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Dodecylbenzenesulfonic acid

Dodecylbenzenesulfonic acid
CAS No.: 27176-87-0
Molecular Formula: C18H30O3S
Molecular Weight: 348.47583
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Product Introduction

Dodecylbenzenesulfonic acid is an important anionic surfactant. It typically appears as a viscous brown liquid, characterized by strong acidity as well as excellent detergency and foaming properties. Due to the presence of a long-chain alkyl group and a hydrophilic sulfonic acid group in its molecular structure, it can significantly reduce the surface tension of water and exhibits excellent emulsifying and wetting capabilities.


CHEMICAL PROPERTIES

PropertyValue
Melting point10°C
Boiling point82 °C
Density1.06 g/mL at 20 °C (lit.)
Vapor pressure0 Pa at 25°C
Refractive indexn20/D 1.51
Flash point85 °F
Storage condition2-8°C
SolubilitySoluble in water, alcohol,   glycol ethers, glycol, ketones, aromatics and aliphatic hydrocarbons
Acidity coefficient (pKa)0.7 [at 20 °C]
FormColorless solution
ColorColorless to light yellow
Water solubility100 mg/L at 25°C
StabilityStable. Hygroscopic. Incompatible with bases, oxidizing agents, metals.
Cosmetic ingredient functionSURFACTANT - CLEANSING CLEANSING
InChI1S/C18H30O3S/ c1-2-3-4-5-6-7-8-9-10-11-12-17-13-15-18 (16-14-17)22(19,20)21/ h13-16H,2-12H2,1H3,(H, 19,20,21)
InChIKeyKWXICGTUELOLSQ-UHFFFAOYSA-N
SMILESCC(C)(CCCCCCCCO)C1CCC(c1)S(O)(=O)=O
LogP4.78 at 25°C
CAS database27176-87-0 (CAS DataBase Reference)
EPA chemical substance informationDodecylbenzenesulfonic acid (27176-87-0)


SAFETY INFORMATION

PropertyValue
Hazard symbolC
Hazard class codes34-22-10-67
Safety instructions26-36/37/39-45-16
UN number for transportUN 2924 3/PG 3
WGK Germany2
RTECS numberDB6600000
TSCATSCA listed
Hazard class8
Packing groupIII
HS code34021100
Storage category3 - Flammable liquid
Hazard classificationAcute toxicity, Category 4   (Oral)
Serious eye damage, Category 1
Flammable liquid, Category 3
Skin corrosion, Category 1B
Specific   target organ toxicity – single exposure, Category 3
Hazardous substances data27176-87-0 (Hazardous Substances Data)


PRODUCT USAGE

Dodecylbenzenesulfonic acid is a widely used anionic surfactant. In the detergent industry, it serves as a key raw material for producing household and industrial liquid detergents and laundry powders, offering excellent detergency, foaming, and emulsifying properties. In the textile and dyeing industry, it is used as a penetrating agent and degreaser, helping dyes penetrate evenly and removing grease from fabrics. Additionally, it acts as an auxiliary agent in pesticides, coatings, and polymerization reactions. Due to its strong acidity, it is also used in metal cleaning and industrial equipment rust removal.

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