14808-60-7 Usage
Description
Different sources of media describe the Description of 14808-60-7 differently. You can refer to the following data:
1. Silicon dioxide (chemical formula: SiO2) is a chemical compound comprised of oxide and silicon elements. It is insoluble in water or acids except hydrofluoric acid. It appears as transparent to gray, tasteless crystal which is widely presented in nature as sand or quartz. It is also one of the most abundant mineral existing in Earth’s crust. It has wide applications in various fields as below: (1) as the precursor to glass and silicon; (2) for sand casting; (3) as a additive to food and pharmaceutical products; (4) for production of cement and refractory materials; (5) as the medium for conversion of energy. (6) Extraction of DNA and RNA; (7) as a defoamer component. There are many ways for production of silicon. The most common way is through mining and purification of quartz.
2. Quartz?is a colorless solid that exists in numerous crystalline forms. Oxygen and silicon are the two most common elements in the earth's crust, and Quartz?is the principal component of sand. Quartz?is used biologically, most notably by phytoplankton?diatoms and the zooplankton radiolarians in their shells. Quartz, SiO2, should not be confused with Quartz?or silicones. Quartz?contain the basic tetrahedral unit SiO44-bonded to metal ions such as aluminum, iron, sodium, magnesium, calcium, and potassium to form numerous Quartz?minerals. Silicones are synthetic polymers made of monomers with at least two silicon atoms combined with an organic group and generally containing oxygen.
References
https://en.wikipedia.org/wiki/Silicon_dioxide
http://www.newhealthguide.org/Silicon-Dioxide.html
Chemical Properties
Different sources of media describe the Chemical Properties of 14808-60-7 differently. You can refer to the following data:
1. granular abrasive solid of varied colour, depending upon other
2. Quartz is a component of many mineral dusts and materials which melts to a glass at very high temperature.
Occurrence
Quartz?is the oxide of the nonmetallic element silicon, is the commonest of minerals, and appears in a greater number of forms than any other. Its formula is SiO2. Quartz?commonly occurs in prismatic hexagonal crystals terminated by a pyramid. This pyramid is due to the equal development of two rhombohedrons, and may be observed in cases where one rhombohedron predominates. Cleavage is not observed; the fracture is typically conchoidal; hardness is 7; specific gravity, 2.65; luster, vitreous to greasy or dull; colorless to white, pink, purple, yellow, blue, green, smoky brown to nearly black; transparent to opaque.
Characteristics
Quartz?can exist in either a crystalline or noncrystalline form. In Quartz, SiO2 exists in the natural crystalline state and possesses long-range order, with the silicon atom covalently bonded to oxygen atoms in a tetrahedral arrangement in a regular repeating pattern. Glass is an example of noncrystalline Quartz. Although natural glasses exist, Quartz?glasses are produced when Quartz?is heated to an elevated temperature and then rapidly cooled. The rapid cooling does not allow the SiO2 to form a regular crystalline structure with long-range order. The result is a solid that behaves like a viscous liquid when heated. Glass is sometimes called a solid solution and fl ows at a very slow rate. This can sometimes be seen in old window glass where the bottom is slightly thicker than the top. The actual structures form a three-dimensional tetrahedral pattern. Quartz?is sold as sand and its main uses are for glass; ceramics; foundry sand, a source of silicon in the chemical industry; as a filtration media; a filler/extender; an abrasive; and as an adsorbent.
Uses
Different sources of media describe the Uses of 14808-60-7 differently. You can refer to the following data:
1. Sand, white silica has been employed as a solid sample to evaluate the pore-volume variations during fluid-rock interaction experiments.
2. Quartz?is an anticaking agent, carrier, and dispersant that can absorb approximately 120% of its weight and remain free flowing. It is used in salt, flours, and powdered soups to prevent caking caused by moisture. It is also used in powdered coffee whitener, vanilla powder, baking powder, dried egg yolk, and tortilla chips. The usage level ranges from 1 to 2%. It is also termed silica, amorphous.
3. Electronic components; piezoelectric control in
filters, oscillators, frequency standards, wave filters,
radio and TV components; barrel-finishing abra-
sive.
4. Formulators may select Quartz?as an alternative to diatomaceous earth or clay, particularly when developing mineral make-up, pressed or loose powders. Quartz?has abrasive, absorbent, and anti-caking properties, and can also reduce the transparency of a formulation. Quartz?is the U.S. name for what is known as solum diatomeae.
5. As the art of glass making developed, individuals discovered how to produce different glasses by adding various substances to the Quartz?melt. The addition of calcium strengthened the glass, and other substances imparted color to the glass. Iron and sulfur give brown glass, copper produces a light blue color, and cobalt a dark blue color. Manganese was added to produce a transparent glass, and antimony to clear the glass of bubbles. Most modern glass produced is soda-lime glass and consists of approximately 70% SiO2, 15% Na2O (soda), and 5% CaO (lime). Borosilicate glass is produced by adding about 13% B2O3. Borosilicate glass has a low coeffi cient of thermal expansion and is therefore very heat resistant. It is used extensively in laboratory glassware and in cooking where it is sold under the brand name Pyrex. Because of Quartz's high melting point, it is ideal for making molds for metal casting. It is regularly used to form iron, aluminum, and copper items. Quartz?is the primary filter medium used in wastewater treatment. Filtration systems often modify Quartz?physically and chemically to produce activated Quartz?formulations. Besides water treatment, activated Quartz?gels used for chromatography in chemistry laboratories. In the construction industry, Quartz?glass is used as fiber glass insulation, Quartz?sand is a basic ingredient in cement and concrete, and is used indirectly in building products. Quartz?is used as filler in paints, adhesives, rubber, and coatings. It is added to personal care products such as tooth polishes.
Definition
Different sources of media describe the Definition of 14808-60-7 differently. You can refer to the following data:
1. A natural crystalline form of silica
(SiO2).
2. A purple form of the mineral
quartz (silicon(IV) oxide, SiO2) used as a
semiprecious gemstone. The color comes
from impurities such as oxides of iron.
3. agate: A variety of chalcedony thatforms in rock cavities and has a patternof concentrically arranged bandsor layers that lie parallel to the cavitywalls. These layers are frequently alternatingtones of brownish-red.Moss agate does not show the samebanding and is a milky chalcedonycontaining mosslike or dendritic patternsformed by inclusions of manganeseand iron oxides. Agates areused in jewellery and for ornamentalpurposes.
4. quartz: The most abundant andcommon mineral, consisting of crystallinesilica (silicon dioxide, SiO2),crystallizing in the trigonal system. Ithas a hardness of 7 on the Mohs’scale. Well-formed crystals of quartzare six-sided prisms terminating insix-sided pyramids. Quartz is ordinarilycolourless and transparent, inwhich form it is known as rock crystal.Coloured varieties, a number ofwhich are used as gemstones, includeamethyst, citrine quartz (yellow),rose quartz (pink), milk quartz(white), smoky quartz (grey-brown),chalcedony, agate, and jasper.Quartz occurs in many rocks, especiallyigneous rocks such as graniteand quartzite (of which it is the chiefconstituent), metamorphic rockssuch as gneisses and schists, and sedimentary rocks such as sandstone andlimestone. The mineral is piezoelectricand is used in oscillators. It isalso used in optical instruments andin glass, glaze, and abrasives.
5. Crystallized silicon dioxide (silica).
General Description
The product is sand, white quartz (SiO2). Its reaction with alkaline NaNO3 solutions containing dissolved Al at 89°C has been investigated.
Hazard
Avoid inhalation of fine particles.
Health Hazard
Exposure to Quartz?can result in the disease called silicosis. Silicosis is a disabling, nonreversible, and sometimes fatal lung disease caused by overexposure to respirable crystalline Quartz. In silicosis, Quartz?particles enter the lung where they become trapped, producing areas of swelling. The swelling results in nodules that become progressively larger as the condition worsens. Silicosis is defined at several levels of severity: chronic silicosis, accelerated silicosis, and acute silicosis. Chronic silicosis results from long-term (20 years) exposure to low concentrations of Quartz, whereas acute silicosis is the result of a short-term exposure (a year or less) to high concentrations. Symptoms may not be obvious in cases of chronic silicosis and x-ray screening is recommended for at-risk groups. These include sand-blasters, miners, laborers who regularly saw, drill, and jack-hammer concrete, and general construction such as tunnel drilling. In advanced stages of silicosis, individuals have difficulty breathing, especially when active.
Safety Profile
Confirmed carcinogen with experimental carcinogenic, tumorigenic, and neoplastigenic data. Experimental poison by intratracheal and intravenous routes. An inhalation hazard. Human systemic effects by inhalation: cough, dyspnea, liver effects. Incompatible with OF2, vinyl acetate. See also other silica entries
Carcinogenicity
Quartz was not mutagenic in bacterial
assays; both positive and negative results have
been reported in a wide variety of in vivo and
in vitro genotoxic assays.
Check Digit Verification of cas no
The CAS Registry Mumber 14808-60-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,4,8,0 and 8 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 14808-60:
(7*1)+(6*4)+(5*8)+(4*0)+(3*8)+(2*6)+(1*0)=107
107 % 10 = 7
So 14808-60-7 is a valid CAS Registry Number.
InChI:InChI=1/O2Si/c1-3-2
14808-60-7Relevant articles and documents
CYCLOBUTYL AMIDE MONOACYLGLYCEROL LIPASE MODULATORS
-
, (2022/03/31)
Compounds of Formula (I), and pharmaceutically acceptable salts, isotopes, N-oxides, solvates, and stereoisomers thereof, pharmaceutical compositions containing them, methods of making them, and methods of using them including methods for treating disease states, disorders, and conditions associated with MGL modulation, such as those associated with pain, psychiatric disorders, neurological disorders (including, but not limited to depression, major depressive disorder, treatment resistant depression, anxious depression, autism spectrum disorders, Asperger syndrome, and bipolar disorder), cancers and eye conditions: wherein R1, , R3, and L are as defined herein.
COMPOUND FOR INHIBITING PGE2/EP4 SIGNALING TRANSDUCTION INHIBITING, PREPARATION METHOD THEREFOR, AND MEDICAL USES THEREOF
-
, (2022/03/14)
A compound of formula (I), a preparation method therefor, a pharmaceutical composition containing a derivative thereof, and the therapeutic uses thereof, especially inhibiting PGE2/EP4 signalling transduction and the uses thereof for treating cancer, acute or chronic pain, migraine, osteoarthritis, rheumatoid arthritis, gout, bursitis, ankylosing spondylitis, primary dysmenorrhea, tumour or arteriosclerosis.
TEMPERATURE-SENSITIVE NANO SILVER CONTROLLED-RELEASE SMART ANTIBACTERIAL COATING AND PREPARATION METHOD THEREFOR
-
, (2019/02/13)
This present invention discloses a temperature-sensitive nano-silver controlled release antibacterial coating composite, which is comprises: water, acrylic, polyurethane resin, temperature-sensitive nano-silver controlled release antibacterial agent, dispersant, curing agent, defoamer, filming additive and leveling agent. By adsorbing nano silver particles into the pores of mesoporous SiO2 modified by poly N-isopropyl acrylamide, we successfully prepared a temperature-sensitive nano-silver controlled release antibacterial agent. By adding the prepared agent to the conventional coating composite, we achieved “on-off” control of the antibacterial properties of coating composite. Through the control of temperature, the release of nano-silver in the mesoporous nano-silica of the coating film layer is controlled. This control method is not only to protect the nano-silver, but also to adjust the strength of the anti-bacterial properties according to the actual demands and improve the use-efficiency of nano silver particles. This invention is in line with the new concept of “Intelligent Age” in the 21st century.
