Sodium p-toluenesulfonate (CAS:657-84-1)

CAS Number

657-84-1

UN Number

Not regulated as dangerous goods

Molecular formula：

C₇H₇SO₃Na/   CH₃H₆SO₃Na

Structural Formula

Molecular mass

194.18

Physical appearance

White crystalline powder

Synonyms

Sodium 4-toluenesulfonate, Sodium   p-toluenesulfonate, Sodium toluene-4-sulfonate, Sodium salt

Physicochemical Properties：

Readily soluble in water;   soluble in methanol; slightly soluble in most organic solvents.

Storage Stability    

The product should be   stored in a cool, dry and well-ventilated place.
  During loading and unloading, avoid damaging the packaging bags; protect from   rain and moisture absorption.

Packaging

Double-layer packaging   consisting of an inner plastic film bag and an outer plastic woven bag. Bag   dimensions: 60 × 105 cm. Net weight: 25 kg per bag.

Signal Word 

Warning

Hazard Statements  

Causes serious eye   irritation

Precautionary   Statements

Wash exposed areas   thoroughly after handling.

Hazardous Class

Not regulated as   dangerous goods

Packing Group

Not regulated as   dangerous goods

• Used in the chemical industry        and in synthetic detergent production as a slurry conditioning agent and        as a solubilizer for synthetic laundry powder. In addition to enabling        the laundry powder to meet all required specifications, it provides the        following benefits:

• Reduces slurry        viscosity and improves slurry fluidity, facilitating the spray-drying        process, lowering energy consumption, and thereby increasing production        capacity.

• Increases the        moisture content of the finished laundry powder by 2–4%, reducing        production costs.

• Promotes the        hydration of sodium tripolyphosphate (STPP) in the powder, enhancing        anti-caking properties and improving product quality.

• Reduces the loss        of fine powder in the spray tower exhaust, decreasing pollution and        increasing output.

• Sodium p-toluenesulfonate is        also used in the organic synthesis industry. In the pharmaceutical        sector, it is employed in the synthesis of doxycycline, dipyridamole,        and naproxen, and serves as an intermediate in the production of        amoxicillin and cefadroxil.

• Use: Add 2–3% of this        product (by weight) to the detergent slurry formulation to achieve the       desired effect.

Active matte content   %  ≥

78

90

Moisture %    ≤

14

8

Inorganic salt %   ≤

8

2

PH（1%   solution）

7～8

7～8

Ethanol dissolution   test

ok

ok

Water dissolution test

ok

ok