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Calcium nitrate

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Calcium nitrate is a chemical compound with the formula Ca(NO3)2. It is a crystalline, water-soluble salt that is commonly used in various industrial and agricultural applications. The primary function of calcium nitrate is to provide a source of calcium and nitrate ions.

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Lab products found in correlation

Sodium nitrate, by Merck Group (5 mentions) Magnesium nitrate, by Merck Group (5 mentions) Potassium nitrate, by Merck Group (4 mentions) Sodium hydroxide (naoh), by Merck Group (4 mentions) Manganese chloride, by Merck Group (3 mentions) Strontium nitrate, by Merck Group (3 mentions) Nitric acid, by Merck Group (3 mentions) Silver nitrate, by Merck Group (3 mentions) Magnesium sulfate, by Merck Group (3 mentions) Zinc nitrate hexahydrate, by Merck Group (3 mentions) Ethyl acetate, by Merck Group (3 mentions) Tetraethyl orthosilicate, by Merck Group (3 mentions) Zinc nitrate, by Merck Group (2 mentions) Dopamine, by Merck Group (2 mentions) Ammonium phosphate, by Merck Group (2 mentions) Magnesium nitrate hexahydrate, by Merck Group (2 mentions) Nickel nitrate, by Merck Group (2 mentions) Calcium chloride dihydrate, by Merck Group (2 mentions) Pluronic p123, by Merck Group (2 mentions) Ammonium hydroxide, by Merck Group (2 mentions)

39 protocols using calcium nitrate

1

Epoxy Curing Kinetics with Calcium Nitrate

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Example 3

0.5 part calcium nitrate (50% in ethanol, Aldrich) is dissolved in 100 parts isophoronediamine (Evonik Industries) and 88 parts benzyl alcohol and 5 parts piperazine and this mixture is intimately mixed with 467 parts Epikote 828 (epoxy equivalent 190, Hexion) and a DSC is taken immediately thereafter.

0.5 part calcium nitrate (50% in ethanol, Aldrich) is dissolved in 100 parts isophoronediamine (Evonik Industries) and 88 parts benzyl alcohol and 20 parts piperazine and this mixture is intimately mixed with 534 parts Epikote 828 (epoxy equivalent 190, Hexion) and a DSC is taken immediately thereafter.

Results:

3a)3b)
Exothermic peak [° C.]8581
Onset [° C.]4838
Exothermic heat flow [J/g]354294
TG [° C.]9391

In experiment 3b), the exothermic peak is lower, as is the onset of this exothermic peak. The reactive composition 3b is thus more reactive than 3a. In 3a) the proportion of cyclic amines is less than 1% based on the overall formulation, and in 3b) more than 1%.

US11370876B2. Fast-curing epoxy systems (2022-06-28). Evonik Operations GmbH [None]. Inventors: Emmanouil Spyrou [DE], Dirk Fuchsmann [DE], Britta Kohlstruk [DE], Annette Sandkühler [DE].
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2

Quantifying Chromium in Plants via ICP-MS

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All chemicals were of analytical reagent grade. Deionized water (18.2 MΩ cm, Labconco, USA), LC-MS-grade methanol, and acetonitrile (MeCN) from Sigma (Milwaukee, USA) were used throughout.
The following Sigma-Aldrich reagents were used: potassium dichromate (Cr(VI)), formic acid, nitric acid, hydrogen peroxide, and sodium hypochlorite. Stock standard solution of chromium (1000 mg/L) was from Sigma and inductively coupled plasma mass spectrometry (ICP-MS) internal standard mix was from Agilent Technologies.
Hoagland's nutrient solution containing calcium nitrate 0.35 mM, calcium chloride 2.1 mM, magnesium sulfate 0.91 mM, monobasic potassium phosphate 0.97 mM, potassium nitrate 1.22 mM, boric acid 23 μM, manganese chloride 3.9 μM, molybdenum trioxide 23 μM, ferric nitrate 10 μM, zinc nitrate 0.6 μM, and copper sulfate 0.44 μM, pH 5.8, was prepared from Sigma reagents [22 ].
Sunflower seeds (Helianthus annuus L.) were purchased at a local garden market as a product of Vita company, distributed in Mexico by Rancho de Molinos, S.A. de C.V.
Gonzalez Ibarra A.A., Wrobel K., Yanez Barrientos E., Corrales Escobosa A.R., Gutierrez Corona J.F., Enciso Donis I, & Wrobel K. (2017). Changes of Metabolomic Profile in Helianthus annuus under Exposure to Chromium(VI) Studied by capHPLC-ESI-QTOF-MS and MS/MS. Journal of Analytical Methods in Chemistry, 2017, 3568621.
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3

Fluorescent DNA Sensor Development

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Calcium nitrate,
tin chloride, dopamine, acridine orange, l-cysteine, EDTA,
and tris hydrochloride buffer salt were obtained from Sigma-Aldrich.
The sensing-related DNA samples were procured from Integrated DNA
Technologies, and the DNA sequences used in this paper are listed
as follows.
DNA1: 3′-CTGGAAGGAAAGGAAGGCCTACTTCGACTACAGTCTCAG-5′
DNA2: 3′-TACGGATCGATGATCGGATCATCGCAGTCC-5′
DNA3: 3′-TAGGGTTGGGTATGGGAAGGGTCCCTCCAACCTATACCTTCCACCCA-5′
DNA4: 3′-TTAGGATCTGGTTACTCCGTCTACCT-5′
DNA5:
3′-TCGACGTAGCTATCGTACGCCTACCTCTA-5′
The stock
solution of aptamer was prepared by dissolving 50 mM
Tris-HCl buffer and stored at 4 °C. The nitrate salts of lead,
silver, mercury, calcium, and nickel, and the chloride salts of cobalt,
copper, barium, ferric, magnesium, ferrous, manganese, and other standard
chemicals were purchased at the highest purity levels from SRL and
Sigma-Aldrich (India). Throughout the experiment, deionized (DI) water
was used.
Amalraj A., Pavadai R, & Perumal P. (2021). Recyclable Target Metal-Enhanced Fluorometric Naked Eye Aptasensor for the Detection of Pb2+ and Ag+ Ions Based on the Structural Change of CaSnO3@PDANS-Constrained GC-Rich ssDNA. ACS Omega, 6(45), 30580-30597.
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4

Molten Salt Infused Separators for Batteries

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Lithium nitrate (LiNO3), potassium nitrate (KNO3), potassium nitrite (KNO2), sodium nitrate (NaNO3), calcium nitrate (Ca(NO3)2), and cesium nitrate (CsNO3) salts were purchased from Sigma-Aldrich (USA), with purity ≥ 99%, and vacuum-dried at 60 °C for 24 h. We used a specific eutectic composition of 15 mol% LiNO3, 30 mol% KNO3, 30 mol% CsNO3, 10 mol% NaNO3, and 15 mol% Ca(NO3)2 for the quinary-molten salt, and 37 mol% LiNO3, 39 mol% KNO2, and 24 mol% CsNO3 for the ternary-molten salt. The mixture was heated in a ceramic crucible with a torch32 (link). The glass microfiber (GF) separator (GF/C, Whatman, UK) with diameter 16 mm was then dipped in the molten eutectic salt (eutectic temperatures, Te: 75 and 98 °C for the quinary and ternary-molten salts, respectively, Supplementary Fig. 4) to infuse the GF separator and cooled to room temperature. The infused GF separator was dried at ~50 °C in vacuum in an oven for 12 h and transferred into an Ar-filled glove box. The mass of the infused electrolyte was ~160 mg.
Baek K., Jeon W.C., Woo S., Kim J.C., Lee J.G., An K., Kwak S.K, & Kang S.J. (2020). Synergistic effect of quinary molten salts and ruthenium catalyst for high-power-density lithium-carbon dioxide cell. Nature Communications, 11, 456.
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5

Synthesis and Characterization of Nanohydroxyapatite

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Calcium nitrate (Ca(NO3)2·4H2O; Sigma-Aldrich, St Louis, MO, USA) and ammonium phosphate ((NH4)3PO4·3H2O; Sigma-Aldrich) were separately dissolved in aqueous solution. The Calcium nitrate solution was dropped slowly into the ammonium phosphate solution while the solution was stirred and heated to 70°C. The pH value of the solution was maintained between 10 and 12 by adding ammonium hydroxide (NH4OH; Sigma-Aldrich). The chemical reaction formula was:
10Ca(NO3)2+6(NH4)3PO4+2NH4OH→pH>10Ca10(PO4)6(OH)2+20NH4NO3
When the reaction ended, nHA precipitate was obtained and thoroughly washed with deionized water, after which dimethylformamide (DMF; Sigma-Aldrich) was added gradually. The water in the precipitate solution was removed above 100°C; thus, the solvent became essentially DMF. Finally, the temperature was increased to 120°C and held for 2 hours. This procedure produced nHA, which was finally dried at 100°C for 12 hours to obtain nHA powder. The size and morphology of the nHA particles were characterized by transmission electron microscopy (TEM) using a JEM-100CX transmission electron microscope (JEOL, Tokyo, Japan).
Ma R., Tang S., Tan H., Lin W., Wang Y., Wei J., Zhao L, & Tang T. (2014). Preparation, characterization, and in vitro osteoblast functions of a nano-hydroxyapatite/polyetheretherketone biocomposite as orthopedic implant material. International Journal of Nanomedicine, 9, 3949-3961.
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6

Fluorescent Labeling of Biomolecules

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Dimethyl sulfoxide (DMSO) were obtained from Sigma-Aldrich. The fluorescent dye NHS-Rhodamine (MW: 528, Ex/Em wavelength: 552/575) and fluorescent dye removal columns were purchased from Thermo Scientific. Agar powder was acquired from Sd Fine Chemicals. An optical filter with a cutoff at 550 nm was purchased from Thorlabs for blocking the incident light. Poly(styrenesulfonate sodium salt) (PSS; MW = 70,000), poly(allylamine hydrochloride) (PAH; MW = 15,000), Ammonium bicarbonate ( ), Calcium Nitrate( ) and Sodium chloride (NaCl, 0.5 M) were purchased from Sigma-Aldrich.
Mohan K., Purnapatra S.B, & Mondal P.P. (2014). Three Dimensional Fluorescence Imaging Using Multiple Light-Sheet Microscopy. PLoS ONE, 9(6), e96551.
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7

Synthesis of Calcium Phosphate Biomaterials

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The following reagents were used: calcium nitrate (Ca(NO3)2·4H2O, >99% purity, Sigma Aldrich, Burlington, MA, USA); diammonium hydrogen phosphate ((NH4)2HPO4, 99.4% purity, Chempur, Piekary Śląskie, Poland); magnesium nitrate hexahydrate (Mg(NO3)2·6H2O, 99% purity, Sigma Aldrich); zinc nitrate hexahydrate (Zn(NO3)2·6H2O), >98% purity, Sigma Aldrich); strontium nitrate (Sr(NO3)2, 99.995% purity, Sigma Aldrich, Burlington, MA, USA); tetraethyl orthosilicate (TEOS, Si(OC2H5)4, 98% purity, Sigma Aldrich); silicon dioxide (SiO2, 99.5% trace metals basis, Sigma Aldrich); sorbitol (C6H14O6, ≥98% purity, Sigma Aldrich); PEG400 (Merck, Darmstadt, Germany); xanthan gum (C35H49O29, Sigma Aldrich); sodium lauryl sulfate (CH3(CH2)11OSO3Na, ≥99.0% purity, Sigma Aldrich). All reagents were of analytical grade and were used without any further purification.
Dobrota C.T., Florea A.D., Racz C.P., Tomoaia G., Soritau O., Avram A., Benea H.R., Rosoiu C.L., Mocanu A., Riga S., Kun A.Z, & Tomoaia-Cotisel M. (2024). Dynamics of Dental Enamel Surface Remineralization under the Action of Toothpastes with Substituted Hydroxyapatite and Birch Extract. Materials, 17(9), 2038.
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8

Bioactive Calcium Phosphate 3D Printing

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All reagents were purchased from Sigma-Aldrich: high-purity-grade calcium nitrate (Cat. No: 13477-34-4), ammonium carbonates (Cat. No: 506-87-6), ammonium phosphate monobasic (Cat. No: 7722-76-1), potassium carbonate-sodium carbonate mixture (Cat. No: 10424-09-6), and sodium acetate (Cat. No: 127-09-3).
Tricalcium phosphate powder was synthesized in an aqueous medium by slow addition of diammonium phosphate [(NH4)2HPO4] solution into calcium nitrate [Ca(NO3)24H2O] solution, containing NH4OH, under constant stirring. The pH of the mixture was about 7 with Ca/P molar ration of 1.5/1. After total addition of the reactants, the suspension was filtered, dried at 80°C and sintered at 700°C for 2 h. TCP agglomerates with mean size 40–80 μm were used for printing. TCP crystal aggregates were prepared by light grinding using a pestle and then passing through a standard testing sieve.
1.0% aqueous solution of salts of phosphoric acid (pH 4.75) was used as “ink” for the 3D printer. The buffer solution was prepared by dissolving in water of 1.5 ± 0.1M sodium acetate, 1.0 ± 0.1M phosphoric acid, and 0.15 ± 0.01M glutamic acid.
Komlev V.S., Popov V.K., Mironov A.V., Fedotov A.Y., Teterina A.Y., Smirnov I.V., Bozo I.Y., Rybko V.A, & Deev R.V. (2015). 3D Printing of Octacalcium Phosphate Bone Substitutes. Frontiers in Bioengineering and Biotechnology, 3, 81.
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9

Synthesis of Ceramic Precursor Solutions

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Calcium nitrate (99%), cerium nitrate (99%), nickel nitrate (98.5%), ammonium dihydrogen phosphate (99%), and ammonia solution (25 vol% aqueous) were purchased from Sigma-Aldrich and used without pretreatment.
Akri M., Zhao S., Li X., Zang K., Lee A.F., Isaacs M.A., Xi W., Gangarajula Y., Luo J., Ren Y., Cui Y.T., Li L., Su Y., Pan X., Wen W., Pan Y., Wilson K., Li L., Qiao B., Ishii H., Liao Y.F., Wang A., Wang X, & Zhang T. (2019). Atomically dispersed nickel as coke-resistant active sites for methane dry reforming. Nature Communications, 10, 5181.
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10

Fabrication of Mineralized Collagen Scaffolds

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Mineralized collagen-glycosaminoglycan scaffolds were fabricated via lyophilization from a mineralized collagen precursor suspension as described before.47 (link),65 ,66 The precursor suspension was created by homogenizing type I collagen (1.9 weight per volume, Sigma Aldrich, St. Louis, Missouri USA), chondroitin-6-sulfate (0.84 weight per volume, Sigma Aldrich), and calcium salts (calcium hydroxide and calcium nitrate, Sigma Aldrich) in a mineral buffer solution (0.1456 M phosphoric acid/0.037 M calcium hydroxide). The precursor suspension was stored at 4 °C and degassed prior to lyophilization.
Mineralized collagen scaffolds were fabricated via lyophilization using a Genesis freeze-dryer (VirTis, Gardener, New York USA) as described before.66 Briefly, 100 μL of precursor suspension was pipetted into a custom 144-well polysulfone mold (6 mm diameter, 7 mm tall wells). The precursor solution was frozen by cooling from 20 °C to −10 °C at a constant rate of 1 °C per minute followed by a temperature hold at −10 °C for 2 hours. The frozen suspension was then sublimated at 0 °C and 0.2 Torr, resulting in a porous scaffold network.
All scaffolds were hydrated for 2 hours in ethanol, cross-linked for 2 hours in EDC-NHS, and washed in phosphate buffered saline (PBS) for 48 hours prior to use in experiments.
Tiffany A.S., Dewey M.J, & Harley B.A. (2020). Sequential sequestrations increase the incorporation and retention of multiple growth factors in mineralized collagen scaffolds. RSC Advances, 10(45), 26982-26996.
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