SODIUM LAURYLBENZENESULFONATE

PRODUCT IDENTIFICATION
CAS NO. 25155-30-0

SODIUM LAURYLBENZENESULFONATE
EINECS NO. 246-680-4
FORMULA CH3(CH2)11.C6H4SO3Na
MOL WT. 348.52

H.S. CODE

  

TOXICITY

  
SYNONYMS Sodium Dodecyl benzenesulfonate; LABSA Sosium salt;
Sodium dodecylphenylsulfonate; Dodecyl benzenesulfonic acid, Sodium salt; Natriumdodecylbenzolsulfonat; Dodecilbencenosulfonato de sodio; Dodécylbenzènesulfonate de sodium; Sodium Linear Alkylbenzene solfonate;
SMILES

 

CLASSIFICATION

SURFACTANTS /

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE yellow solid in various forms
MELTING POINT

> 300 C
BOILING POINT  
SPECIFIC GRAVITY

 
SOLUBILITY IN WATER Good
pH  
VAPOR PRESSURE  

REFRACTIVE INDEX

 

NFPA RATINGS

 Health: 2 ; Flammability: 0; Reactivity : 0

AUTOIGNITION

 
FLASH POINT

 
STABILITY Stable at normal conditions.

APPLICATIONS
Linear alkylbenzene sulfonic acid is the largest-volume synthetic surfactant because of its relatively low cost, good performance, the fact that it can be dried to a stable powder and the biodegradable environmental friendliness as it has straight chain. LAS is an anionic surfactants with molecules characterized by a hydrophobic and a hydrophilic group. Alpha-olefin sulfonates (AOS) alkyl sulfates (AS) are also examples of commercial anionic surfactants. They are nonvolatile compounds produced by sulfonation. LAS are complex mixtures of homologues of different alkyl chain lengths (C10 to C13 or C14) and phenyl positional isomers of  2 to 5-phenyl in proportions dictated by the starting materials and reaction conditions, each containing an aromatic ring sulfonated at the para position and attached to a linear alkyl chain at any position with the exception of terminal one (1-phenyl). The properties of LAS differ in physical and chemical properties according to the alkyl chain length, resulting in formulations for various applications. The starting material LAB (linear alkylbenzene) is produced by the alkylation of benzene with n-paraffins in the presence of hydrogen fluoride (HF) or aluminium chloride (AlCl3) as a catalyst.  LAS is produced by the sulfonation of LAB with oleum in batch reactors. Other sulfonation alternative reagents are sulfuric acid, diluted sulfur trioxide, chlorosulfonic acid and sulfamic acid on falling film reactors. LAS are then neutralized to the desired salt (sodium, ammonium, calcium, potassium, and triethanolamine salts). Surfactants are widely used in the industry needed to improve contact between polar and non-polar media such as between oil and water or between water and minerals. Linear alkylbenzene sulfonic acid is mainly used to produce household detergents including laundry powders, laundry liquids, dishwashing liquids and other household cleaners as well as in numerous industrial applications like as a coupling agent and as an emulsifier for agricultural herbicides and in emulsion polymerization.

PARENT SULFONIC ACID

SALTS

CHAIN LENGTH

CAS RN

CAS RN
Dodecylbenzene sulfonic acid 1322-98-1 1322-98-1 (Sodium)
Undecylbenzene sulfonic acid 50854-94-9 27636-75-5 (Sodium)
61931-75-7 (Ammonium)
Linear Alkylbenzene sulfonic acid 27176-87-0 25155-30-0 (Sodium)
29756-98-7 (Aluminium)
1331-61-9 (Ammonium)
26264-06-2 (Calcium)
27177-77-1 (Potassium)
Tridecylbenzene sulfonic acid 25496-01-9 26248-24-8 (Sodium)
Tetradecylbenzene sulfonic acid 30776-59-1 28348-61-0 (Sodium)
Pentadecylbenzene sulfonic acid 61215-89-2 64716-02-5 (Potassium)
Hexadecylbenzene sulfonic acid 16722-32-0 64716-00-3 (Potassium)
Heptadecylbenzene sulfonic acid 39735-13-2

 

SALES SPECIFICATION

60% GRADE

APPEARANCE

 Light yellow paste

ACTIVE MATTER

60 ± 1% min
FREE OIL

1.5% max
SULFONIC ACID

0.4% max

COLOR, KLETT

50 max
pH

8 - 11

20% GRADE

APPEARANCE

 yellowish liquid

ACTIVE MATTER

20 ± 1% min
FREE OIL

1.5% max
SULFONIC ACID

0.4% max

COLOR, KLETT

50 max
pH

8 - 11
TRANSPORTATION
PACKING 200kgs in drum
HAZARD CLASS

 
UN NO.

 

GENERAL DESCRIPTION OF IONIC SURFACTANTS

Ionic surfactants which contain hydrophobic hydrocarbon group connected with one or several hydrophilic groups dissociate into a positively charged cation and a negatively charged anion in an aqueous solution. If the head is negatively charged to carry the surface active properties, it is called anionic surfactant, whereas a positively charged head is the carrier of the surface active properties in cationic surfactants. Typically cationic surfactants are based on the nitrogen atom carrying the cationic charge such as amine and quaternary ammonium product.

Cationic surfactant is considered to be poor cleaners but it contributes to the fabric softening, the disinfecting properties, and the grease-water interfacial tension reducing. Cationic surfactants include quaternary ammonium compounds, amines (primary, secondary, tertiary, diamines, polyamines, amine salts), imidazoline compounds, betaine compounds, and esterquats.

Anionic surfactant is the widely used type of surface active agent for laundry detergents, liquid cleaners and shampoos due to excellent cleaning properties particularly effective at oily soil cleaning and oil/clay soil suspension. Anionic surfactants are deactivated in many hard water. To prevent deactivation, builders should be dosed. Anionic surfactant is used as a emulsifier in cosmetics, tooth paste, cream, shampoo, and acrylic binder. Common soap is an anionic surfactant. Carboxylate, sulfate, sulfonate and phosphate are the polar groups in anionic surfactants. Anionic surfactants include alkyl benzene sulfonate, fatty acid salts, sodium lauryl sulfate, alkyl sulfate salts, sodium lauryl ether sulfate, alpha-olefin sulfonates, phosphate esters, sulphosuccinates, alkyl phenol ether sulfates, and isethionates.