PRODUCTS

SODIUM METHYL NAPHTHALENE SULFONATE

Sodium methyl naphthalene sulfonate is used wetting agent in formulations where penetration and spreading of liquids on surfaces are needed.
Sodium methyl naphthalene sulfonate is used hydrotrope to improve solubility and stability of water-based systems, including industrial cleaning solutions, inks, agricultural formulations and coatings.
Sodium methyl naphthalene sulfonate is used emulsifier and solubilizer in specialized industrial products where stabilization of mixtures is critical.

CAS Number: 26264-58-4
Other(deleted CASRN): 127670-54-6
ECHA EINECS - REACH Pre-Reg: 247-564-6
Formula: C11H9NaO3S
Molecular Weight: 244.24509928 g/mol

SYNONYMS:
methylnaphthalenesulfonic acid, sodium salt, 1- naphthalenesulfonic acid, 2-methyl-, sodium salt (1:1), naphthalenesulfonic acid, methyl-, sodium salt, sodium 2-methylnaphthalene-1-sulfonate, sodium methyl naphthalene sulfonate, sodium methylnaphthalenesulphonate, sodium,2-methylnaphthalene-1-sulfonate, Sodium methylnaphthalenesulfonate, Sodium methane naphthalene sulfonate, Naphthalenesulfonic acid, methyl-, sodium salt, Sodium methylnaphthalenesulphonate, 2-methylnaphthalene-1-sulfonic acid sodium salt, Sodium 4-methyl-1-naphthalenesulfonate, 0T389YYK1U, Sodium 1-methylnaphthalene-4-sulfonate, UNII-0T389YYK1U, 1-Naphthalenesulfonic acid, 4-methyl-, sodium salt (1:1), 5258-48-0, SCHEMBL11192937, SCHEMBL30274447, Q27237221, Sodium methylnaphthalenesulfonate, Sodium methylnaphthalenesulphonate, Methylnaphthalenesulfonic acid, sodium salt, Naphthalenesulfonic acid, methyl-, sodium salt, EINECS 247-564-6, Naphthalenesulfonic acid, methyl-, sodium salt (1:1), RefChem:887693, Sodium methylnapthalenesulfonate, REDI PRO Glass and Counter Cleaner, Naphthalenesulfonic acid, methyl, sodium salt, Sodium mono-and dimethyl naphthalene sulfonate, 247-564-6, 977052-10-0, Sodium 2-methyl-1-naphthalenesulfonate, 26264-58-4, sodium,2-methylnaphthalene-1-sulfonate, 1A0PLS266R, 118218-23-8, 1-Naphthalenesulfonic acid, 2-methyl-, sodium salt (1:1), UNII-1A0PLS266R, SCHEMBL339169, SCHEMBL29446139, sodium methylnaphthalene sulfonate, DTXSID50904100, GCNLRNBDDUYJMP-UHFFFAOYSA-M, NS00084335, Q27252145, methylnaphthalenesulfonic acid, sodium salt, 1-naphthalenesulfonic acid, 2-methyl-, sodium salt (1:1), naphthalenesulfonic acid, methyl-, sodium salt, sodium 2-methylnaphthalene-1-sulfonate, sodium methyl naphthalene sulfonate, Sodium methylnaphthalenesulphonate, sodium;2-methylnaphthalene-1-sulfonate

Sodium methyl naphthalene sulfonate is an anionic organic salt derived from methylnaphthalene sulfonic acids.
Sodium methyl naphthalene sulfonate belongs to the broader class of alkylnaphthalene sulfonates, which are commonly used as dispersants, wetting agents, hydrotropes and surfactants in industrial formulations.

These compounds contain a hydrophobic naphthalene ring with a sulfonate (–SO₃⁻) group neutralized by a sodium ion.
The combination of a hydrophobic aromatic ring and a hydrophilic sulfonate group gives the molecule Sodium methyl naphthalene sulfonate's surface-active properties, making it useful in applications where reduction of surface or interfacial tension and dispersion of solids in liquids are needed.

Sodium methyl naphthalene sulfonate is typically encountered as a solid material, most commonly in the form of a fine powder, granules, or crystalline solid depending on the manufacturing process and moisture content.
Sodium methyl naphthalene sulfonate's color generally ranges from off-white to light brown, which may vary slightly due to production impurities or isomeric composition.

Sodium methyl naphthalene sulfonate is odorless or has only a faint aromatic odor.
Sodium methyl naphthalene sulfonate exhibits high solubility in water, forming clear to slightly opalescent solutions.
This strong water solubility arises from the presence of the sulfonate group, which imparts a permanent negative charge when dissolved.

Sodium methyl naphthalene sulfonate is only slightly soluble to practically insoluble in most non-polar organic solvents such as hexane or toluene, but it may show limited solubility in polar organic solvents like methanol or ethanol.
Sodium methyl naphthalene sulfonate is non-volatile and does not possess a measurable vapor pressure under normal ambient conditions.

As an ionic salt, Sodium methyl naphthalene sulfonate does not have a true boiling point; instead, it decomposes at elevated temperatures before vaporization can occur.
Specific melting point data are not consistently reported in public databases, but like many aromatic sulfonate salts, Sodium methyl naphthalene sulfonate shows thermal stability at normal processing temperatures and gradually decomposes when subjected to strong heating.

Sodium methyl naphthalene sulfonate is chemically stable under standard storage and handling conditions.
Sodium methyl naphthalene sulfonate is resistant to hydrolysis in neutral and alkaline aqueous environments and maintains its chemical integrity across a broad pH range.

In acidic conditions, Sodium methyl naphthalene sulfonate remains stable as long as extreme acidity and elevated temperatures are avoided.
Sodium methyl naphthalene sulfonate does not readily undergo oxidation or reduction under normal industrial use conditions.
In aqueous solution, Sodium methyl naphthalene sulfonate behaves as an anionic surfactant and hydrotrope, significantly reducing surface and interfacial tension and improving the solubility of hydrophobic substances.

Sodium methyl naphthalene sulfonate does not strongly foam, which differentiates it from many aliphatic surfactants.
Sodium methyl naphthalene sulfonate's surface activity is driven by the hydrophobic naphthalene ring and the hydrophilic sulfonate group, enabling effective adsorption at solid–liquid and liquid–liquid interfaces.

Sodium methyl naphthalene sulfonate is generally non-flammable and does not contribute to combustion.
Sodium methyl naphthalene sulfonate does not exhibit explosive or self-reactive properties.
Under fire conditions, thermal decomposition may generate sulfur oxides, carbon oxides, and aromatic compounds.

The density and bulk density of Sodium methyl naphthalene sulfonate depend on particle size and formulation and therefore vary between suppliers.
In solution, Sodium methyl naphthalene sulfonate increases the conductivity of water due to its ionic nature.
Sodium methyl naphthalene sulfonate does not show optical activity and has no measurable flash point.

Overall, the physical and chemical properties of Sodium methyl naphthalene sulfonate reflect its role as a stable, water-soluble aromatic sulfonate, optimized for dispersing, wetting, and hydrotropic functions in industrial and technical applications rather than for volatility or reactivity.

In terms of environmental behavior, aromatic sulfonates such as Sodium methyl naphthalene sulfonate are typically water-mobile due to their ionic nature.
They are not volatile and therefore do not present inhalation risks as vapors.

Biodegradability depends on the specific molecular structure; aromatic sulfonates tend to degrade more slowly than linear aliphatic surfactants, but they are generally considered low bioaccumulation substances because of their high water solubility and ionic charge.
Environmental release is mainly associated with industrial wastewater, where treatment processes play a key role in removal.

From a regulatory perspective, Sodium methyl naphthalene sulfonate is generally treated as an industrial chemical rather than a consumer ingredient.
Under European chemical frameworks such as REACH, it is typically registered as a substance or as part of a category of naphthalene sulfonates, with safety data supplied by manufacturers.

Overall, Sodium methyl naphthalene sulfonate is best described as a functional specialty surfactant, optimized for dispersion, wetting, and hydrotropic effects rather than cleaning or foaming.
Sodium methyl naphthalene sulfonate's importance lies not in consumer visibility, but in its behind-the-scenes role in ensuring consistency, performance, and stability across a wide range of industrial and technical formulations.

USES and APPLICATIONS of SODIUM METHYLNAPHTHALENESULFONATE:
Sodium methyl naphthalene sulfonate and related alkyl naphthalene sulfonates have a wide range of technical and industrial uses.
Sodium methyl naphthalene sulfonate is used dispersant in pigments, dyes, cement, concrete and ceramic slurries to help particles remain uniformly suspended and prevent agglomeration.

Sodium methyl naphthalene sulfonate is additive in construction for improving flowability, workability, and water reduction in concrete and mortar.
Sodium methyl naphthalene sulfonate is used emulsifier and solubilizer in specialized industrial products where stabilization of mixtures is critical.

These functional properties result from Sodium methyl naphthalene sulfonate's ability to reduce surface tension and interact with both hydrophobic and hydrophilic components in mixtures.
Sodium methyl naphthalene sulfonate shows good electrolyte tolerance, meaning its performance is not significantly reduced in the presence of salts or hard water ions.

This property makes Sodium methyl naphthalene sulfonate suitable for use in cementitious systems, pigment dispersions, and industrial formulations where ionic strength is high.
In practical use, Sodium methyl naphthalene sulfonate is often selected when formulators need dispersion efficiency, formulation stability, and cost effectiveness, rather than high detergency.

Sodium methyl naphthalene sulfonate's relatively low odor, good storage stability, and resistance to hydrolysis make it suitable for long shelf-life products.
Sodium methyl naphthalene sulfonate is also used as an intermediate or auxiliary agent in some chemical processes where controlled solubilization is required.

From a chemical behavior perspective, Sodium methyl naphthalene sulfonate does not act primarily as a foaming surfactant like alkyl sulfates, but rather as a hydrotrope and dispersant.
Hydrotropes increase the apparent solubility of poorly water-soluble substances without forming classical micelles.

This makes Sodium methyl naphthalene sulfonate especially useful in formulations where clarity, stability, or controlled dispersion is required rather than foam generation.
Sodium methyl naphthalene sulfonate's aromatic structure also provides good thermal stability compared to many aliphatic surfactants.

In industrial formulation science, Sodium methyl naphthalene sulfonate is valued for its ability to reduce interparticle attraction between solids suspended in liquids.
When adsorbed onto pigment, filler, or cement particles, the sulfonate groups create electrostatic repulsion, preventing agglomeration and sedimentation.

This mechanism is particularly important in cement admixtures, construction chemicals, ceramic slurries, and pigment pastes, where uniform particle distribution directly affects performance and final product quality.
From a manufacturing standpoint, Sodium methyl naphthalene sulfonate is typically produced by sulfonation of methylnaphthalene using sulfonating agents such as sulfuric acid or sulfur trioxide, followed by neutralization with sodium hydroxide or sodium carbonate.

Commercial products may not always be a single pure isomer; instead, they may consist of isomeric mixtures depending on the sulfonation position on the naphthalene ring.
This is common in industrial sulfonates and generally does not reduce functional performance.

Regarding compatibility, Sodium methyl naphthalene sulfonate shows good tolerance toward hard water, electrolytes, and alkaline environments, which is why it is frequently used in construction and industrial cleaning formulations.

Sodium methyl naphthalene sulfonate is generally incompatible with strong cationic surfactants, as ionic pairing can lead to precipitation or loss of performance.
In mixed systems, Sodium methyl naphthalene sulfonate is most compatible with other anionic and nonionic surfactants.

CHARACTERISTICS AND BENEFITS of SODIUM METHYLNAPHTHALENESULFONATE:
Sodium methyl naphthalene sulfonate’s primary benefit is its effectiveness as a dispersant and wetting agent without extensive foaming, which is desirable in many industrial processes where foaming is detrimental.
Sodium methyl naphthalene sulfonate improves the efficiency of solid–liquid suspensions, enhances the uniformity of formulated products, and can contribute to improved processing performance in construction materials, ceramics, pigments, agrochemicals and cleaning products.
Sodium methyl naphthalene sulfonate also typically exhibits good tolerance to hard water and electrolytes, meaning its dispersing and wetting performance is less affected by dissolved salts than some other surfactants.

CHEMICAL PROPERTIES of SODIUM METHYLNAPHTHALENESULFONATE:
Chemically, Sodium methyl naphthalene sulfonate behaves as an anionic surfactant (sulfonate type) and a hydrotrope.
In solution, Sodium methyl naphthalene sulfonate's sulfonate group dissociates to provide a negatively charged functional group that can adsorb onto particles or interfaces.

This enables Sodium methyl naphthalene sulfonate to reduce surface or interfacial tension, improve wetting of solids by liquids, and keep fine particles dispersed by electrostatic repulsion.
Sodium methyl naphthalene sulfonate does not tend to form micelles like some other surfactants, instead functioning mainly by enhancing solubility of hydrophobic substances and stabilizing dispersions.

Sodium methyl naphthalene sulfonate is generally stable under normal conditions, showing resistance to breakdown in neutral or moderately alkaline solutions.
Extreme pH and oxidizing or reducing environments can affect structural integrity as with other aromatic sulfonates.

PHYSICAL PROPERTIES of SODIUM METHYLNAPHTHALENESULFONATE:
Sodium methyl naphthalene sulfonate is typically a solid at room temperature and is most often supplied as a powder or granular particulate.
Sodium methyl naphthalene sulfonate's exact appearance can vary from off-white to light beige depending on purity and manufacturing process.

Sodium methyl naphthalene sulfonate is soluble in water, forming clear aqueous solutions; high solubility is characteristic of sodium sulfonate salts due to their strong ionic character.
Sodium methyl naphthalene sulfonate is generally non-volatile, and no measurable vapor pressure is observed under ambient conditions.

As an ionic organic salt, Sodium methyl naphthalene sulfonate decomposes on strong heating rather than boiling.
Specific melting point and density values are not widely published for Sodium methyl naphthalene sulfonate in open sources, but similar naphthalene sulfonate salts are thermally stable solids with good water solubility.

IDENTIFIERS of SODIUM METHYLNAPHTHALENESULFONATE:
The principal identified form of Sodium methyl naphthalene sulfonate corresponds to CAS Number: 859071-38-8 and PubChem CID: 23669609.
The molecular formula of Sodium methyl naphthalene sulfonate is C₁₁H₉NaO₃S and the molecular weight is approximately 244.24 g/mol.
Sodium methyl naphthalene sulfonate is the sodium salt of 2-methylnaphthalene-1-sulfonic acid.

PROPERTIES of SODIUM METHYLNAPHTHALENESULFONATE:
*Appearance:
Sodium methyl naphthalene sulfonate is solid (reported as powder or crystalline)

*Solubility:
Sodium methyl naphthalene sulfonate is soluble in water (good aqueous solubility)

*Stability:
Sodium methyl naphthalene sulfonate is stable under normal conditions

*Chemical class:
Anionic surfactant / sulfonate (aryl sulfonate type)

*Behavior:
Sodium methyl naphthalene sulfonate functions as a hydrotrope and surfactant (reduces surface tension, enhances solubility of other substances in water)

STORAGE & HANDLING BEST PRACTICES of SODIUM METHYLNAPHTHALENESULFONATE:
Store Sodium methyl naphthalene sulfonate in a cool, dry place away from incompatible strong oxidizers.
Keep Sodium methyl naphthalene sulfonate containers tightly closed to prevent moisture uptake (many sulfonates are hygroscopic as powders).

CHARACTERISTICS & BENEFITS of SODIUM METHYLNAPHTHALENESULFONATE:
*Effective surfactant/dispersant:
Sodium methyl naphthalene sulfonate helps distribute solids in liquid systems and stabilize formulations.

*Water-soluble:
Sodium methyl naphthalene sulfonate nables compatibility with aqueous systems.

*Functional versatility:
Sodium methyl naphthalene sulfonate is used across coatings, ceramics, adhesives and construction chemicals.

CONNECTIONS WITH RELATED CHEMICALS of SODIUM METHYLNAPHTHALENESULFONATE:
Sodium methyl naphthalene sulfonate belongs to the broader family of alkyl-substituted naphthalene sulfonates, which are aromatic sulfonic acid salts known for their strong surface-active and hydrotropic behavior.
Structurally, Sodium methyl naphthalene sulfonate consists of a naphthalene ring system substituted with a methyl group and a sulfonate group, neutralized by sodium.

Sodium methyl naphthalene sulfonate nucleus provides hydrophobic character, while the sulfonate group introduces high polarity and ionic character.
This dual nature explains Sodium methyl naphthalene sulfonate's effectiveness at the interface between water and hydrophobic materials.

PHYSICAL and CHEMICAL PROPERTIES of SODIUM METHYL NAPHTHALENE SULFONATE:
Assay: 95.00 to 100.00
Food Chemicals Codex Listed: No
Flash Point: 32.00 °F. TCC (0.00 °C.) (est)
logP (o/w): 2.161 (est)
Soluble in: water, 2.851e+005 mg/L @ 25 °C (est)
CAS Number: 26264-58-4
Other(deleted CASRN): 127670-54-6
ECHA EINECS - REACH Pre-Reg: 247-564-6
Molecular Weight: 244.24509928
Formula: C11 H9 Na O3 S
Molecular Weight: 244.24 g/mol

Hydrogen Bond Donor Count: 0
Hydrogen Bond Acceptor Count: 3
Rotatable Bond Count: 1
Exact Mass: 244.01700960 Da
Monoisotopic Mass: 244.01700960 Da
Topological Polar Surface Area: 65.6 Å²
Heavy Atom Count: 16
Formal Charge: 0
Complexity: 323

Isotope Atom Count: 0
Defined Atom Stereocenter Count: 0
Undefined Atom Stereocenter Count: 0
Defined Bond Stereocenter Count: 0
Undefined Bond Stereocenter Count: 0
Covalently-Bonded Unit Count: 2
Compound Is Canonicalized: Yes
Name: Sodium Methylnaphthalenesulfonate

CAS Number: 26264-58-4
EC / EINECS Number: 247-564-6
PubChem CID: 23669609
Molecular Formula: C₁₁H₉NaO₃S
Molecular Weight: ~244.24 g/mol
Appearance: Solid (reported as powder or crystalline)
Solubility: Soluble in water (good aqueous solubility)
Stability: Stable under normal conditions
Chemical class: Anionic surfactant / sulfonate (aryl sulfonate type)
Behavior: Functions as a hydrotrope and surfactant (reduces surface tension, enhances solubility of other substances in water)

FIRST AID MEASURES of SODIUM METHYL NAPHTHALENE SULFONATE:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation:
Fresh air.
*In case of skin contact:
Take off immediately all contaminated clothing.
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact:
Rinse out with plenty of water.
Call in ophthalmologist.
Remove contact lenses.
*If swallowed:
After swallowing:
Immediately make victim drink water (two glasses at most).
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of SODIUM METHYL NAPHTHALENE SULFONATE:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains.
Collect, bind, and pump off spills.
Observe possible material restrictions.
Take up dry.
Dispose of properly.
Clean up affected area.

FIRE FIGHTING MEASURES of SODIUM METHYL NAPHTHALENE SULFONATE:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2)
Foam
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of SODIUM METHYL NAPHTHALENE SULFONATE:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection.
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of SODIUM METHYL NAPHTHALENE SULFONATE:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed.
Dry.

STABILITY and REACTIVITY of SODIUM METHYL NAPHTHALENE SULFONATE:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available