Why are some volumetric flasks brown?

Volumetric flasks. The reason why it is made brown is because there are some medicines in it, and they can't see strong light, so they make it brown to protect from light.

Some volumetric flasks are brown, indicating that the volumetric flask has the function of anti-oxidation, then, the solvent contained in this bottle has more protective effect, generally speaking, the brown volumetric flask is more quality than the transparent white glass bottle, the brown volumetric flask is better than the transparent white glass bottle, more versatile, and should be more expensive on the **.

Some volumetric flasks are brown in color, and the main reason is that these brown volumetric flasks are used to store medicines protected from light. Because it is necessary to avoid light, this brown pavilion is used to accommodate this drug.

Because the brown bottle has a better light absorption effect, the light is not easy to penetrate, which can effectively avoid the decomposition of the drug, thereby prolonging the shelf life.

This is because these volumetric flasks are used to hold liquids that are afraid of light. Liquids that are not afraid of light can be filled with white volumetric flasks, and those that are afraid of light should be filled with dark brown volumetric flasks.

Because some drugs are easy to decompose when exposed to light, such as silver nitrate. Therefore, these drugs that are easy to decompose when they see light have to be packed in brown volumetric flasks.

Volumetric flasks generally come in two colors, one is white and the other is brown. The white volumetric flask is generally filled with ordinary solution, and the brown volumetric flask is generally filled with a solution to be stored in the dark, such as: silver nitrate, potassium iodide, etc.

Because some solvents decompose easily when exposed to light, these solvents that decompose easily are bottled in brown volumetric bottles.

Why are some volumetric flasks brown? I think in general, some volumetric flasks are brown, and maybe the contents of the flask may be afraid of sunlight, so he put the volumetric flask in brown.

I don't think it's hard to understand why some volumetric flasks are brown, for example, if you like to use brown bottles for dry red wine, just to avoid the light. Good to save.

Some bottles are brown mainly because they are used to hold substances that are protected from light.

Brown volumetric flask use: suitable for scientific research, colleges and universities, medical and health and industrial and mining enterprises and other units of the laboratory, for the dilution of known concentration of solutions, the preparation of standard solutions, or for the precision measurement of liquids, brown volumetric flasks are suitable for dilution or preparation of solutions that are easy to deteriorate and decompose when exposed to light. The purpose of the brown reagent bottle is:

Protected from light, generally seen in the light, easy to decompose, volatilize, sublimate or react substances should be stored in brown reagent bottles, such as: iodine, silver nitrate.

Silver bromide, concentrated nitric acid.

Dilute nitric acid, chlorine water, bromine water, iodine water, silver ammonia solution, etc.

Some chemicals need to be kept out of the dark, so brown bottles are needed!

With what? Why? In the case of some volumetric flasks, the gray-brown ones are irradiated by the ultraviolet rays of the sunlight, and the liquid of the kind of the food such as the volumetric pencil case and the kind of nonsense food are all in it.

Some solvents need to be protected from light, so choose brown volumetric flasks.

The volumetric flask needs to be colored according to what it contains.

BrownVolumetric flasks. The difference between it and the ordinary volumetric flask is: brown bottleLight transmittanceSmall, usually filled with light easy to decompose agents, white volumetric flasks are usually filled with some agents that are not easy to volatilize and decompose.

Precautions for the use of volumetric flasks:

1. The solute cannot be dissolved in the volumetric flask, and the solute should be placed in a beaker.

Dissolve and transfer to a volumetric flask.

2. The total amount of solvent used to wash the beaker should not exceed the marking line of the volumetric flask, and once exceeded, it must be re-formulated.

3. The volumetric flask cannot be heated. Be careful not to grasp the bottle with your hands; The hot solution should be cooled to room temperature before being injected into the volumetric flask, otherwise it may cause volume errors.

4. The volumetric flask can only be used to prepare the solution, and the solution cannot be stored for a long time or for a long time, especially the alkaline solution, which will erode the glass and make the bottle stopper stick and cannot be opened. Sleepy filial piety.

5. The volumetric flask should be washed in time after use, the cork should be plugged, and a paper strip should be clamped between the stopper and the bottle mouth to prevent the cork from sticking to the bottle mouth.

6. The volumetric flask can only prepare a certain capacity of solution, but generally retains 4 significant digits (such as: Wang Qiran, which cannot be estimated and changed because the solution exceeds or does not reach the scale mark, and can only be reconfigured.)

7. Before using the volumetric flask, check it first to see if the volume of the volumetric flask is consistent with the requirements. If you are preparing a solution of substances that are easy to decompose when you see light, you should choose a brown volumetric flask.