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Calcium nitrite

Calcium nitrite structure

CAS No:
13780-06-8
Formula:
Ca.2HNO2
Chemical Name:
Calcium nitrite
Synonyms:
Nitrous acid,calcium salt (2:1);Nitrous acid,calcium salt;Calcium nitrite;Calcium nitrite (Ca(NO2)2);Calcium dinitrite;Daraset;DCI (corrosion inhibitor);DCI;DCI-S;CANI 30;182893-14-7
Categories:
Inorganic Chemistry > Inorganic Salts

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Calcium nitrite Basic Attributes

Molecular Weight：

132.09

Exact Mass：

131.948395

EC Number：

237-424-2

UNII：

F538343O0T

DSSTox ID：

DTXSID6065634

HScode：

3102909000

Characteristics

PSA：

105

XLogP3：

0.50120

Appearance：

DryPowder; DryPowder, Liquid; Liquid

Density：

2.23

Melting Point：

390 °C

Flash Point：

110 °C

Refractive Index：

n20/D 1.3946

Storage Conditions：

Keep tightly closed.

Safety Information

Transport codes：

NONH for all modes of transport

safety instructions：

23-24/25

Stability/Shelf Life：

Stable at normal temperatures and pressures.

Precautionary statement(s)：

P260, P264, P270, P307+P311, P314, P321, P405, P501

Hazard Statements：

H370

GHS Classification：

|Danger|H272 (31.15%): May intensify fire; oxidizer [Danger Oxidizing liquids; Oxidizing solids]|P201, P202, P210, P220, P221, P260, P264, P270, P273, P280, P281, P301+P310, P301+P312, P302+P352, P305+P351+P338, P308+P313, P309+P311, P312, P314, P321, P322, P330, P337+P313, P361, P363, P370+P378, P391, P405, and P501|Aggregated GHS information provided by 180 companies from 9 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]|P260, P264, P270, P307+P311, P314, P321, P405, and P501

Calcium nitrite Use and Manufacturing

Methods of Manufacturing

Industrial production mainly uses lime milk to absorb Nox to produce calcium nitrite. There are continuous method and batch method. The continuous method utilizes the discharge of nitrate-containing tail gas (containing NO+NO2 0.5%～1.5%) in the production process of dilute nitric acid or 5%～10%N0x mixed gas by air oxidation with air to control the molar ratio of NO and NO2 to About 1.5, it is led into the first-stage reactor at 40-70°C, and the gas and liquid are fully mixed and contacted, so that the lime milk continuously absorbs the Nox in the raw gas until the Nox content in the outlet gas is below 1.5%. The human air tower oxidizer, under the pressure of 75～100℃ and the pressure of 2～10kg/cm2, reacts with ammonia gas and excess NO2 to reduce the content of NO2. In the secondary reactor, the primary neutralization liquid continues to absorb the primary reactor tail gas until the Nox content drops below 0.3%, the pH of the solution is controlled above 11, and the secondary neutralization liquid contains 33.5% calcium nitrite. After filtration, the filtrate is evaporated and concentrated, cooled and crystallized, centrifuged, and dried to obtain a finished product of calcium nitrite. Its Ca(OH)2+NO+NO2→Ca(NO2)2·H2O

Uses

Corrosion inhibitor in lubricants, concrete.

Computed Properties

Molecular Weight:132.09
Hydrogen Bond Acceptor Count:6
Exact Mass:131.9483973
Monoisotopic Mass:131.9483973
Topological Polar Surface Area:105
Heavy Atom Count:7
Complexity:7.5
Covalently-Bonded Unit Count:3
Compound Is Canonicalized:Yes

Material

Calcium hydroxide

Calcium carbonate

Ammonia

Nitric acid

Nitrogen

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Guide of Calcium nitrite

Basic Attributes
Characteristics
Safety Information
Use and Manufacturing
Computed Properties
Material
Recommended Suppliers
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Calcium nitrite

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