Potassium 2-ethylhexanoate
[CAS# 3164-85-0]

Identification

• Classification: Organic raw materials >> Organometallic compound >> Organic potassium
• Name: Potassium 2-ethylhexanoate
• Molecular Formula: C₈H₁₅KO₂
• Molecular Weight: 182.30
• CAS Registry Number: 3164-85-0
• EC Number: 221-625-7
• SMILES: CCCCC(CC)C(=O)[O-].[K+]

Safety Data

• Hazard Symbols: GHS05;GHS07 Danger
• Risk Statements: H315-H318-H319
• Safety Statements: P264-P264+P265-P280-P302+P352-P305+P351+P338-P305+P354+P338-P317-P321-P332+P317-P337+P317-P362+P364

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin irritation	Skin Irrit.	2	H315
Eye irritation	Eye Irrit.	2	H319
Serious eye damage	Eye Dam.	1	H318
Reproductive toxicity	Repr.	1B	H360D
Reproductive toxicity	Repr.	2	H361
Reproductive toxicity	Repr.	2	H361d
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Reproductive toxicity	Repr.	1B	H360Df
Chronic hazardous to the aquatic environment	Aquatic Chronic	4	H413

Discovery and Applications

Potassium 2-ethylhexanoate is a potassium salt derived from 2-ethylhexanoic acid, a branched-chain carboxylic acid commonly used in various industrial applications. The discovery of potassium 2-ethylhexanoate is rooted in the search for effective catalysts and stabilizers in chemical reactions and formulations, particularly in the field of polymer chemistry and coatings.

The synthesis of potassium 2-ethylhexanoate typically involves the neutralization of 2-ethylhexanoic acid with potassium hydroxide or potassium carbonate. This process results in the formation of the potassium salt, which retains the functional properties of the parent acid while offering enhanced solubility and reactivity due to the presence of the potassium ion. The compound was first identified in the mid-20th century when researchers were exploring the potential of metal carboxylates as catalysts for various chemical processes.

One of the primary applications of potassium 2-ethylhexanoate is as a catalyst in the production of polyurethanes. It plays a crucial role in the formation of isocyanate-terminated prepolymers by facilitating the reaction between polyols and isocyanates. This catalytic action helps to accelerate the curing process and improve the efficiency of polyurethane manufacturing, resulting in materials with desirable mechanical and thermal properties. The use of potassium 2-ethylhexanoate as a catalyst is particularly valued in the production of flexible foams, coatings, and adhesives.

In addition to its role as a catalyst, potassium 2-ethylhexanoate is also employed as a stabilizer in various formulations. It has been shown to enhance the stability of emulsions and dispersions, making it useful in the formulation of paints, coatings, and inks. The compound's ability to improve the dispersion of pigments and fillers contributes to the overall quality and performance of these products. Its use in coatings helps to ensure that the final product maintains its color and finish over time, even when exposed to environmental stressors.

Moreover, potassium 2-ethylhexanoate has been investigated for its potential applications in the field of agriculture. It can serve as a plant nutrient or growth regulator, contributing to the overall health and development of crops. The compound's role as a potassium source is essential, as potassium is a vital macronutrient required for various physiological processes in plants, including photosynthesis and enzyme activation. Research into the effectiveness of potassium 2-ethylhexanoate as a fertilizer additive continues to grow, highlighting its importance in sustainable agriculture.

Safety considerations are important when using potassium 2-ethylhexanoate in industrial and agricultural applications. Regulatory agencies assess the safety of such compounds to ensure they meet necessary health and environmental standards. Studies on the toxicity and environmental impact of potassium 2-ethylhexanoate are ongoing, emphasizing the importance of safe handling and usage practices.

In summary, potassium 2-ethylhexanoate is a versatile compound with significant applications in catalysis, stabilization of formulations, and agriculture. Its discovery and development have made it a valuable component in various industrial processes, contributing to improved efficiency and performance of products. As research continues to explore its potential uses, potassium 2-ethylhexanoate remains an essential compound in multiple fields.

References

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2010. Liquid nucleating additives for improving thermal insulating properties and mechanical strength of polyisocyanurate foams. Journal of Materials Science, 45(18).
DOI: 10.1007/s10853-010-4594-1