Mahnesium Silicate
Magnesium silicate
CAS: 13376-74-4
Molecular Formula: H2Mg3O12Si4
Mahnesium Silicate - Names and Identifiers
| Name | Magnesium silicate |
| Synonyms | TALC TALCUM STEATITE SOAPSTONE VANTALC 6H TALCUM VENETUM VANTALC F 2003 Mahnesium Silicate Magnesium silicate |
| CAS | 13376-74-4 |
| EINECS | 238-877-9 |
Mahnesium Silicate - Physico-chemical Properties
| Molecular Formula | H2Mg3O12Si4 |
| Molar Mass | 379.27 |
| Density | 2,7 g/cm3 |
| Melting Point | 800 °C |
| Appearance | Talclike material of varyingcomposition, but generally grayish-white, fine,odorless power. It is noncombustible andinsoluble in water. |
| Storage Condition | -70°C |
| Refractive Index | 1.54-1.59 |
| Physical and Chemical Properties | Talc is a magnesium-rich layered hydrous silicate mineral. Monoclinic system, usually in the form of leaf-like, scale-like, granular, fibrous aggregate or dense block. The color is white, light green, light gray, light yellow, light brown or pink. Sometimes stained with impurities in green, black or dark gray. Glass gloss or grease gloss, cleavage in the pearl luster. Hardness 1~1.5, is the lowest hardness of the mineral, the official density of 2.7~2.8g/cm3. It has a smooth feeling and lubricity, and emits white fluorescence under ultraviolet irradiation. It has high electrical insulation and thermal insulation, and the refractoriness is as high as 1490~1510. Lipophilic hydrophobic and adsorption, insoluble in water, chemical stability. Pure talc usually does not react with strong acids and bases. From the magnesium-rich basic rock carbonate by hydrothermal metasomatism and ultra-basic rock alteration. ~ ~ ~ |
Mahnesium Silicate - Risk and Safety
| Risk Codes | R20 - Harmful by inhalation R37 - Irritating to the respiratory system R61 - May cause harm to the unborn child |
| Safety Description | S36 - Wear suitable protective clothing. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S53 - Avoid exposure - obtain special instructions before use. |
| WGK Germany | - |
| RTECS | WW2710000 |
| TSCA | Yes |
Mahnesium Silicate - Nature
Open Data Verified Data
talc is a hydrous silicate mineral with a layered structure. Its chemical composition mgo31.8%, Sio2 63. 37%, H20 4.75%, often containing a small amount of Fe, Al and other elements. Pure talc is white or microstrip light yellow, pink, light green, light brown tone, glass gloss. The darker colored talc is caused by the presence of impurity elements. Monoclinic system, usually in the form of leaf-like, scale-like, granular, fibrous assembly or dense block. Hardness of 1, density of 2.58~2.83g/cm3, soft, smooth. Talc has high electrical insulation, thermal insulation, high melting point and strong adsorption properties to oils. Pure talc ore rarely, usually chlorite, magnesite, tremolite, dolomite, siderite, quartz, pyrite and other minerals associated.
Last Update：2024-01-02 23:10:35
Mahnesium Silicate - Preparation Method
Open Data Verified Data
our country talc mineral processing commonly used by hand, dry grinding air classification method. The product (0 ~ 44um) of the raw ore after coarse, medium and fine grinding, and then grinding and grading treatment can be sold as a finished product. If products with higher quality requirements are needed, also after fine grinding processing (0 ~ 5um).
Last Update：2022-01-01 09:07:20
Mahnesium Silicate - Use
Open Data Verified Data
talc has good heat resistance, lubrication, resistance to acid and alkali, insulation and oil has strong adsorption and other excellent characteristics. Widely used in ceramics, paint, linoleum, paper, textile, rubber, paint, daily chemical and other industrial fields. Paper industry is the main application field of talc, which can be used as coating and filler. Superfine talc can be used together with kaolin, calcium carbonate and titanium dioxide pigment to control the ink, gloss, brightness and opacity of paper; the textile industry uses the low wear and high whiteness of talc as a filler and brightener for textiles; The paint industry as a filler to improve the dispersion of coatings; In the cable, plastic, rubber industry, used as a filler to improve the acid and alkali resistance, heat resistance, impact strength, thermal conductivity, tensile strength, creep resistance and electrical insulation properties of plastics and rubbers, and can improve the processing properties of rubbers; Ceramics, refractory materials are industrially used as ingredients and glazes, which can effectively control the thermal expansion of ceramic bodies, and can provide cheap sources of magnesium oxide as glazes. The talc can be directly processed into a plate, as a furnace lining, kiln lining or insulating panel. It can also be used as a cosmetic filler, a carrier and an additive for medicine and food.
Last Update：2022-01-01 09:07:21
Mahnesium Silicate - Safety
Open Data Verified Data
dust inhalation, eye and skin contact. Repeated large inhalation can cause scarring of the lungs, shortness of breath, Cough, disability and death. Eye contact can cause irritation, causing serious damage to the eyes. Chest X-ray was abnormal. Staff should be protected. If the eyes and skin are touched, they should be immediately rinsed with flowing water.
Last Update：2022-01-01 09:07:21
Mahnesium Silicate - Reference Information
| use | talc is used as a filler for plastics, rubber, coatings, ink, oil paint, cosmetics and as a carrier for fertilizers, pesticides and medicines in the chemical industry. It is also widely used in metallurgy, papermaking, military industry, linoleum, cables, ceramics, textiles, food, building materials, craft carving and other departments. Talc is used as a filler for plastics, rubber, paint, cosmetics and as a carrier for fertilizers, pesticides and medicines in the chemical industry. It is also widely used in metallurgy, papermaking, military industry, linoleum, cables, ceramics, textiles, food, building materials, craft carving and other departments. |
| production method | talc deposits in China have open pit mining and underground mining. Underground mining is mainly flat cave, and mining methods mostly use natural caving method and bottomless column layered caving method. Mineral processing generally adopts hand selection and dry grinding air classification. The principle and process of talcum powder beneficiation are as follows: There are open pit mining and underground mining for talcum deposits in China. Underground mining is mainly flat cave, and mining methods mostly use natural caving method and bottomless column layered caving method. Mineral processing generally adopts hand selection and dry grinding air classification. The processing process of talcum powder beneficiation is as follows: raw ore → hand selection → coarse crushing → medium fine crushing → grinding → finished product (44 μm)→ product raw ore → hand selection → coarse crushing → medium fine crushing → grinding → classification → micro grinding → classification → packaging → product (0~5 μm) |
| immediate life-threatening and health concentration | 3,000 mg/m3 |
Last Update：2024-04-09 02:00:03
