STEARYLAMINE
EC / List no.: 204-695-3
CAS no.: 124-30-1
Mol. formula: C18H39N
Composition: Primary alkylamine
Product features:
Exterior / 20°C: white to yellow solid
Density / 60 °C (DIN 51 757): approx. 0.79 g/cm³
Viscosity / 80 °C (Höppler): < 5 mPa s
Flashpoint (DIN/ISO 2592): > 150 °C
Stearylamine is a primary amine used as an intermediate for polyurea greases.
Stearylamine is a Precursor for Cationic surfactants, Pigment grinding aids, Anticaking agents, and Amphoteric surfactants with a high content of primary amine
Stearylamine is almost insoluble in water but can absorb water to form hydrates.
Stearylamine is soluble in many polar and non-polar organic solvents such as mineral oils, fats, alcohols, aliphatic and aromatic hydrocarbons, and other organic substances such as bitumen or tar.
Synonyms of Stearylamine: Octadecylamine, 1-Aminooctadecane, Octadecan-1-amine, Stearamine, 1-Aminooctadecane, Monooctadecylamine, n-Octadecylamine, Stearamine, n-Stearylamine, Stearyl amine, 1-Octadecylamine, Octadecylamine, 1-octadecanamine
Applications of Stearylamine:
Stearylamine is an ingredient of Cationic surfactants used as disinfectants, fungicides, and antiseptics.
Stearylamine is an ingredient of Amphoteric surfactants and Amine oxides used as antistatic agents, textile scouring agents, ingredients for low-irritation shampoo, liquid detergents, and foam boosters.
Stearylamine is an ingredient of Corrosion inhibitors, asphalt emulsifier Dispersants, lubricants, and water treatment agents.
Stearylamine finds use in the formulations of Pigment grinding aids, Corrosion inhibitors and asphalt emulsifiers, Anticaking agents, dispersants, lubricants, and water treatment agents.
Amphoteric surfactants and Amine oxides (antistatic agent, textile scouring agent, ingredient for low irritation shampoo, liquid detergent, foam booster, oil recovery agent) may contain Stearylamine.
Stearylamine is an aliphatic amine intended for cosmetic formulations as an antistatic agent.
In cosmetics and personal care products, Lauramine and Stearylamine have been used in hair preparations.
Stearylamine is also used as a corrosion-inhibiting boiler-water additive.
Stearylamine has antimicrobial properties.
Stearylamine has been shown to prevent drug (lansoprazole) degradation and maintain drug stability in nanostructured lipid carriers (NLCs).
Stearylamine is used as a positive charge-inducing agent in different pharmaceutical formulations.
Thus, stearylamine reduced the permeability coefficient for the cationic species of the drugs by approximately an order of magnitude but did not affect the neutral species of the drugs.
The efflux curves observed for both verapamil and prochlorperazine could be mathematically modeled by assuming that the primary influence of stearylamine was on the development of a positive surface charge density on the inner monolayer of the liposome.
These results indicate that stearylamine effectively decreases the leakage of cationic drugs from liposomes and may prove to be a valuable component of liposomal drug formulations.
Stearylamine is mainly used in a water-soluble form (acetate or hydrochloride) for the flotation of KCl.
The acetates essentially have better solubility in water than the hydrochlorides.
However, the hydrochlorides are often preferred and prepared directly in the flotation system.
Although Stearylamine has foaming properties in addition to its collecting properties, foamers are also used.
The amount of foamer used is 20-50 g/t.
Preparation of an aqueous Stearylamine solution
To produce an aqueous Stearylamine solution, hot water (approx. 90 °C) is placed in a stirring container.
Stearylamine is stirred directly from the melt into the water.
The equivalent amount of acetic acid (24 kg of 100% acetic acid per 100 kg of Stearylamine) or hydrochloric acid (38 kg of 37% hydrochloric acid per 100 kg of Stearylamine) is added while stirring.
The aqueous solution should be stirred for another 30 minutes before use.
This then results in a homogeneous, thin, and somewhat cloudy solution.
If the amine solution is to be mixed with Alkyl polyglycol ether, we recommend adding this foamer last to the amine salt solution.
The solution is water-clear at approx. 90 °C.
We recommend setting the amine concentration to 1-5%.
More concentrated solutions are viscous and can cause difficulties during pumping and dosing steps.
Below 40 °C, the solution becomes viscous and cloudy.
Due to the high interfacial activity, solutions of fatty amine salts tend to foam.
Therefore, the solution should only be stirred slightly while stirring in stearylamine, and the air entry should be avoided.
Experience has shown that cloudy amine solutions are less selective, and the specific consumption increases.
Stearylamine solutions should be prepared fresh daily.
Due to the aggressive properties of acidic amine salt solutions, preparation vessels, and heating cables must be particularly protected against corrosion. Steel coated with PTFE and V4A steel are suitable materials for this application.
Translated names
octadécylamine (fr)
oktadecylamin (no)
IUPAC names
1-Aminooctadecane
1-Octadecanamin
1-Octadecanamine
1-octadecylamine
n-octadecylamine
Octadecan-1-amine
octadecan-1-amine
Octadecylamine
octadecylamine
Octadecylamine
stearyl amine
Stearyl amine
stearyl amine
Stearylamine
Trade names
1-Octadecylamine
Rofamin ST
Rofamin STD
Genamin SH 100
Genamin SH 100 D