Surfactants
REACH
Sodium p-toluenesulfonate
CAS Number
657-84-1
EC Number
211-522-5
What is Sodium p-toluenesulfonate?
Sodium p-toluenesulfonate (CAS 657-84-1), also known as sodium tosylate, is an aromatic sulfonate salt.
Where is Sodium p-toluenesulfonate used?
- Textile and leather processing: improves dye solubility and penetration for uniform color uptake
- Coatings and inks: hydrotrope that stabilizes pigment dispersions and prevents phase separation
- Personal care: adjusts viscosity and enhances solubility of active ingredients in cleansing and conditioning products
- Heavy-duty liquid detergents: increases solubility of organic compounds in water
- It serves as a precursor or co-catalyst in synthesis processes.
Commercial specifications
- Anhydrous and hydrate forms
- Technical and high-purity grades; reagent-grade material from select suppliers
- Packaging from 25 kg bags to bulk quantities
Other Names (Synonyms)
RefChem:1098831|Benzenesulfonic acid, 4-methyl-, sodium salt|P-Toluenesulfonic acid sodium salt hydrate|4-sulphotoluene sodium salt|sodium p-toluenesulfonic acid|CUYTYLVEYFUAAX-UHFFFAOYSA-N|Benzenesulfonic acid, 4-methyl-, sodium salt (1:1)
What are the physical properties of Sodium p-toluenesulfonate?
Melting Point >300°C
Boiling Point 400°C[at 101 325 Pa]
Density 1.55 g/cm3 (20℃)
Flash Point 500 °C
Appearance white powder
Color White to off-white
Form Powder
Water Solubility soluble
Vapor Pressure <1 hPa (20 °C)
Log P 0.07 at 20℃
How is Sodium p-toluenesulfonate classified and handled safely? Learn More
Danger
GHS06· Toxic GHS07· Irritant GHS08· Health Hazard GHS09· Environmental Hazard
Hazard Statements
H301 Toxic if swallowed
H312 Harmful in contact with skin
H317 May cause an allergic skin reaction
H319 Causes serious eye irritation
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
Which trade and regulatory codes apply to Sodium p-toluenesulfonate?
HS Code 29041000
WGK (Germany) 1