What is sodium oleate?

Sodium oleate

, alias sodium octadecenoate, cis-9-octadecenol, oleyl alcohol, cis-9-octadecenol, (Z)-octadecenol, olive oil, cis -9-octadecen-1-ol, 9-n-octadecenol, octadecenol. It is an organic oil that has the chemical formula C17H33CO2Na. It’s the major component in olive oil soap and tallow soap. This can be produced by reacting sodium-hydroxide with oil. The compound is made up of two parts: one hydrophobic, the other hydrophilic. It is excellent at penetration, emulsification, and detergency. It can be used as an anionic fabric waterproofing agent and surfactant.

The basics of sodium Oleate

English name: SODIUM OLEATE

English as: cis-Oleate sodium, cis-9Octadecenoic Acid salt sodium salt and Oleic Acid salt sodium salt.

CAS number: 143-19-1

C18H33NaO2 is a molecular formula

Molecular weight: 304.44300

Accurate quality: 304.23800

PSA: 40.13000

LogP: 4.77380

Properties of sodium Oleate


Slowly, it can oxidize, color the air, turn the color darker or cause rancidity. The double bond between oleic and nonanal is also broken. Corruption is possible by mixing unsaturated acid with oleic acid.


Use 10 times as much water to dissolve the solution. It will foam up and become a viscous fluid. Aqueous solution will be alkaline. Partial hydrolysis results in the formation of sodium hydroxide and insoluble soap. The liquid then becomes milky. It is non-hy-drolyzed in ethanol, and it remains neutral. You can dissolve it in 20x the amount of alcohol. You can dissolve it in petroleum ether and in other organic solvents.

Hy-drolysis reaction: 2RCOONa+H2O=RCOONa*RCOOH+NaOH

Reaction chemical

To produce salt precipitation, reacts with other metal ions than the alkali metallics.

Others properties

It is not possible to volatilize general salt and it can also be fully dissociated with ions in water. After adding mineral acid, the salt can easily be made into hydroxy acid. If the soap liquid is kept cold it will not crystallize. It forms insoluble calcium or magnesium soap precipitates together with calcium and magnesium salts. It is white in appearance and has the following properties: density of 0.9g/cm3, melting point at 232-235degC (lit. ); boiling point is 359.999oC at 600 mmHg, flashpoint: 270.099oC. Not compatible with strong oxidizing agent. Temperature: -20°C

Preparation for sodium oleate

You can get it by neutralizing either sodium hydroxide (or sodium carbonate) in an oleic Acid ethanol solution.

Teng of the oleic acid may be dispersed in 100mL of 95% alcohol. Next, adjust with a 0.5mol/L sodium hydro-droxide solution. Use phenolphthalein to indicate. Once the solution reaches the equivalence level, precipitate can be used.

sodium Oleate

Soap is removed by filtering. You can get the raw product if it doesn’t precipitate after distilling the water and alcohol. Then, you can recrystallize the mixture of ethanol/ether.

Use sodium oleate

1. Soap made with olive oil also contains tallow soap as its main ingredient.

2. This product can be combined with ethylene dioxide and high boron alcohol to make a food coating.

3. Protective fabric made from mineral processing

4. This can be used to prevent corrosion in aluminum alloys, iron, and copper.

5. As an anionic surfactant, and as a fabric waterproofing agents


(aka. Buffalotours Nano Technology Co. Ltd., a trusted supplier and manufacturer of high-quality chemical materials, has over 12 years of experience. Our company’s sodium oleate is high in purity, fine particles size, and impure content. Thank you

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