Material Safety Data Sheet: Sodium Dodecyl Benzene Sulfonate

Identification

Product Name: Sodium Dodecyl Benzene Sulfonate
Synonyms: LAS, Linear Alkylbenzene Sulfonate, Sodium Alkylbenzene Sulfonate
Chemical Formula: C18H29NaO3S
CAS Number: 25155-30-0
Molecular Weight: 348.48 g/mol
Recommended Use: Detergents, cleaning agents, industrial surfactant
Manufacturer Contact: Emergency contact phone and address details go directly on your package to meet regulations

GHS Classification: Eye Irritation, Category 2; Skin Irritation, Category 2; Acute Aquatic Toxicity, Category 2
Label Elements: Signal word “Warning”; exclamation mark hazard pictogram
Hazard Statements: Causes skin and serious eye irritation; toxic to aquatic life
Precautionary Statements: Avoid breathing mist, wash hands thoroughly after handling, keep out of reach of children, avoid release to the environment

Chemical Identity: Sodium Dodecyl Benzene Sulfonate
Common Name: LAS
Concentration: Usually 60–95% in commercial blends, with water and trace impurities
Additional Components: Water, sodium sulfate, minor organic impurities

Inhalation: Remove to fresh air, keep person at rest, seek medical attention if breathing remains difficult
Skin Contact: Remove contaminated clothing, rinse skin with plenty of water and soap, get medical help if severe irritation develops
Eye Contact: Rinse cautiously with water for at least 15 minutes holding eyelids open, remove contact lenses if present and easy, continue rinsing, seek medical attention
Ingestion: Do not induce vomiting, rinse mouth with water, give water to drink, get medical advice if you feel unwell
Most Important Symptoms: Burning or stinging in eyes, redness, itchiness, skin dryness or cracking, mouth or throat irritation

Suitable Extinguishing Media: Water spray, dry powder, foam, carbon dioxide
Unsuitable Extinguishing Media: High-pressure water jets
Specific Hazards: Product can produce toxic gases including sulfur oxides and carbon oxides in a fire
Protective Equipment: Full-face respirator with suitable filter, full protective clothing
Advice for Firefighters: Contain fire water to prevent runoff to drains or watercourses, use self-contained breathing apparatus

Personal Precautions: Use appropriate personal protective equipment, avoid direct contact, ventilate spill area
Environmental Precautions: Prevent entry into sewers, waterways, soil, or confined areas, notify environmental authorities if spill occurs
Methods for Cleaning Up: Absorb small spills with inert material and collect in containers for proper disposal, use non-sparking tools for collection, decontaminate area with soap and water

Handling: Use only in well-ventilated areas, keep container tightly closed and upright, avoid splashing and aerosols, wash thoroughly after handling
Storage Conditions: Store in original container in a cool, dry place sheltered from direct sunlight, keep away from strong acids, oxidizers, or foodstuffs
Specific End Uses: Industrial and professional cleaning and surfactant formulations only; do not use in household products in amounts exceeding recommended concentrations

Control Parameters: No occupational exposure limits set for this compound in most regulations; monitor for dusts and mists
Engineering Controls: Mechanical ventilation, eye wash stations, local exhaust
Personal Protective Equipment (PPE): Gloves (nitrile or neoprene), safety goggles, respirator for mists, protective clothing in bulk handling
Hygiene Measures: Wash hands before breaks, after work, and at end of shifts; handle in accordance with good industrial hygiene and safety practice

Reactivity: Reacts with strong oxidizers such as hydrogen peroxide, nitric acid
Chemical Stability: Stable under normal storage and handling conditions
Hazardous Reactions: May generate toxic gases when mixed with strong acids or bases
Conditions to Avoid: Heat, flames, incompatible chemicals
Incompatible Materials: Strong acids, strong oxidants
Decomposition Products: Emits sulfur oxides, carbon oxides when burned or decomposed

Likely Routes of Exposure: Inhalation, skin and eye contact, ingestion
Acute Toxicity: Oral LD50 rat: 2,000–4,000 mg/kg; skin contact produces moderate irritation
Chronic Effects: Prolonged or repeated exposure can defat or dry the skin, produce allergic reactions in sensitive individuals
Serious Eye Damage: Causes significant eye irritation, possible corneal damage without prompt flushing
Sensitization: Not known to cause skin sensitization in humans at normal use concentrations
Mutagenicity / Carcinogenicity: Not classified as mutagenic or carcinogenic by regulatory agencies

Ecotoxicity: Highly toxic to aquatic organisms including fish and invertebrates; LC50 (96hr, fish): 1–10 mg/l
Persistence and Degradability: Readily biodegradable under aerobic conditions; significant removal in wastewater treatment
Bioaccumulation Potential: Potential for bioaccumulation in aquatic species is low due to rapid degradation
Mobility in Soil: Moderately mobile in soils; can leach to groundwater if released in large quantities

Waste Treatment Methods: Dispose through licensed chemical waste contractor, avoid discharge to surface waters or drains
Contaminated Packaging: Rinse thoroughly; dispose as hazardous waste if not completely cleaned
Special Precautions: Do not mix with household waste; comply with local, regional, and national regulations for hazardous substance disposal

UN Number: 2586 for Sodium Alkylbenzene Sulfonates, if applicable
UN Proper Shipping Name: Alkylbenzenesulfonic acids, liquid, with not less than 5 percent but not more than 90 percent acid, or relevant sodium salt
Transport Hazard Class: 8 (Corrosive), 9 (Miscellaneous, if applicable)
Packing Group: III (if classified as dangerous goods)
Environmental Hazards: Marine pollutant; special labeling and containment for transport over water
Transport in bulk: Check relevant IMDG, ADR, or IATA rules as appropriate

Labelling: In accordance with Regulation (EC) No. 1272/2008 (CLP), GHS and OSHA HCS
Inventory Status: Listed on TSCA, EINECS, DSL, AICS, ENCS, IECSC according to national requirements
Restrictions: Use restrictions apply for cosmetic or food contact products
Other Regulations: Complies with REACH Annex XVII for surfactants, SARA Title III reporting not required; maintain availability of safety documentation according to local and national workplace safety acts
Worker Protection: Training for appropriate handling, PPE use, first aid and emergency procedures required for staff and contractors