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CHEMICAL IDENTIFICATION & NOMENCLATURE
IUPAC Name: Sodium 2-methylnaphthalene-1-sulfonate
Common Name: Purified isomer of sodium methylnaphthalenesulfonate
CAS Registry Number: 130-14-3 (specific for this isomer)
EC Number: 204-976-2
Synonyms:
2-Methyl-1-naphthalenesulfonic acid sodium salt,Sodium 2-methyl-1-naphthalenesulphonate,NSC 403690
Molecular Formula: C₁₁H₉NaO₃S
Molecular Weight: 244.24 g/mol
Chemical Structure: A single isomer: naphthalene with a methyl group at position 2 and a sulfonate group at position 1, neutralized with sodium.
2. KEY DIFFERENCES FROM COMMERCIAL MIXTURE (DOSSIER 2)
Aspect, Commercial Mixture (26264-58-4), Purified Isomer (130-14-3)
Composition, Isomeric mixture (1- & 2-methyl, various sulfonation positions), up to 30% Na₂SO₄, Predominantly the single 2-methyl-1-sulfonate isomer, higher purity (>95%)
Purity/Active, 75-85% active, 90-98% active (low inorganic salt)
Performance, Good general-purpose dispersant, More consistent and potentially superior performance in specific applications due to defined structure
Cost, Lower cost commodity chemical, Higher cost, specialty chemical
Applications, Broad industrial uses (concrete, agro), Research, pharmaceuticals, high-performance dispersants, analytical standards
3. SYNTHESIS & PURIFICATION
Starts with purified 2-methylnaphthalene feedstock.
Controlled sulfonation with concentrated H₂SO₄ at low temperature to maximize monosulfonation at the 1-position.
Selective crystallization or extraction processes to isolate the 1-sulfonic acid isomer from reaction byproducts.
Precise neutralization with NaOH and recrystallization from water/ethanol to obtain high-purity salt.
4. SPECIALIZED APPLICATIONS
Pharmaceutical Intermediate: Used in the synthesis of specific drugs (e.g., certain naphthalene-based compounds).
Analytical Chemistry: As a standard or reagent in chromatography and spectroscopy.
High-Performance Dispersants: Where consistent molecular structure is critical for reproducible performance in advanced materials (e.g., carbon nanotube dispersion, electronic ceramics).
Research: Studying structure-activity relationships of surfactants.
SAFETY INFORMATION ABOUT SODIUM 2-METHYLNAPHTHALENE-1-SULFONATE
First aid measures:
Description of first aid measures:
General advice:
Consult a physician.
Show this safety data sheet to the doctor in attendance.
Move out of dangerous area:
If inhaled:
If breathed in, move person into fresh air.
If not breathing, give artificial respiration.
Consult a physician.
In case of skin contact:
Take off contaminated clothing and shoes immediately.
Wash off with soap and plenty of water.
Consult a physician.
In case of eye contact:
Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.
Continue rinsing eyes during transport to hospital.
If swallowed:
Do NOT induce vomiting.
Never give anything by mouth to an unconscious person.
Rinse mouth with water.
Consult a physician.
Firefighting measures:
Extinguishing media:
Suitable extinguishing media:
Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
Special hazards arising from the substance or mixture
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas
Advice for firefighters:
Wear self-contained breathing apparatus for firefighting if necessary.
Accidental release measures:
Personal precautions, protective equipment and emergency procedures
Use personal protective equipment.
Avoid breathing vapours, mist or gas.
Evacuate personnel to safe areas.
Environmental precautions:
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Methods and materials for containment and cleaning up:
Soak up with inert absorbent material and dispose of as hazardous waste.
Keep in suitable, closed containers for disposal.
Handling and storage:
Precautions for safe handling:
Avoid inhalation of vapour or mist.
Conditions for safe storage, including any incompatibilities:
Keep container tightly closed in a dry and well-ventilated place.
Containers which are opened must be carefully resealed and kept upright to prevent leakage.
Storage class (TRGS 510): 8A: Combustible, corrosive hazardous materials
Exposure controls/personal protection:
Control parameters:
Components with workplace control parameters
Contains no substances with occupational exposure limit values.
Exposure controls:
Appropriate engineering controls:
Handle in accordance with good industrial hygiene and safety practice.
Wash hands before breaks and at the end of workday.
Personal protective equipment:
Eye/face protection:
Tightly fitting safety goggles.
Faceshield (8-inch minimum).
Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).
Skin protection:
Handle with gloves.
Gloves must be inspected prior to use.
Use proper glove
removal technique (without touching glove's outer surface) to avoid skin contact with this product.
Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices.
Wash and dry hands.
Full contact:
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
Splash contact
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
It should not be construed as offering an approval for any specific use scenario.
Body Protection:
Complete suit protecting against chemicals, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace.
Respiratory protection:
Where risk assessment shows air-purifying respirators are appropriate use a fullface respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls.
If the respirator is the sole means of protection, use a full-face supplied air respirator.
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).
Control of environmental exposure
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Stability and reactivity:
Chemical stability:
Stable under recommended storage conditions.
Incompatible materials:
Strong oxidizing agents:
Hazardous decomposition products:
Hazardous decomposition products formed under fire conditions.
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas.
Disposal considerations:
Waste treatment methods:
Product:
Offer surplus and non-recyclable solutions to a licensed disposal company.
Contact a licensed professional waste disposal service to dispose of this material.
Contaminated packaging:
Dispose of as unused product
