Sodium Linear Alkylbenzene Sulfonate

Sodium Linear Alkylbenzene Sulfonate (LAS)

Chemical synonym: LAS, Sodium Dodecyl Benzene Sulphonate

Molecular Formula: R-C6H4-SO3Na, R:C10-C13 Alkyl

Properties: White or light Yellow fluid power granule

HS Code: 34021100

CAS No.: 25155-30-0

EINECS No.: 246-680-4

Sodium Linear Alkylbenzene Sulfonate (LAS) solved the problem of pollution in 1950s because it has much better biodegradation ratio than Branched Alkylbenzene Sulfonate, it its application domains were developed extensively.

Sodium Linear Alkylbenzene Sulfonate (LAS) is a widely used anionic surfactant, white or light yellow powder, soluble in water easily. LAS has superior function of detergency, wetting, foaming, emulsifying, dispersing etc. Biodegradation ratio is above 90%.

Sodium Linear Alkylbenzene Sulfonate (LAS) can be used as direct compound of daily or industrial detergents, such as laundry powder, concentrated detergent powder, solid detergents, paste detergents, slurry detergent. 

In textile industry, Sodium Linear Alkylbenzene Sulfonate (LAS) can be used as detergent, dyeing auxiliary agent, degreasing agent in electroplate industry, deinking agent in paper making industry, additive in fertilizer, and detergent, emulsifying agent, dispersing agent in many other industries. In construction industry LAS is used as cement additives, in petroleum industry LAS is used as drilling chemical.

Sodium Linear Alkylbenzene Sulfonate (LAS) has excellent emulsifying and dispersing performance, can be widely used for producing latex foaming gloves.

Producing process: Sulfonic acid be neutralized by liquid alkaline, drying, cooling and packing up.

Powder LAS is packed in pp bags, net weight 10 kg or 12.5 kg.

We have powder, liquid and paste forms Sodium Linear Alkylbenzene Sulfonate (LAS).

Powder LAS 30%, 40%, 50%, 60%, 70%, 80%, 85%, 80% crystal, 90%, 95%

Liquid LAS 30%, 40%, 50%;

Paste LAS 10-50%.

Powder LAS make a half-transparent solution in water.  

Liquid Sodium Linear Alkylbenzene Sulfonate (LAS) is ivory-white fluid liquid at room temperature, it becomes transparent liquid after heating. It has good performance of foaming, emulsifying, dispersing, detergency, working as comprehensive good performance surfactant. It has good biodegradation ratio. If store long time, it will become inhomogeneous and form different layers. However, its chemical properties doesn’t change after stirring and come back to conformity.

Sodium Linear Alkylbenzene Sulfonate (LAS) shows outstanding detergency effect on particulate dirt, protein dirt, oily dirt, especially the particulate dirt on natural fibre, its detergency performance increases as the increase on temperature, it works better than non-ionic surfactant on protein dirt, and create copious foams.

However, LAS has two impurities. 

One, it has low resistance of hard water. The detergency result decrease in hard water. So it must be used together with some suitable chelating agent, such as Sodium Tripolyphosphate (STPP). 

Two, it has strong degreasing power, irritative to skin during application, and the clothes do not have good hand feeling after washing. So LAS should be used together with some softener.

People always use AEO (fatty alcohol polyoxyethylene ether) as synergism surfactant of LAS.