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CAS NO: 127-09-3
E NO: E262
Sodium acetate (NaCH3COO) is the salt of acetic acid that has white crystalline powder appearance and is odorless normally, but whenever you warm it for analysis, it smells like vinegar. This product is soluble in water and the solubility increases with heating the water. NaCH3COO is also known as Sodium ethanoate and mostly use as seasoning substance in food industry.
|Molar Mass||82.034 g/mol|
|Melting point||324 ͦ C|
Sodium acetate produced when acetic acid and sodium carbonate react with each other.
CH3COOH + NaHCO3 → CH3COONa + H2CO3
NaOAC has a wide range of application, it is inexpensive and easy to keep because it doesn’t need a special condition. For example room temperature and dry places are suitable.
NaCH3COO is mostly use as food additive because it can preserve food from bacteria growth, neutralize the basic agents in food and can maintain the pH with its buffer properties.
This product can improve flavor and has no disadvantage for human.
For this application we should use more amount of sodium ethanoate and for longer time.
This gives a salty taste because of Na+ and a sour taste because the existence of CH3COO-
NaOAC as a buffer is used in laboratory for purification of nucleic acid that is very useful in compare with other products because of the price and preserving condition.
In this field the main reason for extracting DNA is positive charge of Na+ that attracts negative charge of phosphate in DNA.
Sodium acetate has many application in industry such as:
- Neutralization of acids
- Increasing the photo resistance in photography process
- Remove dust on metallic surfaces
- Use in tanning process
- Play role in manufacturing rubber and also concrete
- Emulsion and preserve cheese and yoghurt
- Has an important characteristic in textile industry for dyeing the cloth
Sodium acetate has application in biochemical researches, cosmetics, petroleum industry and medical field too.
Dangers of NaOAC
Inhalation: It can cause irritation, coughing or sore throat.
Ingestion: It has some symptoms like stomach ache and vomiting.
Skin contact: Redness and smart pain are symptoms of this contact and also it can be absorbed through the skin and it’s more harmful.
This salt can be damaging for environment too, it can pollute aquatic and dry parts of ecosystem.