Sodium 4-[(Octadecylamino)carbonyl]benzoate CAS 5994-45-6 Amide Soap Type Lubricating Grease Thickener

Product Overview

Sodium 4-[(octadecylamino)carbonyl]benzoate is a long chain alkyl amide carboxylate sodium salt of the amide soap family, with the molecular formula C26H42NNaO3 and a molecular weight of 439.6 g/mol. It is a solid anionic surface active compound best known as a thickener for lubricating greases, where it builds a stable grease structure in mineral, ester and synthetic base oils.

Key Attributes

Key Highlights

• PROVEN GREASE THICKENER: Alkyl terephthalamic acid sodium salts have an established record as thickeners for lubricating greases, dispersing in mineral, ester and polyalphaolefin base oils.
• THERMALLY ROBUST STRUCTURE: The aromatic amide linkage combined with a linear C18 alkyl tail gives the grease structure good mechanical stability and colloidal stability at elevated service temperatures.
• BASE OIL COMPATIBILITY: The long octadecyl chain provides strong affinity with non polar base oils, supporting uniform dispersion during grease manufacture.
• HYDROLYTIC STABILITY: The amide linkage is less prone to hydrolysis than an ester bond. Conventional fatty acid sodium soap greases lose thickening power as the soap fibres hydrolyse, which limits their use in wet service, so amide soap structures are generally preferred where water contact is expected.
• FLEXIBLE ORDER QUANTITY: Minimum order quantity of 1 kg supports formulation trials and pilot batches, with scale up to industrial drum quantities.
• DOCUMENTED BATCHES: A Certificate of Analysis is supplied with every shipment, and technical documentation is available on request.

Product Description

Sodium 4-[(octadecylamino)carbonyl]benzoate, also described in the literature as the monosodium salt of N-octadecylterephthalamic acid, is an aromatic amide carboxylate carrying a straight chain octadecyl group on the amide nitrogen. It is prepared by the condensation of octadecylamine with a terephthalic acid derivative followed by neutralisation with a sodium base. The product is supplied as a solid for incorporation into grease formulations and for use as a specialty chemical building block.

The molecular architecture is what defines its performance. The rigid terephthalic amide segment acts as a thermally stable anchor, while the C18 alkyl chain extends into the base oil phase and creates the fibrous network that gives grease its body and its resistance to mechanical working. Because the amide bond is far less susceptible to hydrolysis than an ester linkage, grease structures built on this chemistry retain their consistency where fatty acid soaps would soften. Published tribology work on octadecyl amide sodium carboxylate thickeners also reports improved extreme pressure behaviour and a positive contribution to friction reduction.

Published formulations for terephthalate type grease thickeners report addition levels broadly in the range of 7 to 25 percent of the total formulation, depending on the target consistency and the viscosity of the base oil. The thickener is charged into the base oil at ambient temperature, then heated under stirring to complete dispersion and build the grease structure before cooling. The optimum level for a specific system should be confirmed by bench trial.

Dideu Group is a supplier specializing in fine chemicals and specialty chemical additives. This product is offered with a minimum order quantity of 1 kg and a lead time within 2 weeks, shipped by air or by sea. A Certificate of Analysis is supplied with each batch, and technical documentation is available on request.

Applications

Lubricants and Greases

The principal established application. Alkyl terephthalamic acid sodium salts serve as thickeners for lubricating greases, producing the amide sodium grease family. These greases are used where good mechanical stability, good colloidal stability and elevated temperature service are required, including rolling and sliding bearings, heavily loaded low speed bearings, crank mechanisms, brake equipment, large winches and universal joints.

High Temperature and Long Life Grease Formulations

Used with synthetic base oils such as polyalphaolefins and esters for long life grease formulations, frequently in combination with antioxidants and rust inhibitors. The amide soap structure supports grease stability under prolonged thermal and mechanical working.

Research and Analytical Reference

Used as a reference compound in studies of amide soap thickener chemistry, including work relating thickener molecular structure to grease penetration, dropping point, oil separation and tribological performance.

Potential Applications

The following directions are inferred from the molecular structure and from the behaviour of closely related long chain amide soap compounds, rather than from documented use of this specific substance. They should be validated by the formulator before adoption.

• May be evaluated as a surface active agent in industrial cleaning and emulsification systems, given its anionic carboxylate head group and long hydrophobic tail.
• May be used in textile and leather auxiliary formulations, where long chain amide soaps are applied for softening, lubricating and antistatic effects.
• May be a candidate for water repellent and release agent compositions, by analogy with other long chain alkyl carboxylate salts.
• May be used as an intermediate for further derivation of the aromatic amide carboxylate structure in specialty chemical synthesis.

Specifications

Batch specific analytical data are reported on the Certificate of Analysis accompanying each shipment. Additional test items can be agreed with the buyer before order confirmation.

Packaging and Shipping

Storage Advice

• Keep the container tightly closed when not in use.
• Store in a cool, dry and well ventilated place.
• Protect from moisture and direct sunlight.
• Keep away from heat sources.

Shipping

Shipped by air or by sea according to order volume and destination. Lead time is within 2 weeks from order confirmation. Payment terms are T/T and L/C.

Company Profile

Dideu Group is a professional supplier of fine chemicals and specialty chemicals, serving customers in global markets with a full range of products from lab scale quantities to industrial volumes. Our portfolio covers lubricant additives, specialty surfactants and pharmaceutical and agrochemical intermediates for research and production use. We work directly with formulation teams and procurement departments, providing technical documentation and batch specific analytical data to support qualification and scale up. Every shipment is accompanied by a Certificate of Analysis, and our team responds to technical enquiries promptly.

FAQ

What is the minimum order quantity?

Dideu accepts orders from 1 kg, which allows formulators to run grease trials and pilot batches before scaling up to drum quantities.

What is the lead time?

Lead time is within 2 weeks from order confirmation.

What packaging options do you offer?

Standard packaging is a 25 kg fiber drum with inner liner or a 20 to 25 kg kraft paper bag with inner liner. Packaging can be adapted to buyer requirements.

What payment terms do you accept?

Dideu accepts T/T and L/C.

Do you provide a COA and technical documents?

Yes. A Certificate of Analysis is supplied with every batch, and technical documentation is available on request.

How do you ship the goods?

Goods are shipped by air or by sea depending on order volume and destination. Dideu coordinates the transport arrangement with the buyer before dispatch.

What addition level is used in grease formulations?

Published formulations for terephthalate type grease thickeners report addition levels broadly in the range of 7 to 25 percent of the total formulation, depending on the target consistency and the base oil viscosity. Dideu can discuss a recommended starting point for a specific base oil system, to be confirmed by bench trial.