What is Linear Alkylbenzene Sulphonic Acid CAS 27176-87-0?

It is an anionic surfactant intermediate, commonly called LABSA or DDBSA. Industrial detergent grades are supplied as a brown to yellow viscous liquid with typical active matter of about 96% and the molecular formula C₁₈H₃₀O₃S.

How is LABSA related to Sodium Dodecylbenzenesulfonate?

LABSA is the acidic intermediate. Neutralization with sodium hydroxide or another suitable base converts it into sodium alkylbenzene sulfonate, which is the anionic surfactant actually used in many laundry, dishwashing, and cleaning formulations.

What are the main applications of LABSA?

It is used to manufacture laundry powders, liquid detergents, dishwashing liquids, household cleaners, industrial cleaners, emulsifiers, and textile auxiliaries. In most formulations it is first neutralized to the corresponding sulfonate salt.

What specifications should be checked before ordering?

Confirm active matter, free oil or unsulfated matter, free sulfuric acid or inorganic acid, color, density, and flow properties. For detergent production, the alkyl chain distribution and neutralization behavior should also be matched to the final formulation.

Why must LABSA be neutralized carefully?

Neutralization of LABSA with a base releases significant heat and can create highly alkaline or corrosive conditions if not controlled. The process should be carried out with cooling, agitation, and pH monitoring using suitable materials and equipment.

Linear Alkylbenzene Sulphonic Acid CAS 27176-87-0

Linear Alkylbenzene Sulphonic Acid (LABSA 96%), CAS 27176-87-0, is a high-activity anionic surfactant supplied as a key raw material for household and industrial detergents. Confirm active matter, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 27176-87-0
Synonyms: LABSA, Dodecylbenzenesulfonic acid, DDBSA, Alkylbenzene sulfonic acid, LABS acid
Einecs: 248-289-4
Molecular Formula: C₁₈H₃₀O₃S
Grade: industrial grade
Package: 210 kg / 215 kg plastic drum, bulk or customized packing on request

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Product Description

Linear Alkylbenzene Sulphonic Acid, CAS 27176-87-0, also known as LABSA or dodecylbenzenesulfonic acid (DDBSA), is an anionic surfactant intermediate; the EC/EINECS number is 248-289-4.

Synonyms: LABSA; dodecylbenzenesulfonic acid; DDBSA; alkylbenzene sulfonic acid; LABS acid.

CAS: 27176-87-0.

Molecular formula: C₁₈H₃₀O₃S.

Molecular weight: about 326.49 g/mol (typical dodecylbenzene sulfonic acid).

EC number: 248-289-4.

It is a brown to yellow viscous liquid at 25 °C, completely soluble in water and soluble in alcohols, glycol ethers and many organic solvents.

Active matter (as LABSA) is typically ≥96.0%; free oil ≤2.0% and free inorganic acid (as H₂SO₄) ≤1.5%.

Density at 20–25 °C is about 1.06 g/mL, pour point about 10 °C and pKa about 0.7; biodegradability is above 90%.

It is used to manufacture laundry powders, liquid detergents, dishwashing liquids and household or industrial cleaners.

It is used in emulsifiers and textile auxiliaries; in most formulations it is first neutralized to the sulfonate salt.

Neutralization with sodium hydroxide converts LABSA into sodium alkylbenzene sulfonate, the anionic surfactant used in cleaning formulations.

Neutralization releases significant heat and requires cooling, agitation and pH monitoring using suitable materials and equipment.

Confirm active matter, free oil, free sulfuric acid, color, density and flow properties; match the alkyl chain distribution to the final formulation.

Store in tightly closed, corrosion-resistant containers in a cool, dry, well-ventilated area away from moisture, alkalis, oxidizers and heat sources.

Confirm packaging with the requested quantity and destination requirements.

Document requirements should be confirmed from the current specification, SDS, COA or other product-specific files.

The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

For an RFQ, state the intended use, required specification, active matter, quantity, packaging, destination and document needs.

FAQ - Technical & Supply Chain

Q:
What is Linear Alkylbenzene Sulphonic Acid CAS 27176-87-0?

A: It is an anionic surfactant intermediate, commonly called LABSA or DDBSA. Industrial detergent grades are supplied as a brown to yellow viscous liquid with typical active matter of about 96% and the molecular formula C₁₈H₃₀O₃S.
Q:
How is LABSA related to Sodium Dodecylbenzenesulfonate?

A: LABSA is the acidic intermediate. Neutralization with sodium hydroxide or another suitable base converts it into sodium alkylbenzene sulfonate, which is the anionic surfactant actually used in many laundry, dishwashing, and cleaning formulations.
Q:
What are the main applications of LABSA?

A: It is used to manufacture laundry powders, liquid detergents, dishwashing liquids, household cleaners, industrial cleaners, emulsifiers, and textile auxiliaries. In most formulations it is first neutralized to the corresponding sulfonate salt.
Q:
What specifications should be checked before ordering?

A: Confirm active matter, free oil or unsulfated matter, free sulfuric acid or inorganic acid, color, density, and flow properties. For detergent production, the alkyl chain distribution and neutralization behavior should also be matched to the final formulation.
Q:
Why must LABSA be neutralized carefully?

A: Neutralization of LABSA with a base releases significant heat and can create highly alkaline or corrosive conditions if not controlled. The process should be carried out with cooling, agitation, and pH monitoring using suitable materials and equipment.
Q:
How should LABSA be stored and handled?

A: Store in tightly closed, corrosion-resistant containers in a cool, dry, well-ventilated area away from moisture, alkalis, oxidizers, and heat sources. Use acid-resistant PPE and handle spills or splashes according to the supplied safety guidance.

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