| Identification | More | [Name]
Sodium acetate | [CAS]
127-09-3 | [Synonyms]
ACETIC ACID NA-SALT
ACETIC ACID SODIUM SALT
BUFFER SOLUTION
FEMA 3024
MAGGRAN(R) NA
MAGNESIA 87844
NA ACETATE
SODIUM ACETATE
SODIUM ACETATE (1,2-12C2)
SODIUM ACETATE BUFFER
SODIUM ACETATE BUFFER SOLUTION
sodium ethanoate
acetatedesodium
Acetic acid sodium salt anhydrous
Anhydrous sodium acetate
anhydroussodiumacetate
femanumber3024
Natriumacetat
natriumaceticum
Niacet sodium acetate anhyd. tech | [EINECS(EC#)]
204-823-8 | [Molecular Formula]
C2H3NaO2 | [MDL Number]
MFCD00012459 | [Molecular Weight]
82.03 | [MOL File]
127-09-3.mol |
| Chemical Properties | Back Directory | [Appearance]
White powder | [Melting point ]
>300 °C (dec.)(lit.)
| [density ]
1.01 g/mL at 20 °C
| [FEMA ]
3024 | [refractive index ]
1.4640 | [Fp ]
>250 °C | [storage temp. ]
2-8°C
| [solubility ]
H2O: 3 M at 20 °C, clear, colorless
| [form ]
powder
| [pka]
4.756[at 20 ℃] | [color ]
white
| [Specific Gravity]
1.45 | [Odor]
Slight acetic acid | [PH]
8.9 (25℃, 100mg/mL in water, 0.1 M agueous sodium acetate solution) | [PH Range]
8.5 - 9.9 at 246 g/l at 25 °C | [Stability:]
Stable. Incompatible with strong oxidizing agents, halogens. Moisture sensitive. | [Odor Type]
odorless | [Water Solubility ]
500 g/L (20 ºC) | [Hydrolytic Sensitivity]
0: forms stable aqueous solutions | [Sensitive ]
Hygroscopic | [λmax]
λ: 260 nm Amax: 0.03
λ: 280 nm Amax: 0.02 | [Merck ]
14,8571 | [Boiling point ]
>400°C(decomposition) | [BRN ]
3595639 | [InChIKey]
VMHLLURERBWHNL-UHFFFAOYSA-M | [LogP]
-3.72 | [Uses]
This colorless crystal, also known as sodium ethanoate or
acetate of soda, was made by the reaction of acetic acid with
sodium carbonate. It is soluble in water but less so in alcohol.
Sodium acetate was used as a pH modifier for toning baths. | [CAS DataBase Reference]
127-09-3(CAS DataBase Reference) | [NIST Chemistry Reference]
Sodium ethanoate(127-09-3) | [EPA Substance Registry System]
127-09-3(EPA Substance) |
| Safety Data | Back Directory | [Safety Statements ]
S22:Do not breathe dust .
S24/25:Avoid contact with skin and eyes . | [WGK Germany ]
1
| [RTECS ]
AJ4300010
| [F ]
3 | [Autoignition Temperature]
607 °C | [TSCA ]
Yes | [HS Code ]
29152200 | [Safety Profile]
Poison by intravenous route. Moderately toxic by ingestion. A skin and eye irritant. Migrates to food from packagmg materials. Violent reaction with F2, m03, diketene. When heated to decomposition it emits toxic fumes of Na2O. | [Hazardous Substances Data]
127-09-3(Hazardous Substances Data) | [Toxicity]
LD50 orally in Rabbit: 3530 mg/kg LD50 dermal Rabbit > 10000 mg/kg |
| Questions and Answers (Q&A) | Back Directory | [Description]
Sodium acetate (CH3COONa,127-09-3) is the sodium salt of acetic acid. It appears as a colorless deliquescent salt with a wide range of applications. In industry, it 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, it can be used as a seasoning. It can also be used as a buffer solution in lab. In addition, it is also used in heating pads, hand warmers and hot ice. For laboratory use, it can be produced by the reaction between acetate with the sodium carbonate, sodium bicarbonate and sodium hydroxide. In industry, it is prepared from the glacial acetic acid and sodium hydroxide.
| [Chemical Properties]
Sodium acetate, NaC2H302, is a colorless,efflorescent crystal,soluble in water and ether.Its melting point is 324°C.
The anhydrous salt is hygroscopic and forms with water a trihydrate, CH3COONa·3H20 which loses its water of crystallization completely at 3%K. What is left is the anhydrous salt as a white flaky powder.It dissolves easily in water with temperature reduction and is virtually completely hydrolyzed in water. The solution shows slightly alkaline reaction.
Sodium acetate is prepared by neutralizing aceticacid with sodium hydroxide. The trihydrate crystallizes from the solution below 58°C, The anhydrous salt is prepared by crystallization above 58°C and drying in vacuo. The hydrate is used because it is cheaper and dissolves rapidly in water,
| [Uses]
Sodium acetate(127-09-3) is the most-used alkali metal acetate, The largest amounts are used in medicine as an electrolyte for artificial kidneys and for artificial feeding.It is employed as a buffer substance and corrosion inhibitor, An hydrous sodium acetate,in organic chemistry, is a mildde hydrating agent and a catalyst,for example in the synthesis of cinnamic acid from benzalde hydeand acetic acid. Other fields of application are in the textile industry(dyeing of wool), the tanneries,food preservation, the photographic industry.
| [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.
| [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
|
| Hazard Information | Back Directory | [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. | [Occurrence]
Acetic acid or acetates are present in most plant and animal tissues in small, but detectable amounts | [Application]
2 - 1 - Industrial
Sodium acetate(127-09-3) is used in the textile industry to neutralize sulfuric acid waste streams, and as a photoresist while using aniline dyes. It 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.
2 - 2 - 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.
2 - 3 - Food
Sodium acetate may be added to foods as a seasoning. It 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.
2 - 4 - 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.
2 - 5 - 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. This solution is capable of cooling to room temperature with out forming crystals.
| [Definition]
A white
solid prepared by the neutralization of
ethanoic acid with either sodium carbonate
or sodium hydroxide. Sodium ethanoate
reacts with sulfuric acid to form sodium
hydrogensulfate and ethanoic acid; with
sodium hydroxide it gives rise to sodium
carbonate and methane. Sodium ethanoate
is used in the dyeing industry. | [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. | [General Description]
Sodium Acetate is reported to inhibit the growth of Listeria monocytogenes. | [Flammability and Explosibility]
Nonflammable | [Biological Activity]
Commonly used laboratory reagent | [Synthesis]
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. | [Purification Methods]
Crystallise it from acetic acid and keep it under vacuum for 10hours at 120o. Alternatively, it is crystallised from aqueous EtOH, as the trihydrate. This material can be converted to anhydrous salt by heating slowly in a porcelain, nickel or iron dish, so that the salt liquefies. Steam is evolved and the mass again solidifies. Heating is now increased so that the salt melts again. (NB: if it is heated too strongly, the salt can char; avoid this.) After several minutes, the salt is allowed to solidify and is cooled to a convenient temperature (in a desiccator) before being powdered and bottled. The water content should now be less than 0.02%. [Beilstein 2 II 113, 2 III 184, 2 IV 109.] |
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