Product Name: Sodium Fatty Acid Methyl Ester Sulfonate MES
Chemical Family: Anionic surfactant
CAS Number: 93348-22-2
Synonyms: Sodium methyl ester sulfonate, MES surfactant
Recommended Uses: Laundry detergents, cleaning agents, personal care products
Manufacturer Information: Contact details of supplier, address, emergency phone numbers
Classification: Eye irritation, Category 2; Skin irritation, Category 2
Signal Word: Warning
Hazard Statements: Causes serious eye irritation, may cause skin irritation
Pictograms: Exclamation mark
Precautionary Statements: Avoid direct skin and eye contact, use proper personal protective equipment, wash hands thoroughly after handling, seek medical advice if irritation occurs
Potential Health Effects: Eye redness, discomfort on skin, may aggravate pre-existing skin conditions
Chemical Name: Sodium Fatty Acid Methyl Ester Sulfonate
Common Components: Alkyl chain C12-C18, sodium ions, water
Formula: CnH2n-1SO3Na
Concentration: Usually 70-80% active ingredient, remaining water and minor impurities
Impurities: Trace unreacted fatty acids, methanol residue under 0.5%, inorganic salts less than 1%
Eye Contact: Rinse with plenty of water for fifteen minutes, lift eyelids occasionally, seek medical attention if discomfort persists
Skin Contact: Remove contaminated clothing, wash thoroughly with soap and water, get medical help for significant irritation
Inhalation: Move outside into fresh air, keep exposed person warm and at rest, get medical advice if symptoms develop
Ingestion: Rinse mouth with water, avoid inducing vomiting, contact poison control or seek medical attention promptly
Notes for Medical Practitioners: Treat symptomatically, monitor for allergic reactions or persistent irritation
Suitable Extinguishing Media: Water spray, dry chemical, foam, carbon dioxide
Specific Hazards: May produce toxic fumes (sulfur oxides, carbon monoxide, sodium oxides) in fire
Protective Equipment: Firefighters should use self-contained breathing apparatus and full protective gear
Special Procedures: Cool containers with water if exposed to heat, ensure adequate ventilation, avoid runoff into sewers
Unusual Fire Hazards: Heated containers may rupture, avoid inhaling combustion products
Personal Precautions: Wear gloves, goggles, protective clothing to prevent skin and eye contact
Environmental Precautions: Prevent spills from entering drains, surface waters, or soil
Methods for Clean-Up: Contain spilled material, absorb with inert material (sand, earth), collect for approved disposal, wash spill area with water, ventilate space
Reporting: Notify proper local authorities as required by regulation for large spills
Safe Handling: Use only in well-ventilated areas, avoid contact with skin and eyes, do not eat, drink, or smoke during use
Storage Conditions: Store in a tightly sealed container, in a cool, dry place away from strong acids, oxidizers, and moisture
Incompatibilities: Avoid contact with strong oxidizing agents, acids, ammonium salts
Other Precautions: Keep out of reach of children and unauthorized personnel, clearly label all containers, avoid freezing or excessive heat
Occupational Exposure Limits: Not established for sodium MES; general dust/mist limits can apply
Engineering Controls: Provide adequate ventilation, use local exhaust where dust or mist forms
Personal Protective Equipment: Wear chemical-resistant gloves (nitrile or neoprene), safety goggles, long sleeves, protective footwear
Respiratory Protection: Use approved respirators during spraying or high-dust situations
Hygiene Measures: Wash hands and exposed areas before eating, after handling product, remove and wash contaminated clothing
Appearance: White or off-white powder or granules
Odor: Faint, characteristic fatty
pH (1% solution): 7-9
Melting Point: 185-190°C
Boiling Point: Decomposes without boiling
Solubility: Freely soluble in water, forms stable foaming solutions
Flash Point: Not flammable
Density: About 0.5-0.7 g/cm³
Vapor Pressure: Not applicable
Viscosity: Not applicable
Other Properties: Stable to moderate heat, forms dust, hygroscopic in open air
Chemical Stability: Stable under recommended storage conditions
Conditions to Avoid: Excessive heat, moisture, open flames, strong acids
Materials to Avoid: Strong oxidizing agents, strong acids, reducing agents
Hazardous Decomposition: Emits sulfur oxides, carbon monoxide, sodium oxides on decomposition
Polymerization: Does not occur under normal conditions
Acute Toxicity: Low acute toxicity based on animal studies (oral LD50 > 2,000 mg/kg, rat)
Skin Irritation: Mild skin irritant in rabbits
Eye Irritation: Causes eye irritation, possible transient redness and tearing
Inhalation: Dust may irritate lungs, throat if inhaled excessively
Chronic Exposure: No evidence of long-term effects in typical workplace exposure
Carcinogenicity, Mutagenicity: Not listed as carcinogen or mutagen by IARC, NTP, OSHA
Sensitization: Rare, but contact may sensitize susceptible individuals
Aquatic Toxicity: Harmful to aquatic organisms at high concentrations (EC50 for fish: 14-30 mg/L, 96h)
Persistence and Degradability: Readily biodegradable (>80% in 28 days, OECD 301 test)
Bioaccumulation: Low bioaccumulation potential
Mobility in Soil: Mobile in water, can move through soil, but rapidly degrades
Other Adverse Effects: No known significant effects other than aquatic toxicity at undiluted concentrations
Waste Treatment Methods: Dispose of according to national and local regulations
Recommended Disposal: Can be processed in suitable incineration plant or controlled landfill, avoid discharge to environment
Container Disposal: Empty containers can be rinsed and recycled or disposed of with non-hazardous waste, do not reuse for other chemicals
UN Number: Not classified as a dangerous good
Transport Hazard Class: Not regulated
Packing Group: Not assigned
Special Precautions: Prevent container damage, keep sealed during transport, avoid water entry or mixing with acids in transit
Shipping Description: Anionic surfactant, solid, not hazardous for land, sea, or air shipment
TSCA Status: Listed on U.S. Toxic Substances Control Act Inventory
OSHA Status: Not hazardous under OSHA Hazard Communication Standard
REACH Registration: Registered as a substance under the European Union’s REACH regulation
DSL/NDSL (Canada): Listed
Inventory Status: Included in Australia, China, Japan, Korea, Philippines inventories
Label Warnings: Irritant symbol required under GHS/CLP
Restrictions: No major global restrictions, check for specific regional rules on surfactants in household, personal care, environmental release
