Linear Alkyl Benzene Sulphonic Acid

Product Details

CasNo： 27176-87-0

MF： C18H30O3S

Appearance： liquid

Delivery Time： 15 days

Packing： 200kg/drum

Purity： 96%

1. Basic Information

• Chemical Name: Linear Alkylbenzene Sulfonic Acid (commonly known as Dodecylbenzene Sulfonic Acid, as its alkyl chain is mainly composed of C₁₂).
• Molecular Formula: Cn​H2n+1​C6​H4​SO3​H (where n is typically 10–14, with C₁₂ as the main component, meaning the alkyl chain is a linear C₁₀–C₁₄ alkyl group).
• CAS Number: 27176-87-0 (general CAS number for mixtures; specific carbon chain grades have unique CAS numbers, e.g., C₁₂ LAS: 1191-65-9).
• Appearance and State: Industrial-grade products are usually brown to dark brown viscous liquids (at high concentrations) or light brown transparent liquids (after refinement), with no obvious mechanical impurities and a slightly pungent odor (direct inhalation should be avoided).

2. Core Technical Indicators

LAS specifications vary slightly based on production processes and application scenarios. The following are general industrial-grade standards (taking 96% active matter concentration as an example):

3. Core Product Characteristics

Excellent Surface Activity and Detergency
LAS rapidly reduces the surface tension of water (from 72 mN/m to 30–35 mN/m) and exhibits strong emulsifying and dispersing capabilities for dirt such as oil stains, grease, and dust. It is particularly effective at removing stubborn stains from fabrics, tableware, and hard surfaces, making it the "core detergency component" in laundry powders and dishwashing liquids.

Good Compatibility and Stability
It can be well compounded with nonionic surfactants (e.g., AEO-9), cationic surfactants (e.g., benzalkonium chloride), and inorganic salts (e.g., sodium sulfate, sodium tripolyphosphate) without delamination or precipitation. It maintains stable performance over a wide temperature range (0–60℃), does not solidify at low temperatures, and does not decompose at high temperatures.

High Cost-Effectiveness and Wide Applicability
Compared with other anionic surfactants (e.g., AES, AOS), LAS has a mature production process and easily accessible raw materials, resulting in a lower cost per unit of effective component. It also retains good detergency in hard water (though its hard water resistance is slightly inferior to AES, this can be improved by compounding with chelating agents).

Compliant Biodegradability
Its linear structure allows it to be gradually degraded by natural microorganisms (degradation rate ≥ 90%, meeting the GB/T 15818-2021 standard). It does not accumulate in water bodies for a long time, making it environmentally friendly (distinguishing it from branched-chain alkylbenzene sulfonic acid, which is difficult to degrade).

4. Main Application Fields

LAS itself is strongly acidic; in practical applications, it must first be neutralized into salts (e.g., LAS sodium salt, LAS potassium salt) before being used in various products:

Household Detergent Field

2. • Laundry Powder / Liquid Laundry Detergent: Used as the primary surfactant (addition amount: 8%–15%) to provide core detergency, especially suitable for cleaning cotton, linen, and other fabrics.
   • Dishwashing Liquid: Compounded with nonionic surfactants (e.g., AEO-9) to enhance oil-removing ability, with an addition amount of 5%–10%.
   • Kitchen Grease Cleaners / Bathroom Cleaners: High-concentration LAS (10%–20%) is compounded with solvents to quickly dissolve heavy oil stains.
3.  

Industrial Cleaning Field

4. • Metal Cleaners: Used for removing oil stains from mechanical parts and equipment surfaces, replacing solvent-based cleaners to reduce environmental pressure.
   • Textile Dyeing Auxiliaries: Acts as a wetting agent and leveling agent to help dyes adhere evenly and improve fabric dyeing effects.
   • Leather Degreasing Agents: Removes grease from the surface of raw hides to prepare for subsequent tanning processes.
5.  

Other Fields

6. • Pesticide Emulsifiers: Compounded with nonionic surfactants to improve the dispersibility and adhesion of pesticide solutions.
   • Oilfield Auxiliaries: Used in drilling fluids and oil-displacing agents to reduce oil-water interfacial tension and improve crude oil recovery.

5. Packaging and Storage Requirements

Packaging Specifications

2. • Industrial Grade: Packaged in acid-resistant plastic drums (e.g., HDPE drums), with common specifications of 200 kg/drum and 1000 kg/IBC totes.
   • Refined Grade: Small-size packaging (25 kg/drum), suitable for laboratory use or small-batch compounding scenarios.
3.  

Storage Precautions

4. • Storage Environment: Store in a cool, well-ventilated, and dry warehouse, away from ignition sources and heat (avoid temperatures exceeding 40℃) and prevent direct sunlight.
   • Compatibility: Do not store with strong alkalis (e.g., NaOH) or strong oxidizers (e.g., hydrogen peroxide) to avoid violent reactions.
   • Safety Protection: Wear acid-resistant gloves and goggles during operation. If it comes into contact with skin or eyes accidentally, rinse immediately with a large amount of water.
   • Shelf Life: Under unopened conditions and in compliance with storage requirements, the shelf life is 12 months (once opened, use as soon as possible to prevent moisture absorption or contamination).