Does talc dissolve in water? Scented body talc
Probably, everyone at least once in their life used talc for one purpose or another. However, talc is a mineral or This stone has a number of specific properties. Due to this, it is used both in cosmetology, and for the production of children's skin care products, and in industry (production of paints and varnishes, mechanical engineering, etc.)
The chemical composition of talc
Talc is hydrous magnesium silicate. Its chemical formula is approximately as follows: Mg3Si4O10(OH)2. This composition may have variations, since part of the silicon is replaced in some cases by aluminum, titanium, magnesium - iron or manganese. It should be noted that talc is a mineral that is almost insoluble in water and acids. The amount of impurities depends on the place of its extraction. It has long been mined in Egypt, around China. A high-quality mineral is also found in Poland, the Czech Republic, and France. In Russia, the main deposits are located in the Urals, in the Baikal region, the Krasnoyarsk Territory. This mineral is formed under conditions of metamorphism. The necessary conditions for the formation of talc are a temperature of about 400 ° C, a sufficient amount of water (after the transformation of minerals from rocks rich in iron and magnesium). Due to its characteristics, talc is a mineral of certain rocks. There are several types of talc.
Varieties of the mineral
Depending on the structural features and the presence of certain impurities, the following types of talc are distinguished. Agalite has a parallel (or tangled) arrangement of crystal fibers. Minnesotaite is a mineral that is closer to brown in color (due to the presence of iron, which replaces magnesium). Steatite has a dense structure. It is also called "fat". The presence of nickel in the composition is characteristic of willemseite. The color of this stone is blue or greenish. Talcochlorite has chlorite as an impurity. Often there is noble talc. It is a stone of high density, translucent (or slightly white). Such a mineral lends itself well to processing.
The main physical characteristics of the mineral
This stone has a color from translucent to brown. In powder, its color is white. Talc is the softest mineral, its hardness is one unit. The texture of the material resembles soap, it is slightly greasy to the touch. Elasticity is low, although it bends easily. Talc is a poor conductor of electricity and heat. The mineral adsorbs water well and is non-toxic. Can be sterilized at 160°C (at least one hour).
Talc in medicine
Talc is widely used in the manufacture of medicines. It can be found in many capsules and tablets. However, its concentration in this case should not exceed 30%. Talc is not recommended to be taken orally at elevated body temperature. Also contraindications are diseases of such internal organs as the stomach, spleen. Special care should be taken with preparations containing this mineral, pregnant and lactating women. Talcum stones heated to a certain temperature are used to warm certain areas of the body. Talcum powder is widely used as an external agent. In this case, its concentration is allowed in the range of 90-99%. Talc is a product that perfectly removes excess moisture, thus protecting the baby's delicate skin from irritation. However, it is worth considering this point: prolonged inhalation or use of the powder of this mineral can provoke problems with the respiratory system, changes in tissues.
Features of powder for children
Since talc is a powder that comes into direct contact with the baby's skin, it must be sterilized without fail. In addition to this mineral, the composition includes starch. Also, some manufacturers may use ingredients such as rice starch, corn flour. It is worth avoiding powders that have a pungent odor, a heterogeneous structure. There are the following types of cosmetics: powder powder and liquid talc. The powder has good deodorizing and antiseptic properties. However, when used, the child may inhale some of it. Liquid talc is easy to use, when applied to the surface of the skin, it turns into a powder and absorbs excess moisture. Due to its consistency, talc does not roll into lumps. However, its cost is slightly higher than that of ordinary powder. Experts recommend using talcum powder as a powder from the second month of a child's life. Do not apply it directly to the skin. It is best to pour first on a cotton pad or your own palm, and only then apply with light powdery movements between the folds of the baby's skin.
The use of talc in cosmetology
In almost all eyeshadows, you can find a substance such as talc in the composition. It is a natural adsorbent that allows makeup to stay on the skin longer. Also, this powder is introduced into the composition and face creams. Such cosmetics help the skin to remain soft, smooth, dry. Talc is able to absorb all kinds of chemicals, toxins from the surface of the epidermis. As a result, the skin receives additional protection from damage. Some studies suggest that this mineral can prevent the growth and reproduction of certain bacteria (for example, typhoid fever). Very often, talc is used in the production of dry deodorants. It is also a component of face masks. There are certain requirements for the powder. Firstly, it must be thoroughly cleaned of impurities and microorganisms, and odorless. Secondly, there are also limitations regarding particle sizes. In some cases, they should not be too small so as not to clog the pores of the epidermis.
Talc is what kind of material for modern industry?
In addition to medicine and cosmetology, talc is used in many industries. They cover all kinds of products made of rubber, plastic, rubber to prevent them from sticking together. Talc is also used in the food industry (as a filler, additive). The paper industry also uses this material. Talc-coated paper absorbs ink very well. It is in demand in government agencies (for especially important documents). Very often chalk is replaced with compressed talc. It makes good marks, it is easier to remove from fabrics. Due to its heat and electrical insulating properties, the mineral is used in the ceramic industry (to increase resistance to high frequency radiation).
Talc - Mg3 (OH) 2
Talc composition
The chemical composition of talc.
Contains admixtures of Fe (up to 2-5%), Al, Ca, Mn, Ni.
Origin of name. The name is ancient Arabic. origin. Synonym - steatitis, or wen.
Morphological features. Sheetish and scaly aggregates (talc schist), stellate accumulations, dense thin and hidden flaky rocks (talc stone, etc.), rarely fibrous masses (agalite) or tabular crystals, poorly faceted and easily split into thin plates and leaves.
The color in large-leaved secretions is light green, sometimes white with a yellowish, brownish tint; it can be both colorless and rather densely colored (to brown and dark green). Darker tones are characteristic of dense, contaminated aggregates such as talc stone. The color intensity depends on the content of impurity elements (especially Fe) or the presence of iron hydroxides.
Thin plates of light, iron-free varieties are characterized by transparency or translucency.
The luster of leafy talc is vitreous, with a pearly sheen on cleavage planes; in dense masses - dim shimmering.
Talc properties
- Fat to the touch.
- Cleavage is very perfect; the commissural leaves are flexible and slightly more resilient than those of pyrophyllite.
- Hardness 1 (standard of the lowest hardness in the Mohs scale); easily drawn with a fingernail and cut with a knife.
- Specific gravity 2.6-2.8.
- Inert to acids and alkalis.
Talc deposits
Origin and distribution. Quite widespread. The main rock-forming mineral of rocks called talc stone, steatite, wen, soapstone or pot stone. It is formed during hydrothermal processing of ultramafic rocks, dolomites, or as a result of the metamorphism of magnesium-rich sedimentary rocks.
Companion Minerals:
In deposits associated with ultrabasic rocks - serpentine, carbonates (magnesite, sometimes ankerite, dolomite, calcite), also chlorite, actinolite (less often tremolite), iron oxides (magnetite, hematite), pyrite, residual minerals of the chromite group, tourmaline, apatite, epidote, fuchsite (chrome-containing green muscovite); in deposits associated with hydrothermal alteration or metamorphism of dolomites and dolomitic limestones (marbles) - calcite, dolomite, quartz, sometimes serpentine, thermolite. Deposits in the Urals: Shabrovskoye, Nizhne-Isetskoye and others in the Sverdlovsk region, also in the Miass district of the Chelyabinsk region. 
Stable on the surface of the earth; during hydrothermal alteration, it can pass into a mixture of magnesite and quartz.
diagnostic signs. It differs from aggregates of micas, hydromicas, and clay minerals by very low hardness, pearly luster on perfect cleavage planes in foliar segregations, light color, oiliness to the touch, and also by the association of minerals and rocks. It differs from pyrophyllite with the help of chemical reactions (see pyrophyllite).
Practical value. Iron-free finely ground talc is widely used for medical and hygienic purposes; in perfumery and cosmetics; also as a solid lubricant; in ceramic production. Talc powder is used as a filler in the manufacture of rubber, paper, paints, soap, soft pencils for glass, metal, fabric; in the textile business as a bleaching material for cleaning cotton; for electrical insulators in high voltage networks; in the production of glazes, acid- and alkali-resistant vessels, drainpipes. Talcum stones, especially those containing magnesite, combine refractory, acid and alkali resistance, heat and electrical insulating properties.
Table. Chemical composition and physical properties of talc for the cable industry.
| Index | Norm for talcum grades | Test method | ||||
|---|---|---|---|---|---|---|
| TKV | TK1 | |||||
| 1. Mass fraction of iron compounds soluble in hydrochloric acid, in terms of iron oxide (Fe 2 O 3),%, no more | 0,5 | 0,6 | GOST 19728.4-2001 Talc and talcomagnesite. Determination of iron oxide GOST 19728.4 | |||
| 2. Mass fraction of iron extracted by the magnet, %, no more | 0,02 | 0,04 | GOST 25216-82 Talc and talcomagnesite. Method for determination of iron GOST 25216 | |||
| 3. Mass fraction of calcined residue insoluble in hydrochloric acid, %, not less than | 90 | 90 | GOST 19728.1-2001 Talc and talcomagnesite. Determination of the residue insoluble in hydrochloric acid GOST 19728.1 | |||
| 4. Mass fraction of water-soluble substances,%, no more | 0,2 | 0,2 | GOST 19728.12-2001 Talc and talcomagnesite. Determination of water-soluble salts GOST 19728.12 | |||
| 5. Mass fraction of Cl ions in water extract, %, no more | 0,01 | 0,01 | GOST 19728.13-2001 Talc and talcomagnesite. Determination of chloride ions in water extract GOST 19728.13 | |||
| 6. Mass fraction of SO 4 ions in water extract, %, no more | 0,01 | 0,01 | GOST 19728.14-2001 Talc and talcomagnesite. Determination of sulfate ions in water extract GOST 19728.14 | |||
| 7. Mass fraction of manganese oxide (MnO),%, no more | 0,01 | 0,01 | GOST 19728.9-2001 Talc and talcomagnesite. Determination of manganese (II) oxide GOST 19728.9 | |||
| 8. Mass fraction of copper (Cu),%, no more | 0,003 | 0,003 | GOST 19728.10-2001 Talc and talcomagnesite. Determination of copper GOST 19728.10 | |||
| 9. Weight loss on ignition, %, no more | 7 | 7 | GOST 19728.17-2001 Talc and talcomagnesite. Determination of weight loss on ignition GOST 19728.17 | |||
| 10. Mass fraction of moisture,%, no more | 0,5 | 0,5 | GOST 19728.19-2001 Talc and talcomagnesite. Determination of moisture GOST 19728.19 | |||
| 11. Fineness of grinding: | GOST 19728.20-2001 Talc and talcomagnesite. Determination of particle size distribution GOST 19728.20 | |||||
| remainder on the grid, %, not more than: | ||||||
| №014 | Absent | |||||
| №009 | - | 2 | ||||
| № 0045 | 3 | - | ||||
Talc is a crystalline ground mineral from white to light green in color. It has no taste and smell. To the touch - greasy, slippery and soft. Slightly soluble in acids, completely insoluble in water. The whiter the substance, the higher its quality.
natural source
Talc deposits are located throughout the Earth, including the Urals and Siberia.
Chemical formula
Hygiene standards
Although talc is harmless to the human body, dust should not be inhaled. Inhalation of the mineral can cause lung disease - talcosis, with subsequent chronic processes that can lead to oncology.
Application
Talc is widely used in medical preparations, as a source of silicon and magnesium, and as a tablet base. It is an invariable component of powders for children, it is used for prickly heat and to reduce skin friction with clothes. It is used in the manufacture of cosmetics, in the rubber and paint industries. Registered as a food additive and used for dusting in confectionery.
You can buy a mineral on our website at a bargain price. Delivery is carried out by any convenient carrier, throughout Russia.
Talc crystals.
It is found in engine oil additives to increase the life and protect the internal combustion engine. SuProtec/NanoProtec example, Hado.
Mining and production
During Soviet times, the Shabrovskoye talc-magnesite deposit in the Middle Urals and the Miass talcite deposits in the Southern Urals, the Onotskoye deposit of steatite talc (Eastern Sayan), the Kiryabinskoye deposit, Uchaly, the manufacturer of Bashtalk Company LLC, were developed, geological exploration of the West- Baikal talcon-bearing province.
Large deposits of talc are found in Canada (Maydok), USA (Gavernour), France (Luzenac).
Danger
It is possible that inhalation of talc dust can cause talcosis, a benign disease from the group of pneumoconiosis, however, special studies conducted by an interested party, namely the European Association of Talc Manufacturers, have shown that talc is harmless to health.
Meanwhile, American scientists have found that regular application of powders containing talc to the female genital area significantly increases the risk of developing uterine cancer. According to the researchers, this dependence may be due to the fact that the smallest particles of talc penetrate the internal genital organs and are fixed there for years, causing chronic inflammation. This long-term inflammation, in turn, creates favorable conditions for the malignant transformation of endometrial cells and the rapid growth of a cancerous tumor.
Notes
Links
- Talc in the catalogmineralov.ru database (Russian)
- Talc at webmineral.com
Categories:
- Minerals alphabetically
- inorganic substances
- silicates (minerals)
- magnesium minerals
- Nutritional supplements
- Anti-friction materials
- cosmetic substances
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Synonyms:See what "talc" is in other dictionaries:
talc- talc / ... Morphemic spelling dictionary
- (silicon magnesium) mineral, white and green. colors diff. shade. with a pearly sheen, greasy to the touch, like stearin. Mixed with oil, goes to lubricate the carriage wheels; it is also used in the form of powder to facilitate putting on boots. Dictionary… … Dictionary of foreign words of the Russian language
A; m. [it. Talk from Arabic.] A layered soft mineral of white or greenish color (used in technology and medicine, usually in the form of a powder). Deposits of talc. Ground t. Sprinkle abrasion with talc. Powder your hands with talcum powder (about gymnasts, weightlifters and ... encyclopedic Dictionary
A soft mineral powder that turns well into a fine powder. It is used in the confectionery business for the manufacture of mold molds, where sugar and chocolate casings are cast for liqueur sweets, that is, that rare type of sweets, ... ... Culinary Dictionary
talc- a, m. talc germ. Talk.arab. talk. Layered soft white mineral, usually used in the form of a powder in engineering and medicine. ALS 1. De la Hire and Gigens describe rhomboid spar under the name of soap (talc). Severgin 1791 1 36.… … Historical Dictionary of Gallicisms of the Russian Language
Mineral of a subclass of layered silicates, Mg3Si4O10(OH)2. White, greenish. Hardness 1; density 2.6 2.8 g/cm³. Varieties: dense steatite, fine-fibered agalite, noble transparent light talc. Product of hydrothermal alteration… … Big Encyclopedic Dictionary
- [arab. talg] ml, Mg3[(OH)3|Si4O10]. Minor substitutions of Si for Al, Ti; Mg to Fe, Mn, Al. Triocahedral layered silicate. Mon. Gab. tabular. Sp. V. owls. by (001). Ag.: scaly, leafy, dense. Colorless and with different shades ... Geological Encyclopedia
TALC, talc, pl. no, husband. (Arab.). Mineral, hydrous magnesium silicate in the form of greasy to the touch, soft, usually white powder, used. in technology, cosmetics and medicine. Sprinkle (rash, diaper rash) with talc. Explanatory Dictionary of Ushakov. D.N. Ushakov ... Explanatory Dictionary of Ushakov
TALC, a (y), husband. Light soft layered mineral, used. in technology and medicine. | adj. talc, oh, oh. Explanatory dictionary of Ozhegov. S.I. Ozhegov, N.Yu. Shvedova. 1949 1992 ... Explanatory dictionary of Ozhegov
Steatite, agalite Dictionary of Russian synonyms. talc n., number of synonyms: 7 agalite (2) ... Synonym dictionary
Talc is the most abundant material on Earth, and this soft mineral is used in cosmetics and many industries. It occupies one of the first "honorable" places on the Mohs scale, which clearly indicates its softness, although coarse-grained talc is also found in nature, which is commonly called steatite. And it is he who takes on the function of an ornamental stone.
Description of the mineral
Talc has been known to people for a long time, and one of the first to use it was George Agricola, the great scientist of the Renaissance. It was he who gave the mineral the name that people use to this day. Talc is a crystalline substance, which, due to its physico-chemical characteristics, seems greasy to the touch. This feature is explained by the friability of the mineral, and if it gets wet, then it will be simply impossible to hold a piece of talc in your hands, because it was not without reason that in ancient times it was called a “soap” stone.
"Real" talc has a pure white color, but if it contains metal impurities, then the color palette expands significantly. For example, the presence of iron, aluminum, chromium, manganese, nickel determines the hue of the mineral, and it can have a pinkish, yellow-golden, silvery-gray, brownish color. In thin layers, an almost transparent mineral is sometimes found, which looks very much like mica and is highly resistant to alkalis and acids. At its core, it is a secondary mineral formed as a result of a change in the chemical composition of magnesium silicates.
Deposits and production
The stone belongs to the category of the most ancient, which is clearly evidenced by the finds of archaeologists on the territory of modern Egypt, where amulets and jewelry were discovered during the research. In those distant times, talc was also mined in the East, and hard greenish stones were considered one of the best imitations of jade. Now it is mined almost all over the planet, and its main deposits in the Russian Federation are concentrated in the Urals and Siberia. Real deposits were found in the Trans-Baikal and Krasnoyarsk Territories.
A high-quality mineral is mined in France, Poland and some other European countries. Brazil, USA, Egypt, China - all these are territories with inexhaustible sources of talc. Some areas of Africa and South America are very rich in it, but mining is not carried out, since not a single state experiences a shortage of this peculiar stone, and its reserves are practically inexhaustible. It is noteworthy that a stone that has a solid structure is valued the most.
Varieties
The appearance, structure and properties of the mineral are determined by impurities:
- Soapstone. The composition of the mineral contains chlorite and talc in a ratio of 1: 1.
- noble talc. This is the same ornamental stone that can be perfectly processed and polished. It has the appearance of white or translucent crystals, which are characterized by high density.
- Willemseit. This mineral contains nickel and magnesium, with the former dominating the latter, which gives this stone a bluish-green tint.
- Minnesota. Brown stone. What gives him such a color? Iron dominates over magnesium.
- Agalite. It is often confused with asbestos, and the reason for this confusion lies in the similarity of the structures.
- Steatitis. This is the same legendary “soapstone” or, as it is also called, “wen”. A distinctive feature is a massive dense structure.
Physical and chemical properties
Mg3Si4O10(OH)2 is the chemical formula of talc, which is essentially hydrous magnesium silicate. In some cases, silicon can be replaced by nature with aluminum or titanium, and magnesium with manganese or iron. The quantitative and qualitative composition of impurities directly depends on the deposit. Talc is formed by the transformation of certain minerals, and in order for the “process to start”, it takes time, water and constant exposure to high temperatures - about 400 degrees.
The stone can have the most bizarre shades: from white to brown, in addition, it can be translucent. It has low elasticity, however, some varieties of the mineral bend perfectly. The mineral has low electrical and thermal conductivity, it is non-toxic, poorly soluble in acids and water. For medical and cosmetic purposes, talc is finely crushed and turned into a white powder, greasy to the touch. If necessary, the powder can be sterilized at a temperature of 160 degrees, however, this will take at least an hour.
Application in cosmetology
Women who use eye shadow every day are unaware that they contain talc. But it is he who allows decorative cosmetics not to crumble and stick well on the skin. In addition, this powdered product is often introduced into the composition of creams and other cosmetics, including powder. What does it give? Talc protects the skin and provides them with softness, smoothness and dryness for a long time. The fact is that the mineral crushed into dust is an excellent adsorbent, which literally collects sebum, sweat and chemicals, bacteria on its surface. Thus, the epidermis is provided with additional protection.
According to some scientists, this unique powder prevents the appearance and reproduction of harmful microorganisms. This is probably why it is present in baby powders. It can also be found in face masks, dry deodorants, and other products. Of course, special requirements are imposed on talc used in medicine and cosmetology: the particles must be of a certain size, without impurities, foreign odors and pathogenic microflora.
Medicinal properties
Specialists from the field of medicine believe that talc takes on the function of an antiseptic and successfully performs it. This clearly proves the historical fact, when before the invention of antibiotics in hospitals, wounds were covered with talc, since there was simply no other alternative. And it really helped to reduce the likelihood of gangrene. Yes, the powder has an anti-inflammatory property, but for it to “work”, its particles must have a certain size, since too small ones clog the skin pores, which, on the contrary, often causes inflammation.
Now talc powders are used by people with delicate skin, and besides, they are simply indispensable for infants. By the way, some doctors recommend taking this powder inside, which is not necessary, since such experiments can adversely affect health. Although, at the same time, talc is present in many drugs, however, it is used as a filler, along with starch. If you managed to get whole, not crushed stones, then they can be heated and used as a heating pad.
The benefits and harms of taklk
There is more benefit from talc than harm, but still it is. This mineral is continuously subjected to research, during which scientists have found that it can be dangerous.
If you inhale mineral dust or powder for a long time, you can become a victim of a very unpleasant disease called talcosis. This ailment is inherent in people who, by occupation, daily deal with mineral dust. In addition, oncologists put forward their own version: talc in certain situations can act as a carcinogen and provoke the appearance of cancer. It is noteworthy that this theory has not been confirmed.
magical properties
Almost all ancient and medieval sorcerers believed that this powdered talc could restore lost youth and beauty. Their “clients” sacredly believed in this, paying exorbitant amounts for anti-aging ointments and creams. In part, such drugs contributed to giving the skin a more attractive appearance, but this is not the merit of magicians and witches, but talc, which unwittingly became a source of enrichment for charlatans. It is noteworthy that this mineral is not used to make talismans and amulets, and in addition, it does not patronize any of the zodiac constellations.
Application
Probably, there is no industry in which talc would not be used: this is the production of rubber products, the manufacture of paper, the production of paints and varnishes, and even the food industry. Since talcum stone is endowed with unique physical and chemical properties, its use is expanding significantly. For example, large-sized minerals are sawn into sheets that are used as lining material for sinks, switchboards, laboratory tables, and other products. Often this material is assigned the role of a dry lubricant.
Where else can you find talc, in addition to pharmacies, hospitals and industrial production? For example, in offices. The fact is that for the preparation of especially important documents, the so-called talc paper is used, which perfectly absorbs ink. In addition, progressive ateliers and sewing workshops have long switched to talc chalk instead of the usual one (participates in cutting fabric). This is due to the fact that the compressed talc is much easier to remove from the material, and this is very important. Talc powder can be found anywhere, for example, plastic and rubber products are sprinkled with it in order to prevent them from sticking, and even ordinary rubber household gloves are always powdered from the inside with this universal powder.