Neodecanoic acid

Neodecanoic acid

Example components of neodecanoic acid
Identifiers
CAS Number	26896-20-8  Y
ECHA InfoCard	100.043.707
EC Number	248-093-9
UNII	GI044Q7IJ4  Y
CompTox Dashboard (EPA)	DTXSID7027916
Properties
Chemical formula	C10H20O2
Molar mass	172.268 g·mol−1
Appearance	Colorless liquid
Density	0.92
Melting point	-39 °C
Boiling point	243 - 253 °C
Solubility in water	Solubility in water, g/100ml at 25 °C: 0.025
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H315, H318, H319, H412
Flash point	122 °C (252 °F; 395 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Neodecanoic acid (NDA) is a mixture of carboxylic acids with the common chemical formula C₁₀H₂₀O₂. NDA is a colorless liquid with a relatively low vapor pressure and it's widely used in industrial synthesis processes. As mixture of constitutional isomers, we can identify some properties shared with trialkyl acetic acid by the following isomers: ^{[1] [2]}

• 2,2,3,5-Tetramethylhexanoic acid
• 2,4-Dimethyl-2-isopropylpentanoic acid
• 2,5-Dimethyl-2-ethylhexanoic acid
• 2,2-Dimethyloctanoic acid
• 2,2-Diethylhexanoic acid

Properties

Acidity

The proton of the carboxyl group (−COOH) of Neodecanoic acid can be separated with the reaction proceeding as follows:

RCOOH ⇌ RCO−2 + H⁺

With R being any aliphatic groups with 9 carbon atoms. Thanks to the release of the proton Neodecanoic acid have a weak acidic character. Being a monoprotic acid, it has only one dissociation, with the pK_a of the strongest acid form valued at 5.17. ^[3]

References

1. "NEODECANOIC ACID AS EXTRACTANT OF SELECTED" (PDF). www.journalssystem.com. Retrieved 2025-05-21.
2. "NEODECANOIC ACID". www.atamanchemicals.com. Retrieved 2025-05-21.
3. "Showing Compound Neodecanoic acid (FDB007903)" . Retrieved 2025-05-22.