| CAS NO. |
27176-87-0 |
|
| EINECS NO. |
248-289-4 |
| FORMULA |
CH3(CH2)11C6H4SO3H |
| MOL
WT. |
326.49 |
|
H.S.
CODE
|
3402.11 |
|
TOXICITY
|
Oral rat LD50: 650 mg/kg |
| SYNONYMS |
Dodecylbenzene
Sulfonic Acid (Strait Chain); LAS; LABSA; |
| Laurylbenzenesulfonic Acid;
Laurylbenzenesulfonate; n-Dodecylbenzene
Sulfonic Acid; Alkylbenzene sulphonate, sodium
salt; Linear Alkylbenzene Sulphonic Acid; Dodecylbenzolsulfonsäure (German); ácido dodecilbenceno
sulfónico
(Spanish); Acide dodécylbenzènesulfonique (French); |
|
CLASSIFICATION
|
Anionic Surfactant
|
|
DESCRIPTION
OF LAS
|
|
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. |
|
PHYSICAL AND CHEMICAL PROPERTIES
|
| PHYSICAL
STATE |
brown
liquid
|
| MELTING POINT |
10
C |
| BOILING
POINT |
315
C |
| SPECIFIC GRAVITY |
1.2
|
| SOLUBILITY
IN WATER |
partially soluble
|
| pH |
|
| VAPOR PRESSURE |
|
|
REFRACTIVE
INDEX
|
|
|
NFPA
RATINGS
|
Health: 2
; Flammability: 0; Reactivity : 0
|
|
AUTOIGNITION
|
|
| FLASH
POINT |
149
C
|
| STABILITY |
Stable under
ordinary conditions |
|
APPLICATIONS
|
|
Household
detergents including laundry powders, laundry
liquids, dishwashing liquids and other household
cleaners. Industrial applications of wetting
agent, emulsifier for agricultural herbicides
and in polymerization.
|
| SALES
SPECIFICATION |
|
APPEARANCE
|
Brown
liquid |
|
ACTIVE
MATTER
|
96.0%
min
|
|
ACID
VALUE
|
180
- 190
|
|
FREE
OIL |
1.5%
max
|
|
WATER |
1.0%
max
|
|
COLOR,
KLETTE
|
70
max (5%
Sol. pH=7, 40mm cell)
|
|
FREE
SULFURIC ACID
|
1.5%
max
|
| TRANSPORTATION |
| PACKING |
210
kgs in drum |
| HAZARD CLASS |
8
(Packing group: III) |
| UN
NO. |
2586
|
| LAS HOMOLOGUES
AND SALTS |
|
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 |
|
|
|
PRICE
INFORMATION |
|
|