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Sodium acetate is a chemical compound with formula CH3COONa, also abbreviated NaOAc.
Sodium acetate is the sodium salt of acetic acid.
Sodium acetate is colorless, deliquescent, and hygroscopic.
CAS: 127-09-3
MF: C2H3NaO2
MW: 82.03379
EINECS: 204-823-8
Synonyms
SODIUM ACETATE ANHYDROUS CELL CULTUR;Sodium acetate anhydrous for analysis EMSURE ACS,Reag. Ph Eur;femanumber3024;natriumaceticum;Niacet sodium acetate anhyd. tech;Octan sodny;octansodny;sodiiacetas
Sodium acetate is the sodium salt of acetic acid.
Sodium acetate appears as a colorless deliquescent salt with a wide range of applications.
In industry, Sodium acetate can be used in textile industry to neutralize sulfuric acid waste streams and as a photoresist upon using aniline dyes.
In concrete industry, it can be used as a concrete sealant to mitigate the water damage. In food, Sodium acetate can be used as a seasoning.
Sodium acetate can also be used as a buffer solution in lab.
In addition, Sodium acetate is also used in heating pads, hand warmers and hot ice.
For laboratory use, Sodium acetate can be produced by the reaction between acetate with the sodium carbonate, sodium bicarbonate and sodium hydroxide.
In industry, Sodium acetate is prepared from the glacial acetic acid and sodium hydroxide.
Sodium acetate is an organic sodium salt.
Sodium acetate contains an acetate.
Sodium Acetate is reported to inhibit the growth of Listeria monocytogenes.
Sodium acetate is the sodium salt of acetic acid, a white, crystalline substance that is highly soluble in water.
Sodium acetate is commonly used in various chemical, industrial, and laboratory applications.
Sodium Acetate Anhydrous is also known by alternate names such as Sodium Ethanoate or Acetic acid, sodium salt.
Sodium acetate is valued for its ability to act as a buffer, stabiliser, and in chemical synthesis, as well as its use in food preservation, heating pads, and as a reagent in laboratory processes.
Sodium acetate Chemical Properties
Melting point: >300 °C (dec.)(lit.)
density: 1.01 g/mL at 20 °C
refractive index: 1.4640
FEMA: 3024 | SODIUM ACETATE
Fp: >250 °C
storage temp.: Store at +5°C to +30°C.
solubility: H2O: 3 M at 20 °C, clear, colorless
form: powder
pka: 4.756[at 20 ℃]
Specific Gravity: 1.45
color: white
PH: 7.87(1 mM solution);8.33(10 mM solution);8.75(100 mM solution);9.04(1000 mM solution)
Odor: Slight acetic acid
PH Range: 8.5 - 9.9 at 246 g/l at 25 °C
Odor Type: odorless
biological source: synthetic
Water Solubility: 500 g/L (20 ºC)
Sensitive: Hygroscopic
Hydrolytic Sensitivity 0: forms stable aqueous solutions
λmax λ: 260 nm Amax: 0.03
λ: 280 nm Amax: 0.02
Merck: 14,8571
Boiling point: >400°C(decomposition)
BRN: 3595639
Stability: Stable. Incompatible with strong oxidizing agents, halogens. Moisture sensitive.
Cosmetics Ingredients Functions: BUFFERING
FRAGRANCE
InChI: 1S/C2H4O2.Na/c1-2(3)4;/h1H3,(H,3,4);/q;+1/p-1
InChIKey: VMHLLURERBWHNL-UHFFFAOYSA-M
LogP: -3.72
CAS DataBase Reference: 127-09-3(CAS DataBase Reference)
NIST Chemistry Reference: Sodium ethanoate(127-09-3)
EPA Substance Registry System:Sodium acetate (127-09-3)
Absorption: ≤0.01 at 260nm in H2O at 100mM
≤0.01 at 280nm in H2O at 100mM
Sodium acetate, CH3COONa, also abbreviated NaOAc , also sodium ethanoate, is the sodium salt of acetic acid, was made by the reaction of acetic acid with sodium carbonate.
Sodium acetate is soluble in water but less so in alcohol.
This colourless salt has a wide range of uses.
Sodium acetate was used as a pH modifier for toning baths.
Sodium acetate is odorless or has a faint acetous odor.
Sodium acetate effloresces in warm, dry air.
Anhydrous salt is a colorless crystalline solid; density 1.528 g/cm3; melts at 324°C; very soluble in water; moderately soluble in ethanol.
The colorless crystalline trihydrate has a density 1.45 g/cm3; decomposes at 58°C; is very soluble in water; pH of 0.1M aqueous solution is 8.9; moderately soluble in ethanol, 5.3 g/100mL.
Physical properties
Anhydrous salt is a colorless crystalline solid; density 1.528 g/cm3; melts at 324°C; very soluble in water; moderately soluble in ethanol.
The colorless crystalline trihydrate has a density 1.45 g/cm3; decomposes at 58°C; is very soluble in water; pH of 0.1M aqueous solution is 8.9; moderately soluble in ethanol, 5.3 g/100mL.
Uses
Sodium acetate is a mordant in dyeing. Other applications are in photography, as an additive to food, in purification of glucose, in preservation of meat, in tanning, and as a dehydrating agent.
In analytical chemistry Sodium acetate is used to prepare buffer solution.
Sodium acetate can be used to preserve processed meats and it is often used in combination with other acid based preservatives like lactates and propionates.
The typical inclusion level is 0.2 to 0.5%.
Sodium acetate is also used in salad dressings and ready-to-eat meals.
Sodium Acetate, Anhydrous is a source of acetic acid obtained as a granular powder.
it has a solubility of 1 g in 2 ml of water.
Industrial
Sodium acetate is used in the textile industry to neutralize sulfuric acid waste streams, and as a photoresist while using aniline dyes.
Sodium acetate is also a pickling agent in chrome tanning, and it helps to retard vulcanization of chloroprene in synthetic rubber production.
In processing cotton for disposable cotton pads, sodium acetate is used to eliminate the buildup of static electricity.
Concrete longevity
Sodium acetate is used to reduce the damage water can potentially do to concrete by acting as a concrete sealant, while also being environmentally benign and cheaper than the epoxy alternative that is usually employed for sealing concrete against water permeation.
Food
Sodium acetate may be added to foods as a seasoning.
Sodium acetate may be used in the form of sodium diacetate — a 1:1 complex of sodium acetate and acetic acid, given the E-number E262.
A frequent use is to impart a salt and vinegar flavor to potato chips.
Buffer solution
As the conjugate base of acetic acid, a solution of sodium acetate and acetic acid can act as a buffer to keep a relatively constant pH.
Heating pad
Sodium acetate is also used in consumer heating pads or hand warmers and is also used in hot ice.
Sodium acetate trihydrate crystals melt at 58.4°C , (to 58°C ) dissolving in their water of crystallization.
When they are heated to around 100°C, and subsequently allowed to cool, the aqueous solution becomes supersaturated.
Sodium acetate is capable of cooling to room temperature with out forming crystals.
Reactions
Sodium acetate can be used to form an ester with an alkyl halide such as bromo ethane:
CH3COONa + Br CH2CH3→ CH3COOCH2CH3+ NaBr
Caesium salts catalyze this reaction.
Preparation
Sodium acetate is prepared by reacting sodium hydroxide or sodium carbonate with acetic acid in aqueous solution.
The solution is evaporated to obtain hydrated crystals of sodium acetate.
NaOH + CH3COOH → CH3COONa + H2O
Na2CO3 + CH3COOH → 2CH3COONa + CO2 + H2O
Synthesis
For laboratory use, sodium acetate is very inexpensive, and is usually purchased instead of being synthesized.
Sodium acetate is sometimes produced in a laboratory experiment by the reaction of acetic acid (ethanoic acid) with sodium carbonate, sodium bicarbonate, or sodium hydroxide.
These reactions produce aqueous sodium acetate and water.
Carbon dioxide is produced in the reaction with sodium carbonate and bicarbonate, and it leaves the reaction vessel as a gas (unless the reaction vessel is pressurized).
This is the well-known "volcano" reaction between baking soda (sodium bicarbonate) and vinegar.
CH3COOH + NaHCO3 → CH3COONa + H2O + CO2
Industrially, sodium acetate is prepared from glacial acetic acid and sodium hydroxide.
CH3COOH + NaOH → CH3COONa + H2O.
Acetic acid plus sodium bicarbonate makes sodium acetate plus carbonic acid.
Produced by the neutralization of acetic acid with sodium bicarbonate, or by treating calcium acetate with sodium sulfate and sodium bicarbonate.
Reactivity Profile
When sodium acetate reacts with strong acids, irritating, noxious vapors of acetic acid are usually produced.
Sodium acetate is sufficiently basic to catalyze the violent polymerization of diketene, perhaps as well as other reactive dimers that are susceptible to polymerization in the presence of a mild base.
