Sodium acetate
[CAS# 127-09-3]

Identification

• Classification: API >> Water, electrolyte and acid-base balance regulator >> Electrolyte balance regulator
• Name: Sodium acetate
• Synonyms: Sodium ethanoate; Acetic acid sodium salt
• Molecular Formula: C₂H₃NaO₂
• Molecular Weight: 82.03
• CAS Registry Number: 127-09-3
• EC Number: 204-823-8
• FEMA: 3024
• SMILES: CC(=O)[O-].[Na+]

Properties

• Solubility: Soluble 119% w/w (water 0 °C)
• Density: 1.528 g/mL (20 °C)
• Melting point: 300 °C (decomp.)
• Flash point: 250 °C

Safety Data

• Safety Statements: S24/25

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Eye irritation	Eye Irrit.	2	H319
Specific target organ toxicity - single exposure	STOT SE	2	H371
Acute toxicity	Acute Tox.	4	H332
Skin irritation	Skin Irrit.	2	H315
Acute toxicity	Acute Tox.	4	H302
Eye irritation	Eye Irrit.	2A	H319
Specific target organ toxicity - single exposure	STOT SE	3	H335

Discovery and Applications

Sodium acetate is a white, crystalline salt with the chemical formula CH3COONa. It is the sodium salt of acetic acid and is commonly encountered in both anhydrous and trihydrate forms. Sodium acetate has a long history of discovery and application, with its origins tracing back to early organic chemistry. The synthesis of sodium acetate was first achieved in the late 18th century when chemists began to explore the properties of organic acids and their derivatives. Since then, sodium acetate has become an important compound in various industrial, culinary, and pharmaceutical applications.

One of the primary applications of sodium acetate is in the food industry, where it serves as a food additive. It is widely used as a flavoring agent and preservative, imparting a mild, tangy taste to processed foods. Sodium acetate is particularly valued for its ability to enhance flavors while maintaining the stability of food products. It is commonly used in the production of snack foods, sauces, and pickled products. Additionally, its low sodium content makes it a preferable alternative to traditional salt, particularly in low-sodium formulations.

In the pharmaceutical sector, sodium acetate plays a critical role as an electrolyte and buffering agent. It is often included in intravenous (IV) solutions to help maintain proper fluid and electrolyte balance in patients. Sodium acetate can also be utilized in the treatment of metabolic acidosis, where it acts as a source of bicarbonate ions to help neutralize excess acidity in the bloodstream. Its ability to regulate pH levels is crucial in various medical applications, underscoring the importance of sodium acetate in healthcare.

Another significant application of sodium acetate lies in its use in laboratory and industrial processes. It is commonly used as a reagent in chemical reactions, particularly in organic synthesis. Sodium acetate serves as a catalyst and a source of acetate ions, facilitating various reactions, including esterifications and acylations. Furthermore, it is employed as a buffering agent in biochemical assays and laboratory procedures, helping to maintain stable pH conditions during experiments. The versatility of sodium acetate in different chemical contexts highlights its importance in both academic research and industrial applications.

Sodium acetate also finds use in thermal storage systems. It has a high heat of fusion, allowing it to store and release heat effectively. This property is utilized in the design of phase change materials (PCMs), which are integrated into energy-efficient building materials and systems. By using sodium acetate in PCMs, it is possible to regulate temperature fluctuations in buildings, enhancing energy efficiency and comfort.

The synthesis of sodium acetate can be achieved through the neutralization of acetic acid with sodium hydroxide or sodium bicarbonate. This reaction yields sodium acetate and water, and the resulting product can be crystallized to obtain pure sodium acetate. The production process is relatively straightforward and can be scaled up for commercial applications, ensuring a reliable supply of this important compound for various industries.

Despite its numerous applications, safety considerations should be taken into account when handling sodium acetate. While it is generally regarded as safe for consumption and use in pharmaceuticals, proper storage and handling practices should be observed to prevent contamination and ensure stability.

In conclusion, sodium acetate is a versatile chemical compound with diverse applications across the food, pharmaceutical, and industrial sectors. Its discovery marked a significant advancement in organic chemistry, and its continued use reflects the ongoing need for effective compounds in various applications. As research progresses, further exploration of sodium acetate’s potential uses and benefits is expected, contributing to innovations in multiple fields.

References

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