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Sodium nitrate

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Identification
Molecular formula
NaNO3
CAS number
7631-99-4
IUPAC name
sodium;nitrate
State
State

At room temperature, sodium nitrate is a solid. It is stable in nature and soluble in water.

Melting point (Celsius)
306.80
Melting point (Kelvin)
579.95
Boiling point (Celsius)
380.00
Boiling point (Kelvin)
653.15
General information
Molecular weight
84.99g/mol
Molar mass
84.9940g/mol
Density
2.2570g/cm3
Appearence

Sodium nitrate appears as a white crystalline solid. It is commonly found in the form of a powder or granulated crystals. The crystalline nature of sodium nitrate can give it a salt-like appearance, and it is odourless.

Comment on solubility

Solubility of Sodium Nitrate

Sodium nitrate (NaNO3) is a highly soluble compound in water. Its solubility characteristics can be highlighted as follows:

  • Solubility in Water: Sodium nitrate has a solubility of approximately 88 grams per liter (g/L) at room temperature. This makes it *easily dissolvable* in aqueous solutions.
  • Temperature Dependence: The solubility of sodium nitrate increases with temperature, which is typical for many salts. For example, at 60 °C, its solubility rises significantly to around 130 g/L.
  • Effect of pH: The solubility remains relatively constant across various pH levels, making it stable in different chemical environments.
  • Form of Crystalline Structure: Sodium nitrate crystallizes in a hexagonal form, which can affect the rate and manner of dissolution in water.

It is worth noting that sodium nitrate’s high solubility makes it useful in various applications, including fertilizers and food preservation. As one scientist quipped, “Where there’s water, NaNO3 will dissolve!” This characteristic is crucial for its effectiveness in practical applications, allowing rapid availability and uptake when in solution.


Interesting facts

Interesting Facts About Sodium Nitrate

Sodium nitrate, commonly referred to as a vital player in various fields, boasts a unique profile that is fascinating to both scientists and students alike. It is most recognized for its specific roles in agriculture, food preservation, and even as an industrial chemical.

Key Roles of Sodium Nitrate:

  • Agricultural Fertilizer: Sodium nitrate serves as a source of nitrogen, which is essential for plant growth. It provides an immediate nutrient supply, helping to enhance crop yield.
  • Food Preservation: Used in curing meats, sodium nitrate plays a crucial role in enhancing flavor and preserving color while preventing the growth of harmful bacteria.
  • Industrial Applications: This compound finds its way into manufacturing explosives and glass, showcasing its versatility beyond agricultural uses.

Historical Context:

The use of sodium nitrate dates back to ancient times when it was sourced from natural deposits, known as "niter." It was initially harvested for applications in medicine and food preservation. Today, its production occurs mainly through chemical processes, ensuring consistent supply for various uses.

Environmental Impact:

While sodium nitrate is beneficial in many areas, it’s important to recognize its environmental implications. Excessive use in fertilizers can lead to nutrient runoff, potentially contaminating waterways and causing issues like algae blooms.

Fun Fact:

Did you know that sodium nitrate is often called "Chilean saltpeter"? This name stems from its historical prevalence in Chile, where large deposits were mined in the 19th century!

In summary, sodium nitrate stands out due to its significant agricultural contributions, historical roots, and versatility in various industries. Its dual nature—as both a beneficial nutrient and an environmental concern—makes it an intriguing compound worthy of exploration.

Synonyms
SODIUM NITRATE
7631-99-4
Chile saltpeter
Cubic niter
Soda niter
Nitrate of soda
etabisulfite
Sodium saltpeter
Nitrate de sodium
Saltpeter (Chile)
Natrum nitricum
Sodium nitrate(DOT)
Caswell No. 781
Sodium(I) nitrate (1:1)
NaNO3
CCRIS 558
HSDB 726
UNII-8M4L3H2ZVZ
EINECS 231-554-3
8M4L3H2ZVZ
NSC 77390
EPA Pesticide Chemical Code 076104
INS NO.251
DTXSID6020937
CHEBI:63005
INS-251
NSC-77390
sodium trioxidonitrate(1-)
DTXCID60937
E-251
EC 231-554-3
SODIUM NITRATE (II)
SODIUM NITRATE [II]
Sodium nitrate, containing in the dry state more than 16,3 per cent by weight of nitrogen
SODIUM NITRATE (MART.)
SODIUM NITRATE [MART.]
INFLAMMATIONS
CUBIC NITRE
SODA NITRE
CHILEAN SALTPETRE
SODIUM NITRATE (DOT)
USEPA/OPP Pesticide Code: 76104
231-554-3
Nitrate, sodium
Nitric acid, sodium salt
Nitric acid sodium salt (1:1)
Nitric acid monosodium salt
sodium;nitrate
15621-57-5
MFCD00011119
Nitratite (Na(NO3))
CHEMBL1644698
Na (N O3)
sodiumnitrate
Chile salpeter
Saltpeter (Chile) (VAN)
Nitrate de sodium [French]
UN1498
Cubicniter
Natriumnitrat
Sodium nitrate (NaNO3)
SODIUM NITRATE [MI]
Sodium nitrate, ACS reagent
SODIUM NITRATE [FCC]
SODIUM NITRATE [HSDB]
NATRUM NITRICUM [HPUS]
SODIUM NITRATE [VANDF]
Sodium nitrate, LR, >=98%
SODIUM NITRATE [WHO-DD]
Sodium nitrate, ACS reagent grade
Sodium nitrate, analytical standard
Sodium nitrate, AR, >=99.5%
Tox21_202595
AKOS015902552
AKOS025243988
Sodium nitrate, BioXtra, >=99.0%
FS47121
Sodium nitrate, beads, 1-2 mm, 98%
NCGC00260143-01
Sodium nitrate [UN1498] [Oxidizer]
E251
Sodium nitrate, ACS reagent, >=99.0%
CAS-7631-99-4
DB-256117
Sodium nitrate, 99.999% (metals basis)
Sodium nitrate, BioUltra, >=99.0% (T)
NS00082173
Sodium nitrate, ReagentPlus(R), >=99.0%
Sodium nitrate, 99.995% trace metals basis
Sodium nitrate, SAJ first grade, >=99.0%
Sodium nitrate, JIS special grade, >=99.0%
Q184373
Sodium nitrate, >=99.0%, plant cell culture tested
Sodium nitrate, anhydrous, 99.995% trace metals basis
Nitrogen and oxygen isotopes in nitrate, NIST(R) RM 8569
Sodium nitrate, puriss. p.a., ACS reagent, reag. ISO, >=99.5%
Sodium nitrate, meets analytical specification of FCC, E251, 99.0-100.5%
Sodium nitrate, p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99%
Sodium nitrate, anhydrous, free-flowing, Redi-Dri(TM), ReagentPlus(R), >=99%