heard a lot about this matter, as formalin.What is the chemical compound?It is often called formol.It is a solution of formaldehyde (36,5-40%).As the stabilizer, it contains methyl alcohol (4-12%).This colorless transparent liquid has a pungent odor.It can be mixed with alcohol and water in any proportions.
Formalin: what is it?
This material is most commonly used as a disinfectant.Its solutions (0.5-1%) was used for washing the skin with severe sweating (legs, armpits) and bromidrosis (pungent smell of sweat).Formalin effectively reduces the secretion of the glands of the epidermis, but it can not be used on a daily basis.In some cases, it is used for irrigation (at a concentration of 0.05%), washing tonsil crypt (0.25%).This substance is a drug composition "Lysoform" "Formidron" "Ointment formalin", "Paste Teymurova".
Side effects when using this solution: irritation and over-drying of the skin which disappears when its lubrication fat cream or vegetable oil.Formalin, the use of which is contraindicated in inflammation or irritation of the epidermis, can be used only after their elimination.
for disinfection of medical instruments and things patients also use this solution.Application in this case envisages only 0.5% formalin.What is this medicine?For medical use produced only 10% solution in glass vials of 100 ml.Store formalin in well-closed container in a dark place at a temperature of not less than 9˚S.This substance is considered to be toxic to humans and animals.
chemical composition of formalin
How is formaldehyde?The formula of this substance - CH2O.Formaldehyde (formic aldehyde acid), which is a colorless gas with a suffocating odor, while cooling to -21 ° C is transformed into a clear liquid.Its melting point is -92 ° C. The oxidation of it is converted into formic acid.Formaldehyde is produced by exposure to atmospheric oxygen to methanol in the vapor form in the presence of catalysts.Of these, a particularly productive turned silver, although the industry uses more available copper.The obtained distilled water accumulates, resulting in formalin.It may contain impurities of acetone, acetic acid or formic acid.Evaporation of formalin residue obtained dense mass of polymers which are insoluble in cold water.
Properties formalin
This substance causes irreversible changes in the proteins of protoplasm.At the same time it is necrotizing and mummified tissue.Under the influence of this solution to the bacterial cells is denatured their proteins.The 5% formol for 0.5 hours killed spore mushrooms.Under the influence of formalin hemoglobin becomes methemoglobin (oxidation product of poisons).For prolonged storage in a cold room, the solution becomes cloudy.This forms a whitish sediment - paraformaldehyde.
use formaldehyde solution
Formalin is used as a convenient source of formaldehyde used in the production of polyvinyl formal.It is also indispensable as an antiseptic to disinfect the premises, tools, clothing, tanning raw hides.It is used for embalming organic substances (and organs).Formalin, the use of which to preserve anatomical specimens no surprise, is also used as a fungicide.Many growers etched with this solution seeds, tubers, roots before planting and sowing.Formalin
which quality is controlled GOST 1625-89 is used in the manufacture of synthetic resins, surfactants, rubber, polyhydric alcohols, and some other derivatives of methylene.A solution of formaldehyde is used in the textile industry.It is used to improve the consumer properties of tissue resistance to shrinkage and wrinkling.In the paper industry formalin improves paper quality and its strength.
precautions when working with formalin
By buying this matter we should not forget how dangerous can be formalin.What kind of precautions?Warranty period of storage of the substance from the manufacturing date - 90 days.Formalin is sold in bottles, cans, drums.A solution of formaldehyde to keep as far away from children.When receiving formalin inside there burning and pain in the stomach and esophagus.After that there is vomiting blood.Also in formalin poisoning occurs coughing, sneezing, hyperthermia mucous eyes, shortness of breath.A person may experience cramps, dizziness, panic attacks.In some cases, formalin poisoning are fatal, which occurs due to respiratory paralysis and asphyxiation.Lethal Dose - 10-15 ml of 35% solution.The smell of formaldehyde in high concentrations can also cause an allergic reaction.
