ChemicalBook > CAS DataBase List > Calcium nitrite

Calcium nitrite

Product Name
Calcium nitrite
CAS No.
13780-06-8
Chemical Name
Calcium nitrite
Synonyms
Daraset;CALCIUM NITRITE;cium nitrite soL;Calcium dinitrite;Nitrousacid,calciumsalt;calcium nitrite solution;CALCIUM NITRITE ANHYDROUS;CalciumNitriteCa(NO3)2*4H2O;Nitrous acid, calcium salt (2:1);Calcium nitrite ISO 9001:2015 REACH
CBNumber
CB6709679
Molecular Formula
CaN2O4
Formula Weight
132.09
MOL File
13780-06-8.mol
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Calcium nitrite Property

Melting point:
390 °C
Density 
2.23
refractive index 
n20/D 1.3946
Flash point:
110 °C
solubility 
slightly soluble in ethanol
form 
white-yellow hexagonal crystals
color 
white-yellow hexagonal, hexane crystals, crystalline; hygroscopic
Water Solubility 
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
LogP
-2.52 at 20℃
CAS DataBase Reference
13780-06-8(CAS DataBase Reference)
EPA Substance Registry System
Calcium nitrite (13780-06-8)
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Safety

Safety Statements 
23-24/25
WGK Germany 
3
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H301Toxic if swalloed

H318Causes serious eye damage

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P310Immediately call a POISON CENTER or doctor/physician.

P321Specific treatment (see … on this label).

P330Rinse mouth.

P405Store locked up.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
521051
Product name
Calcium nitrite solution
Purity
30 wt. % in H2O
Packaging
1l
Price
$49
Updated
2024/03/01
Biosynth Carbosynth
Product number
FC147193
Product name
Calcium nitrite
Packaging
2g
Price
$103
Updated
2021/12/16
Biosynth Carbosynth
Product number
FC147193
Product name
Calcium nitrite
Packaging
10g
Price
$357
Updated
2021/12/16
Biosynth Carbosynth
Product number
FC147193
Product name
Calcium nitrite
Packaging
25g
Price
$713
Updated
2021/12/16
AK Scientific
Product number
S472
Product name
Calcium nitrite solution
Packaging
25mL
Price
$27
Updated
2021/12/16
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Calcium nitrite Chemical Properties,Usage,Production

Description

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)

Chemical Properties

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]

Physical properties

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

Uses

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.

Uses

Corrosion inhibitor in lubricants, concrete.

Preparation

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.

General Description

Calcium nitrite solution (Ca(NO2)2) is widely utilized as a corrosion inhibitor. It protects the metal surface against chloride attack and increases the threshold level and improves the overall life of the concrete. Ca(NO2)2 does not change the mechanical properties of the cement.

Flammability and Explosibility

Not classified

Purification Methods

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.]

Calcium nitrite Preparation Products And Raw materials

Raw materials

Preparation Products

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View Lastest Price from Calcium nitrite manufacturers

Hebei Mojin Biotechnology Co., Ltd
Product
Calcium nitrite 13780-06-8
Price
US $0.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
50000KG/month
Release date
2023-09-20
Hebei Guanlang Biotechnology Co., Ltd.
Product
Calcium nitrite 13780-06-8
Price
US $0.00-0.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
500000kg
Release date
2022-12-16
Henan Bao Enluo International TradeCo.,LTD
Product
Calcium nitrite 13780-06-8
Price
US $100.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
500t/month
Release date
2023-07-26

13780-06-8, Calcium nitriteRelated Search:


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