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亜硝酸カルシウム

亜硝酸カルシウム 化学構造式
13780-06-8
CAS番号.
13780-06-8
化学名:
亜硝酸カルシウム
别名:
亜硝酸カルシウム;亜硝酸カルシウム 溶液
英語化学名:
Calcium nitrite
英語别名:
Daraset;CALCIUM NITRITE;cium nitrite soL;Calcium dinitrite;Nitrousacid,calciumsalt;calcium nitrite solution;CALCIUM NITRITE ANHYDROUS;Calcium nitrite fandachem;CalciumNitriteCa(NO3)2*4H2O;Nitrous acid, calcium salt (2:1)
CBNumber:
CB6709679
化学式:
CaN2O4
分子量:
132.09
MOL File:
13780-06-8.mol

亜硝酸カルシウム 物理性質

融点 :
390 °C
比重(密度) :
2.23
屈折率 :
n20/D 1.3946
闪点 :
110 °C
外見 :
white-yellow hexagonal crystals
水溶解度 :
slightly soluble alcohol [MER06]; g/100g solution H2O: 38.3 (0°C), 43.0 (18.5°C), 71.2 (91°C); solid phase Ca(NO2)2 · 4H2O (0°C, 18.5°C), Ca(NO2)2 ·2H2O (91°C) [KRU93]
Merck :
13,1688
CAS データベース:
13780-06-8(CAS DataBase Reference)
EPAの化学物質情報:
Calcium nitrite (13780-06-8)

安全性情報

Sフレーズ  23-24/25
WGK Germany  3

亜硝酸カルシウム 価格 もっと(1)

メーカー 製品番号 製品説明 CAS番号 包装 価格 更新時間 購入
Sigma-Aldrich Japan 521051 亜硝酸カルシウム 溶液 30?wt. % in H2O
Calcium nitrite solution 30?wt. % in H2O
13780-06-8 1l ¥7000 2021-03-23 購入

亜硝酸カルシウム MSDS


Calcium nitrite

亜硝酸カルシウム 化学特性,用途語,生産方法

用途

潤滑油、コンクリート用の金属腐食防止剤. (MERCK 14TH, 2006)

説明

Calcium nitrite has the formula of Ca(NO2)2 and the molecular weight of 132.0894 g/mol. It can be made by the usual double decomposition reaction of sodium nitrite and CaCl2. It forms a tetrahydrate that is isomorphous with the strontium and barium salts:
2Na2NO2 (aq) + CaCl2 ? Ca(NO2)2 (aq) + 4NaCl (aq)

化学的特性

white or yellowish deliquescent, hexagonal crystal(s); prepared from nitric oxide and a mixture consisting of calcium ferrate and calcium nitrate; used to inhibit corrosion in lubricants and concrete [MER06]

物理的性質

Calcium nitrite, Ca(NO2)2, has the CAS number of 13780-06-8 and occurs as yellow-white crystals. It is very hygroscopic. Its density is 2.23 g/cm3 and it decomposes at 392°C to form nitrogen oxides and CaO. It is slightly soluble in alcohol. Ca(NO2)2·4H2O loses two waters of hydration at about 80°C and one at 105°C to form the monohydrate. It loses the other at about 155°C. The anhydrate, if further heated, is unstable and oxidizes to the nitrate in air above 220°C:
Ca(NO2)2 + O2 + heat?Ca(NO3)2

使用

Calcium nitrite has several industrial uses:
1. Calcium nitrite has high solubility, so can be used as a solution or powder in concrete as an “anti-freeze” during winter months as needed. Using this antifreeze at negative temperature can promote the hydration of minerals in cement, and the freezing point of operative temperature can be reduced to –25°C.
2. This salt is a steel rust inhibitor: calcium nitrite can clean steel and protect it from rust, and can protect steel material in concrete used to construct buildings and structures, to extend the useful life of concrete in buildings.
3. In concrete, Ca(NO2)2 acts as a coagulator: calcium nitrite is free of chlorine and alkali, capable to reduce alkali aggregation of concrete and improve its early strength and compressive resistance. The calcium nitrite protects steel reenforcing bars from chlorideinduced corrosion. One advantage to calcium nitrite is that its protection mechanism is well defined. Data are known that show the levels of chloride to which given levels of calcium nitrite will protect. Once corrosion initiates, the rates are lower with calcium nitrite present. These results have been used to produce reinforced concrete structures with durability in excess of 50–100 years.
4. Calcium nitrite can be used as corrosion inhibitor when added to lubricating agents.
5. Calcium nitrite can also be used in pharmaceutical, dyes and metallurgy industries, as a mild reducing agent.

使用

Corrosion inhibitor in lubricants, concrete.

製造方法

Industrially, calcium nitrite is manufactured by reacting “NOX” gas with “lime”:
Ca(OH)2 + NO +NO2?Ca(NO2)2 +H2O
By carefully controlling calciumnitrite conditions, the selectivity on converted lime, on a molar basis, is over 95% pure. It is soluble in water (98.2 g/100 ml at 20 °C) and the solution must be evaporated at low temperature to obtain the tetrahydrate. If heated with NO2 gas, it also form the nitrate:
Ca(NO2)2 + NO2?Ca(NO3)2 + NO
Anhydrous calcium nitrite is unstable and slowly oxidizes in air to form the nitrate. It is also soluble in alcohol at 0.97 g/100 ml at 20 °C.

純化方法

Crystallise it from hot water (1.4mL/g) by adding ethanol and cooling to give the hydrate. It is deliquescent. [Ray & Ogg J Am Chem Soc 79 265 1957.]

亜硝酸カルシウム 上流と下流の製品情報

原材料

準備製品


亜硝酸カルシウム 生産企業

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13780-06-8(亜硝酸カルシウム)キーワード:


  • 13780-06-8
  • Nitrous acid, calcium salt (2:1)
  • Nitrousacid,calciumsalt
  • CALCIUM NITRITE
  • CALCIUM NITRITE, 30 WT. % SOLUTION IN WA TER
  • CalciumNitriteCa(NO3)2*4H2O
  • calcium nitrite solution
  • CALCIUM NITRITE ANHYDROUS
  • Calcium dinitrite
  • Daraset
  • CalciuM nitrite solution 30 wt. % in H2O
  • cium nitrite soL
  • Calcium nitrite fandachem
  • Calcium nitrite ISO 9001:2015 REACH
  • 亜硝酸カルシウム
  • 亜硝酸カルシウム 溶液
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