オルトけい酸テトラメチル 化学特性,用途語,生産方法
外観
無色～ほとんど無色透明液体
用途
ブラウン管テレビの画像画面のコーティング
主な用途／役割
シリコーン樹脂の触媒として使用される。
化学的特性
Tetramethyl orthosilicate (TMOS), the methyl ester of orthosilicic acid, is a colorless, low-viscosity liquid. It is industrially the most important of the tetraalkyl silicates.
使用
Tetramethyl Orthosilicate is a compound used in the research of the multifunctionality of silicified nanoshells and the efficiency at adsorbing cadmium ions at cell interfaces.
調製方法
Silica aerogels are usually prepared by base-catalyzed reaction
of tetramethoxysilane or tetraethoxysilane, mostly with
ammonia as the catalyst. A modification of this procedure is
to prehydrolyze Si(OR)4 with a small amount of water under
acidic conditions.
一般的な説明
A clear colorless liquid. Flash point below 125°F. Less dense than water and insoluble in water. Very toxic by ingestion and inhalation and very irritating to skin and eyes. Used to make paints and lacquers.
空気と水の反応
Flammable. Insoluble in water.
反応プロフィール
Tetramethyl orthosilicate is incompatible with the following: Oxidizers; hexafluorides of rhenium, molybdenum & tungsten .
危険性
Eye damage and upper respiratory tract irri-tant.
健康ハザード
TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Bromoacetates and chloroacetates are extremely irritating/lachrymators. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
火災危険
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
安全性プロファイル
Poison by
intraperitoneal route. Moderately toxic by
inhalation. Midly toxic by skin contact. A
severe eye irritant. This material can cause extensive necrosis (experimentally),
keratoconus, and opaque cornea. It also
causes severe human eye injuries, as well as
necrosis of corneal cells, which progresses
long after exposure has ceased. It is
destructive and its effects resist treatment.
Permanent blindness is possible from
exposure to it. The kidney seems to be most
subject to injury regardless of the mode of
exposure. Pulmonary edema has also
occurred. This material is more toxic than
either ethyl silicate or silicic acid, although it
has been thought that the injury caused is
largely due to the action of the silicic acid.
Flammable when exposed to heat or flame;
can react vigorously with oxidizing
materials. Potentially violent reaction with
metal hexafluorides (e.g., rhenium,
molybdenum, tungsten). When heated to
decomposition it emits acrid smoke and
irritating fumes.
職業ばく露
Methyl silicate is used in coating
screens of television picture tubes. It may be used in mold
binders and in corrosion-resistant coatings; as well as in
catalyst preparation and as a silicone intermediate.
輸送方法
UN2606 Methyl orthosilicate, Hazard class: 6.1;
Labels: 6.1-Poisonous materials, 3-Flammable liquid.
純化方法
Purification is as for tetraethoxysilane. It has a vapour pressure of 2.5mm at 0o. [IR: Sternbach & MacDiarmid J Am Chem Soc 81 5109 1959. Beilstein 1 IV 1266.]
不和合性
Vapor may form explosive mixture with
air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep
away from alkaline materials, including alkaline earth
metals, metals, strong acids, strong bases; water, moisture,
steam decomposes releasing toxic, flammable gases.
Violent reaction with metal hexafluorides of rhenium,
molybdenum, and tungsten. Contact with metals may
evolve flammable hydrogen gas.
オルトけい酸テトラメチル 上流と下流の製品情報
原材料
準備製品