炭酸カルシウム 化学特性,用途語,生産方法
外観
白色の微細な粉末
定義
本品は、炭酸のカルシウム塩であり、次の化学式で表される。
溶解性
希塩酸に溶け、水及びエタノールにほとんど溶けない。
解説
塩化カルシウム水溶液と炭酸ナトリウム水溶液とから微細沈殿として得られる炭酸カルシウム．日本薬局方所載．ペンキ顔料，紙やゴムの充填剤などに用いられる．
森北出版「化学辞典（第2版）
用途
二酸化炭素の製造, セメントの製造原料, 製鉄用途(不純物除去剤), 歯ミガキ粉・白墨・化粧品の製造原料。
用途
コンクリート中の塩分(塩化物)測定における試料溶液調整用。
用途
高純度金属化合物。
用途
アルカリ金属の分析用試薬。
用途
医薬、化粧品及び食品添加物等の原料。
用途
カルシウム標準液調製原料、医薬品原料。
用途
食品添加物。
化粧品の成分用途
不透明化剤、緩衝剤、口腔ケア剤、皮膚コンディショニング剤、研磨.スクラブ剤、増量剤
効能
制酸薬, 高リン血症治療薬
主な用途／役割
エマルション系接着剤、エポキシ樹脂系接着剤、ポリウレタン系接着剤、ゴム系接着剤、シーリング材に使用される。
商品名
カルタン (マイラン製薬); カルタン (マイラン製薬); カルタン (マイラン製薬); カルタン (マイラン製薬); 沈降炭酸カルシウム (健栄製薬); 沈降炭酸カルシウム (司生堂製薬); 沈降炭酸カルシウム (吉田製薬); 沈降炭酸カルシウム (小堺製薬); 沈降炭酸カルシウム (小堺製薬); 沈降炭酸カルシウム (小堺製薬); 沈降炭酸カルシウム (山善製薬); 沈降炭酸カルシウム (恵美須薬品化工); 沈降炭酸カルシウム (日医工)
使用上の注意
純度は金属ベースで差数法によって算出したもので、重量又は容量分析等の化学的方法によるものではありません。使用目的により、正確な含量が必要な場合は、それらの方法によって測定する必要があります。
説明
Calcium carbonate occurs in nature as limestone in various forms, such as marble, chalk, and coral. It is probably the most widely-used raw material in the chemical industry. It has numerous applications, primarily to produce cement, mortars, plasters, refractories, and glass as building materials. It also is used to produce quicklime, hydrated lime and a number of calcium compounds. It is produced either as powdered or precipitated calcium carbonate. The latter consists of finer particles of greater purity and more uniform size. They also have many important commercial applications. Various grades of precipitated calcium carbonate are used in several products, such as textiles, papers, paints, plastics, adhesives, sealants, and cosmetics.
calcium carbonate block
化学的特性
Calcium carbonate occurs in two forms—hexagonal crystal known as calcite, and orthorhombic form, aragonite. Calcite decomposes on heating at 825°C, aragonite melts at 1,339°C (at 102.5 atm). Density 2.71 g/cm3 (calcite), 2.83 g/cm3 (aragonite); insoluble in water (15mg/L at 25°C); Ksp 4.8x10–9 ; soluble in dilute mineral acids.
物理的性質
Calcium carbonate is a naturally occurring compound found in organisms and throughout the earth’s crust. After quartz, calcium carbonate, primarily in the form of calcite, is the most common mineral found in the crust. Geologically, calcium carbonate exists in several mineral forms: calcite, aragonite, and vaterite. Calcite is the most common calcium carbonate mineral, whereas vaterite is a very rare form. The different mineral forms of calcium carbonate are based on their crystalline structure. The form of calcium carbonate depends on the conditions at its formation such as temperature and pressure.
天然物の起源
Calcium carbonate occurs in nature as limestone in various forms, such as marble, chalk, and coral. It is probably the most widely-used raw material in the chemical industry. It has numerous applications, primarily to produce cement, mortars, plasters, refractories, and glass as building materials. It also is used to produce quicklime, hydrated lime and a number of calcium compounds. It is produced either as powdered or precipitated calcium carbonate. The latter consists of finer particles of greater purity and more uniform size. They also have many important commercial applications. Various grades of precipitated calcium carbonate are used in several products, such as textiles, papers, paints, plastics, adhesives, sealants, and cosmetics.
使用
Calcium Carbonate is the calcium salt of carbonic acid which is
used as an anticaking agent and dough strengthener. it is available
in varying particle sizes ranging from coarse to fine powder. it is
practically insoluble in water and alcohol, but the presence of any
ammonium salt or carbon dioxide increases its solubility while the
presence of any alkali hydroxide reduces its solubility. it has a ph of
9–9.5. it is the primary source of lime (calcium oxide) which is made
by heating limestone in a furnace. calcium carbonate is used as a
filler in baking powder, for calcium enrichment, as a mild buffering
agent in doughs, as a source of calcium ions in dry mix desserts, and
as a neutralizer in antacids. it is also termed limestone.
主な応用
Calcium carbonate is used as a very mild abrasive for hand polishing nickel, gold, silver, or plated ware, buttons, and similar materials.
調製方法
Calcium carbonate is obtained from natural limestone deposits. The purified compound, known as precipitated calcium carbonate, is synthesized from limestone. Limestone is calcined to calcium oxide and carbon dioxide in a kiln. The products are recombined after purification. Calcium oxide is hydrated with water to give a slurry called milk of lime, which is then carbonated by bubbling CO2 through it. The reactions involved in the process are as follows:
CaCO3 CaO + CO2
CaO + H2O Ca(OH)2
Ca(OH)2+ CO2→CaCO3+ H2O
The crystal sizes required for various commercial applications may be controlled by temperature, pH, concentrations, and mixing rate.
Calcium carbonate also may be precipitated by mixing solutions of calcium chloride and sodium carbonate.
定義
calcium carbonate: A white solid,CaCO
3, which is only sparingly solublein water. Calcium carbonatedecomposes on heating to give calciumoxide (quicklime) and carbondioxide. It occurs naturally as theminerals calcite (rhombohedral; r.d.2.71) and aragonite (rhombic; r.d.2.93). Rocks containing calcium carbonatedissolve slowly in acidifiedrainwater (containing dissolved CO
2)to cause temporary hardness. In thelaboratory, calcium carbonate is precipitatedfrom limewater by carbondioxide. Calcium carbonate is used inmaking lime (calcium oxide) and isthe main raw material for theSolvay process.
製造方法
Calcium carbonate may also be produced by
mixing solutions of calcium chloride and sodium
carbonate. In some cases, the presence of sodium is
objectionable so that the ammonium carbonate salt is
preferable.
反応性
Calcium carbonate decomposes to calcium oxide and CO2 on heating. Treatment with dilute mineral acids produces corresponding calcium salts with liberation of CO2:
CaCO3+ 2HCl →CaCl2+ H2O + CO2
In the presence of CO2 it dissolves in water with the formation of bicarbonate:
CaCO3+ H2O + CO2→Ca2++ 2HCO3 ¯
It is reduced to calcium carbide when heated with coke or anthracite in an electric furnace:
2CaCO3+ 5C→(high temperature)→2CaC2+ 3CO2
一般的な説明
Calcium Carbonate (CaCO
3) is a naturally found material in chalk, limestone, and marble. It is composed of three elements which include carbon, oxygen, and calcium. It is formed by reacting carbon dioxide with slaked or burnt lime. It can be used for a variety of applications ranging from industrial, food to agriculture.
応用例（製薬）
Calcium carbonate (CaCO
3) can be found in clinical applications such as antacids, but not that an excessive intake can be hazardous.
A variety of calcium salts are used for clinical application, including calcium carbonate, calcium chloride,
calcium phosphate, calcium lactate, calcium aspartate and calcium gluconate. Calcium carbonate is the most
common and least expensive calcium supplement. It can be difficult to digest and may cause gas in some
people because of the reaction of stomach HCl with the carbonate and the subsequent production of CO
2.
Calcium carbonate is recommended to be taken with food, and the absorption rate in the intestine depends
on the pH levels. Taking magnesium salts with it can help prevent constipation. Calcium carbonate consists
of 40% Ca
2+, which means that 1000 mg of the salt contains around 400 mg of Ca
2+. Often, labels will only
indicate the amount of Ca
2+ present in each tablet and not the amount of calcium carbonate.
农业用途
Calcium carbonate (CaCO
3) is a naturally occurring
white solid that is sparingly soluble in water. It is most
commonly used to neutralize soil acidity to the required
level in a process called liming.
The major sources of calcium carbonate are calcitic
limestone, dolomitic limestone, marl, chalk and marble.
Calcium carbonate is made by passing carbon dioxide
(CO
2) into limewater. Pure calcium carbonate is assumed
to have a 100% neutralizing value. The values of other
liming materials are measured against the neutralizing
value of pure calcium carbonate. Calcium carbonate, on
heating, decomposes to give calcium oxide (quick lime)
and carbon dioxide.
Limestone, which consists mainly of calcium
carbonate, is called calcitic limestone or high calcium
limestone. Limestone containing more than 10%
magnesium carbonate is called dolomitic limestone or
dolomite. These forms contain about 12% magnesium.
Agricultural dolomitic limestone is a fine, grey to white
powder of a double carbonate of calcium and magnesium
with 12.8% magnesium and 17% calcium. The double
carbonate is much less soluble in water than the
individual carbonates.
安全性
Calcium carbonate is mainly used in oral pharmaceutical formulations
and is generally regarded as a nontoxic material. However,
calcium carbonate administered orally may cause constipation and
flatulence. Consumption of large quantities (4–60 g daily) may also
result in hypercalcemia or renal impairment. Therapeutically, oral
doses of up to about 1.5 g are employed as an antacid. In the
treatment of hyperphosphatemia in patients with chronic renal
failure, oral daily doses of 2.5–17 g have been used. Calcium
carbonate may interfere with the absorption of other drugs from the
gastrointestinal tract if administered concomitantly.
LD
50 (rat, oral): 6.45 g/kg
貯蔵
Calcium carbonate is stable and should be stored in a well-closed
container in a cool, dry place.
Structure and conformation
The space lattice of CaCO3 belongs to the triagonal system, and the sodium nitric acid structure has a space group of D
63d. It isarhombohedron crystal, with a basis comprising two molecules, and it has a lattice constant of a=0.636 nm, a=46°6'. Ca
1 positions (1/4, 1/4, 1/4), Ca
2 (3/4, 3/4, 3/4), C
3 (0, 0, 0) and C
4 (1/2, 1/2, 1/2), andCtakes the middle of Ca–Ca. The O atom positions the corner of the triangle, the plane of which is perpendicular to the optical axis, Ca–C–Ca–. This includes C and O3, as C4 shift position by 60° with the O3 of C3. The behavior of CO 2K 3 is different for light oscillating perpendicularly to the optical axis (O-ray) and light oscillating parallel to the axis (E-ray), which is the origin of the uniaxial negative crystal.
不和合性
Incompatible with acids and ammonium salts.
規制状況(Regulatory Status)
GRAS listed. Accepted for use as a food additive in Europe.
Included in the FDA Inactive Ingredients Database (buccal chewing
gum, oral capsules and tablets; otic solutions; respiratory inhalation
solutions). Included in nonparenteral medicines licensed in the UK.
Included in the Canadian List of Acceptable Non-medicinal
Ingredients.
炭酸カルシウム 上流と下流の製品情報
原材料
準備製品
Styrene-acrylic latex paint for exterior wall
二硝酸カルシウム·4水和物
1,3-ジフェニル-2-プロパノン
クロラゾール ブラック E
ビス(メタン酸)カルシウム
ビス[2-[2-メチル-2-[(ヘプタデシルカルボニル)オキシ]-1-オキソエトキシ]プロパン酸]カルシウム
latex paint
ソルビン酸カルシウム
4-(3-ブロモフェニル)モルホリン 臭化物
4-メチル-2-ヒドロキシベンゼンスルホン酸
Toothpaste
Acrylic latex paint for interior wall
Acrylic latex paint for exterior wall
Polysulfide sealant
臭化カルシウム
D,L-リンゴ酸
硝酸カルシウム
Polymyxin B, N-sulfomethyl deriv., sodium salt
Plastic products
珪灰石
プロピオン酸 カルシウム
7-アミノナフタレン-1,3,5-トリスルホン酸
硫酸ストロンチウム
2-ナフタレンスルホン酸ナトリウム
N-フェニル-3-ニトロ-4-アニリノベンゼンスルホンアミド
bastnasite
5-ブロモ-2-(1-ピペラジニル)ピリミジン 臭化物
アストロマイシン
カルシウム/3-ヒドロキシ-3,4-ジカルボキシブタノアート,(3:2)
Interior wall coating
フクシン
Flour improver
Chrom-tin-Pink Stannite Pigment
8-ヒドロキシ-1,1,7,7-テトラメチルジュロリジン-9-カルボキシアルデヒド
CALCIUM GLUCONATE MONOHYDRATE
D-(+)-シクロセリン
1,2,4-ブタントリオール
1-ヒドロキシブタン-2-オン
7-ヒドロキシ-8-[[4-[1-[4-[(4-ヒドロキシフェニル)アゾ]フェニル]シクロヘキシル]フェニル]アゾ]-1,3-ナフタレンジスルホン酸二ナトリウム
4,4`-di(a-methylbenzyl)diphenylamine