솝스톤

솝스톤 속성

솝스톤 C화학적 특성, 용도, 생산

순도시험

  (1) 물가용물 및 액성 : 이 품목 10g에 물 100mL를 가하여 증발하는 물은 보충하면서 때때로 흔들어 섞으면서 2시간 가열하고 식힌 다음 밀리포아여과기를 사용하여 여과한다. 여액이 탁할 때는 동일여과기를 사용하여 여과하고 비이커 및 여과기위의 잔류물은 물로 씻어주고 세액을 여액에 합한 다음 물을 가하여 100mL로 한 액을 시험용액으로 할 때, 이 액의 pH는 7.5～9.5이어야 한다. 시험용액 50mL를 취하여 증발건고시킨 다음 잔류물을 105℃에서 2시간 건조할 때, 그 양은 10mg 이하이어야 한다.

  (2) 염산가용물 : 이 품목 1g에 묽은염산 20mL를 가하여 약 50℃에서 15분간 저어 섞으면서 가온하고 식힌 다음 여과한다. 비이커 및 여과지위의 잔류물은 소량의 물로 씻어 주고 세액은 여액에 합한 다음 물을 가하여 20mL로 한다. 이 액 10mL를 취하여 묽은황산 1mL를 가하여 증발건고하고 다시 항량이 될 때까지 550℃에서 강열할 때, 그 잔류물은 10mg 이하이어야 한다.

  (3) 비소 : 이 품목을 비소시험법에 따라 시험할 때, 그 양은 4.0ppm 이하이어야 한다.

  (4) 수용성 철 : (1)의 시험용액 20mL를 취하여 염산으로 약산성으로 하고, 페로시안화칼륨시액 1방울을 가할 때, 청색을 나타내어서는 아니 된다.

  (5) 납 : 이 품목 약 5g을 정밀히 달아 묽은염산 40mL 및 물 50mL를 가하여 잘 흔들어 섞은 다음 조용히 끓여 주고 식힌 다음 여과한다. 잔류물은 물로 씻어주고 세액은 여액에 합한 다음 물을 가하여 250mL로 한다. 다시 이액 125mL를 취하여 수욕상에서 증발건고하고 잔류물에 염산(1→10)을 가하여 10mL로 한 액을 시험용액으로 하여 원자흡광광도법 또는 유도결합플라즈마발광광도법에 따라 시험할 때, 그 양은 2.0ppm 이하이어야 한다.

  (6) 석면 : 다음의 (가) 또는 (나)의 방법으로 시험할 때, 석면이 확인되어서는 아니 된다. 만일 (가) 또는 (나)에서 석면이 확인되는 경우에는 추가로 (다)의 방법에 따라 시험할 때, 석면이 검출되어서는 아니 된다.

    (가) 이 품목을 적외부흡수스펙트럼측정법의 브롬화칼륨정제법에 따라 측정할 때, 파수 600～650cm^-1(사문석계 석면) 또는 757～759cm^-1(각섬석계 석면)에서 흡수를 확인한다. 만일 파수 757～759cm^-1에서 흡수피크가 있을 경우에는 검체 일정량을 850℃에서 30분 이상 강열하고 식힌 다음 다시 적외선흡수스펙트럼을 측정하여 각섬석계 석면 중 트레몰라이트를 나타내는 파수 757～759cm^-1에서 흡수피크를 확인한다.

    (나) 이 품목을 분말 X-선 회절장치를 사용하여 다음의 조작조건으로 분말회절을 측정할 때, 회절각 2θ가 10.4～10.6°(각섬석계 석면) 및 24.2～24.4°와 12.0～12.2°(사문석계 백석면)의 회절피크를 확인한다.

       조작조건

          X선광원 : Cu Kα 모노크로미터

          관전류 및 관전압 : 24～30mA, 40kV

          입 사 각 : 1°

          측 정 각 : 0.2°

          주사속도 : 0.1°/min

          주사범위(회절각 2θ) : 10～13°, 24～26°

    (다) 이 품목을 광학현미경을 사용하여 석면의 형태와 색상 등을 관찰하고, 다음의 특성을 나타내는 경우 석면이 검출된 것으로 한다.

       ① 섬유 길이와 폭의 비율은 20 : 1～100 : 1 범위 내에 있거나 또는 섬유 길이가 5μm 보다 긴 경우에는 길이와 폭의 비율이 100 : 1 이상이다.

       ② 매우 가는 세(細)섬유로 갈라질 수 있다.

       ③ 아래의 4개 특징 중 2개 또는 그 이상을 나타낸다.

        ㉠ 섬유묶음 안에 평행한 섬유들이 있을 경우

        ㉡ 닳거나 끝이 해진 섬유묶음이 있을 경우

        ㉢ 가는 바늘 형태의 섬유들이 있을 경우

        ㉣ 각각의 섬유들이 헝클어진 덩어리이거나 곡선형으로 굽은 형태를 나타낼 경우

확인시험

확인시험  이 품목 0.2g에 무수탄산나트륨 0.9g 및 무수탄산칼륨 1.3g을 섞어 백금도가니 또는 니켈도가니에 넣고 가열하여 완전히 녹힌다. 식힌 다음 열탕 약 5mL로 비이커에 옮겨 거품이 발생하지 아니할 때까지 염산을 가한 다음 다시 염산 10mL를 더 넣고 수욕상에서 증발건고한다. 식힌 다음 물 20mL를 가하여 끓이고 여과하면 겔상의 물질이 남는다. 또 여액은 확인시험법 중 마그네슘염의 반응을 나타낸다.

정의

  이 품목은 천연의 함수규산마그네슘을 정선한 것이며, 때로는 소량의 규산알루미늄을 함유한다.

개요

Soapstone is composed primarily of talc, and has been used for most of recorded history as a carving medium; examples thousands of years old are still extant from Egyptian, Assyrian, and Chinese cultures. The term ‘talc’ was first used in AD 869 to describe minerals that were largely composed of what we now know as talc.

화학적 성질

Talc is a very fine, white to grayish-white, odorless, impalpable, unctuous, crystalline powder. It adheres readily to the skin and is soft to the touch and free from grittiness.

출처

Talc is formed under hydrothermal conditions and is a typical mineral of weaker regional metamorphism (regional dynamo-thermometamorphism). It often occurs in association with chlorite, serpentine, or magnesite. The main parent rocks that undergo metamorphic mineral reactions leading to talc formation are either ( magnesite-bearing) siliceous dolomites, or olivine- and/or pyroxene- containing ultrabasics. In ultrabasic rocks, talc is often a product of hydrothermal alteration (autometasomatism). In commercially important deposits, talc occurs in association with tremolite, calcite, quartz, and dolomite, as the product of a more intense regional metamorphism of siliceous dolomites, and with forsterite and anthophyllite due to intense regional metamorphic overprint of ultrabasics. However, talc can also be observed as an authigenic new formation, e.g., in sandy sediments and salt deposits. Other minerals that occur in association with talc include chlorites, mica, actinolite, feldspars, rutile, pyrrhotite, pyrite, magnetite, and hematite. Limonite, a product of the weathering of iron- containing minerals, especially iron- containing ore minerals, can often be found interspersed with talc.

역사

Talc, soapstone, and steatite have been used by humans as raw materials since prehistoric times. Molds carved from soapstone were used in the Bronze Age and early Iron Age for casting weapons and tools. In the Mediterranean cultures of the classical period, stone carvings were made from soapstone, and talc was used for treating wounds and in the production of cosmetic powder. In ancient Rome, women used large amounts of powder and rouge. The properties of talc, especially its characteristic greasy feel, were described by Pliny the Elder. The old Arabic word talq, which indicates its greasy nature, gave its name to the mineral. In 1550, Catherin de Medici made it once again fashionable to use facial makeup in the form of powdered talc colored by the addition of pigments, a fashion that found innumerable imitators and has continued without interruption until today.

용도

Talc is a mineral composed of hydrated magnesium silicate with the chemical formula H2Mg3(SiO3)4 or Mg3Si4O10(OH)2. Talc is used in many industries such as paper making, plastic, paint and coatings, rubber, food, electric cable, pharmaceuticals, cosmetics

생산 방법

Talc is a naturally occurring hydropolysilicate mineral found in many parts of the world including Australia, China, Italy, India, France, and the USA.
The purity of talc varies depending on the country of origin. For example, Italian types are reported to contain calcium silicate as the contaminant; Indian types contain aluminum and iron oxides; French types contain aluminum oxide; and American types contain calcium carbonate (California), iron oxide (Montana), aluminum and iron oxides (North Carolina), or aluminum oxide (Alabama).
Naturally occurring talc is mined and pulverized before being subjected to flotation processes to remove various impurities such as asbestos (tremolite); carbon; dolomite; iron oxide; and various other magnesium and carbonate minerals. Following this process, the talc is finely powdered, treated with dilute hydrochloric acid, washed with water, and then dried. The processing variables of agglomerated talc strongly influence its physical characteristics.

정의

Talc, a hydrated magnesium sulfate, is the primary component of most face powders (eye shadows and blushers). In some products, talc makes up to 70% of the formulation. Cosmetic talc should be white, free of asbestos, should have high spreadability or slip, with low coverage. Particle size is acceptable if the material passes through a 200 mesh sieve. Micronized talc is generally lighter and fluffier but less smooth on the skin than regular grades. Typically talc products are sterilized using gamma irradiation. Cosmetic talcs are mined in Italy, France, Norway, India, Spain, China, Egypt, Japan, and the United States. Talc is fairly hydrophobic, although treatments are used to enhance its texture.

일반 설명

Odorless white to grayish-white very fine crystalline powder (unctuous). Readily adheres to the skin. Nonflammable, noncombustible, and nontoxic.

공기와 물의 반응

Insoluble in water.

반응 프로필

Talc has low reactivity.

건강위험

Pure talc is toxicologically harmless. However, where there are high concentrations of dust in the air, face masks should be worn. If the talc contains detectable amounts of asbestos or asbestos minerals, an MAK value of 2.0 mg/m3 applies. Talc is a nontoxic, inert substance or raw material, but it can contaminate wounds and if inhaled it can cause lung irritations.

화재위험

Literature sources indicate that Talc is nonflammable.

Pharmaceutical Applications

Talc was once widely used in oral solid dosage formulations as a lubricant and diluent, although today it is less commonly used. However, it is widely used as a dissolution retardant in the development of controlled-release products. Talc is also used as a lubricant in tablet formulations; in a novel powder coating for extended-release pellets; and as an adsorbant.
In topical preparations, talc is used as a dusting powder, although it should not be used to dust surgical gloves. Talc is a natural material; it may therefore frequently contain microorganisms and should be sterilized when used as a dusting powder.
Talc is additionally used to clarify liquids and is also used in cosmetics and food products, mainly for its lubricant properties.

Safety Profile

The talc with less than 1 percent asbestos is regarded as a nuisance dust. Talc with greater percentage of asbestos may be a human carcinogen. A human skin irritant. Prolonged or repeated exposure can produce a form of pulmonary fibrosis (talc pneumoconiosis) which may be due to asbestos content. Questionable carcinogen with experimental tumorigenic data. A common air contaminant.

Safety

Talc is used mainly in tablet and capsule formulations. Talc is not absorbed systemically following oral ingestion and is therefore regarded as an essentially nontoxic material. However, intranasal or intravenous abuse of products containing talc can cause granulomas in body tissues, particularly the lungs. Contamination of wounds or body cavities with talc may also cause granulomas; therefore, it should not be used to dust surgical gloves. Inhalation of talc causes irritation and may cause severe respiratory distress in infants.
Although talc has been extensively investigated for its carcinogenic potential, and it has been suggested that there is an increased risk of ovarian cancer in women using talc, the evidence is inconclusive. However, talc contaminated with asbestos has been proved to be carcinogenic in humans, and asbestos-free grades should therefore be used in pharmaceutical products.
Also, long-term toxic effects of talc contaminated with large quantities of hexachlorophene caused serious irreversible neurotoxicity in infants accidentally exposed to the substance.

Carcinogenicity

In vitro assay of a number of respirable talc specimens of high purity demonstrated a modest but consistent cytotoxicity to macrophages; the investigators conclude that the talcs would be expected to be slightly fibrogenic in vivo.

저장

Talc is a stable material and may be sterilized by heating at 160°C for not less than 1 hour. It may also be sterilized by exposure to ethylene oxide or gamma irradiation.
Talc should be stored in a well-closed container in a cool, dry place.

비 호환성

Incompatible with quaternary ammonium compounds.

Regulatory Status

Accepted for use as a food additive in Europe. Included in the FDA Inactive Ingredients Database (buccal tablets; oral capsules and tablets; rectal and topical preparations). Included in nonparenteral medicines licensed in the UK. Included in the Canadian List of Acceptable Non-medicinal Ingredients.

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솝스톤 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Hebei Mojin Biotechnology Co., Ltd	+8613288715578	sales@hbmojin.com	China	12453	58
Hebei Dongdu Import and Export Co. LTD	+86-15333296769 +86-15333296769	manager@cndongdu.com	China	71	58
Henan Bao Enluo International TradeCo.，LTD	+86-17331933971 +86-17331933971	deasea125996@gmail.com	China	2503	58
Yujiang Chemical (Shandong) Co.,Ltd.	+86-17736087130 +86-18633844644	catherine@yjchem.com.cn	China	89	58
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21695	55
Hangzhou FandaChem Co.,Ltd.	008657128800458; +8615858145714	fandachem@gmail.com	China	9352	55
Hefei TNJ Chemical Industry Co.,Ltd.	+86-0551-65418679 +86-18949832763	info@tnjchem.com	China	2989	55
Shanghai Zheyan Biotech Co., Ltd.	18017610038	zheyansh@163.com	CHINA	3620	58
career henan chemical co	+86-0371-86658258	sales@coreychem.com	China	29914	58
Hubei Jusheng Technology Co.,Ltd.	18871490254	linda@hubeijusheng.com	CHINA	28180	58

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