a year, if not, it will basically volatilize and have no use value.

If the bottle is unopened and kept sealed and protected from light, it will still be useful during the expiration date.

As long as the alcohol has not evaporated, it can be used, so there is no need to worry.

Sealed and preserved under the alcohol can be used.

If the container is not tightly sealed, the volatile alcohol may only be water!

You'll have to ask a doctor or something.

Now alcohol has become a necessity in every household, some people buy a lot of alcohol at home, but not used up within the expiration date, these expired alcohol can indeed be used, and also has a certain disinfection effect, but the effect will be greatly reduced, and the longer the expiration time, the worse the effect.

If it is usually only used for disinfection on the **, it is better, but if it is to disinfect the wound and use expired alcohol, it may bring a series of adverse consequences.

Generally speaking, doctors do not recommend patients to use some expired alcohol, which not only cannot achieve the effect of disinfection, but also may cause secondary damage to the body.

Since expired alcohol can not be used on the human body, it is still possible to use expired alcohol to clean and disinfect when doing cleaning work, because as long as it is not used on the human body, it is still acceptable to use expired alcohol in the disinfection of some items, but for some places with high disinfection requirements, expired alcohol can not be used.

It is recommended that when you buy alcohol, you can buy it rationally according to your own needs, and don't store a lot of alcohol in a swarm, which will not only cause a waste of resources, but also once the expired alcohol is used, it may not achieve the effect of disinfection, and it is another harm to the body.

Storing alcohol is also a science, do not put alcohol under strong light for irradiation, and do not store alcohol in a transparent glass bottle or plastic bottle, which can easily lead to the volatilization of alcohol, thereby shortening the expiration date of alcohol.

Alcohol that has passed the expiration date will generally reduce the concentration of alcohol due to volatilization, and it cannot achieve a good disinfection effect, so it is not recommended to use expired alcohol for disinfection; It can be used for emergency use when alcohol is not available, but the disinfection effect will be reduced. When storing alcohol, pay attention to seal it well, put it in a backlit, dry environment, and reduce volatilization as much as possible.

Uses of alcohol at different concentrations:

95% alcohol is commonly used to wipe UV lamps. This alcohol is commonly used in hospitals, but in the home it is only used for cleaning camera lenses;

75% alcohol is used for disinfection. This is because 95% alcohol will form a protective film on the surface of bacteria, which is difficult to completely kill bacteria;

40 to 50 percent alcohol prevents pressure sores. For example, when massaging, pour a little 40% to 50% alcohol into the hand and evenly massage the patient's pressure area, which can achieve the purpose of preventing the formation of pressure sores;

25% 50% alcohol can be used for physical depyretics. Patients with high fever can use it to rub their bodies, absorb and take away a large amount of heat with volatile properties, and relieve their symptoms.

If the alcohol has been left for 2 years, it can be used if it is within the expiration date, and it cannot be used if it expires.

Because after the alcohol expires, its disinfection effect will be greatly reduced, at this time, if you wipe with alcohol to disinfect the forest roll or, may not achieve the effect of disinfection, wipe the effect of the drug.

Whether alcohol can be used after a long period of storage depends on the specific situation, for example, when the alcohol is within the expiration date, it can generally continue to be used. If the alcohol has passed its expiration date, or if the active ingredients in the alcohol have completely volatilized, it is not recommended to continue using the alcohol.

The storage time of alcohol in Nagano is whether it can be used, and it is necessary to carry celery according to the specific situation of the alcohol. Generally speaking, alcohol has a certain shelf life, and if the alcohol is within the shelf life, it can usually be used. If the expiration date has passed, the active ingredients in the alcohol will basically evaporate, and it is not recommended to continue using this alcohol.

Alcohol itself is a highly volatile liquid, the longer it is stored, the lower its concentration will become, especially when the lid is completely exposed to the air, the speed of alcohol volatilization will become several times that of the closed state, so it is necessary to pay attention to the container containing alcohol tightly when preserving alcohol.

When storing alcohol, you also need to be careful to keep it in a low temperature, because it can also become volatile in a higher temperature environment. At the same time, it is also necessary to pay attention to the preservation of the alcohol in the dark, otherwise it will also lead to the rapid volatilization of alcohol, which will affect the effect of alcohol.

Expired medical alcohol can no longer be used.

The normal medical alcohol concentration is around 75%. At this time, alcohol can coagulate the proteins of bacteria and play a bactericidal role. However, expired medical alcohol cannot achieve the effect of killing bacteria in terms of concentration and other aspects, so it cannot be used.

70 -75% alcohol is similar to the osmotic pressure of bacteria, which can gradually and continuously infiltrate into the inside of the bacteria before the protein on the surface of the bacteria is not denatured, so that all the proteins of the bacteria are dehydrated, denatured and coagulated, and finally kill the bacteria, when the alcohol concentration is lower than 70%, due to the reduction of permeability, it will also affect the bactericidal ability.

Therefore, the use of 70 -75 alcohol can not only make the proteins that make up the bacteria coagulate, but also do not form a thin film, so that the alcohol can continue to penetrate into the inside, and make it completely disinfected and sterilized. In this suitable range, the higher the concentration, the better the disinfection effect, so 75% has become the most commonly used concentration in hospitals at present.