Product Name: Lignosulfonic Acid
Synonyms: Sulfonated lignin, Lignin sulfonic acid
Chemical Formula: Variable, Complex organic polymer
CAS Number: 8062-15-5
Recommended Use: Applications cover dust suppression, cement additive, dispersant, and animal feed additive
Distributor/Supplier: Manufacturer's details provided on packaging or shipment documents
Emergency Contact Number: Details listed on container label
Classification: Not classified as hazardous according to GHS; may cause mild irritation on prolonged exposure
Potential Health Effects: Dust or mist may cause irritation to eyes, skin, and upper respiratory tract
Label Elements: Not required under GHS; precautionary statements relate to avoiding contact and inhalation
Environment: Large releases may affect aquatic systems by promoting bacterial degradation
Chemical Identity: Lignosulfonic Acid
Content: 90–100% sulfonated lignin derivatives
Impurities: Inorganic salts (calcium, sodium, magnesium) in trace percentages dependent on origin
Additives: Small amounts of residual sugars and organic acids from manufacturing process may be present
Hazardous Components: Product contains no substances at concentrations which are classified as hazardous to health or the environment under current regulations
Inhalation: Move to fresh air; seek medical attention for persistent cough or discomfort
Eye Contact: Rinse immediately with clean water, holding eyelids open; continue for at least fifteen minutes
Skin Contact: Remove contaminated clothing and wash skin with plenty of water and mild soap
Ingestion: Rinse mouth thoroughly with water; drink small amounts of water if affected; do not induce vomiting unless instructed by medical personnel
Notes to Physician: Symptomatic treatment recommended due to low acute toxicity
Extinguishing Media: Water spray, foam, carbon dioxide, or dry chemical powder suitable for surrounding materials
Special Hazards: Thermal decomposition yields carbon monoxide, sulfur oxides, and low molecular weight organic compounds; product will burn if sufficiently heated
Protective Equipment: Firefighters should wear self-contained breathing apparatus and standard protective clothing
Other Instructions: Prevent firefighting water from entering drains or watercourses in large amounts
Personal Precautions: Avoid inhalation of dust; ventilate area and wear protective equipment including gloves and eye protection
Environmental Precautions: Prevent entry into drains, sewers, or watercourses; lignosulfonates can contribute to oxygen demand in aquatic environments
Cleanup Methods: Sweep or vacuum spills and transfer to appropriate containers for disposal; clean area with water; large spills require containment with inert material (sand, earth)
Reference to Other Sections: For personal protective equipment, see Exposure Controls and Personal Protection section
Safe Handling: Handle in well-ventilated areas; minimize dust generation and accumulation; avoid prolonged or repeated contact with skin and eyes
Storage Conditions: Store in cool, dry, well-ventilated areas away from direct sunlight and incompatible materials such as strong oxidizers; prevent moisture ingress to reduce clumping
Technical Measures: Use sealing containers; keep away from sources of ignition
Incompatible Materials: Strong acids, strong bases, oxidizing agents
Workplace Exposure Limits: No occupational exposure limits established for lignosulfonic acid; control dust to occupational nuisance dust limits (typically 10 mg/m³ for total inhalable dust)
Engineering Controls: Use adequate ventilation or local exhaust; process enclosures recommended to reduce dust exposure risks
Personal Protective Equipment:
— Respiratory Protection: Approved dust mask if airborne concentrations exceed nuisance levels
— Skin Protection: Gloves and work clothing to minimize contact
— Eye Protection: Safety goggles or glasses with side shields
Hygiene Measures: Do not eat, drink, or smoke while handling; wash hands after contact
Appearance: Brown to dark brown powder, granulate, or liquid (dependant on product variant)
Odor: Mild, characteristic odor similar to wood or molasses
pH: Typically acidic; pH of 2–5 for aqueous solutions (10% w/v)
Melting Point: Not applicable (decomposes on heating)
Boiling Point: Not applicable (polymeric solid)
Vapor Pressure: Not measured; negligible at ambient temperature
Solubility: Readily soluble in water
Relative Density: 1.25–1.40 (powder); up to 1.3 (liquid)
Partition Coefficient (n-octanol/water): Not measured; expected low potential for bioaccumulation due to high solubility and molecular weight
Viscosity: Solution-dependent; typically low to moderate
Decomposition Temperature: Above 200°C with evolution of fumes
Stability: Stable under standard handling and storage conditions; avoid excessive moisture and high temperatures
Reactivity: No known hazardous reactions under intended use
Hazardous Reactions: Can react with strong oxidizing agents to release heat and gases
Decomposition Products: Carbon dioxide, carbon monoxide, sulfur oxides, and small amounts of organic acids released on combustion or thermal degradation
Storage Incompatibility: Avoid storing with oxidizing chemicals such as nitrates, peroxides, or strong acids
Acute Toxicity: Available data shows low acute oral and dermal toxicity in animal studies; LD50 values (oral, rat) above 2,000 mg/kg
Skin and Eye Irritation: Slight, non-permanent irritation possible; repeated contact can cause dryness or mild redness
Respiratory Sensitization: Prolonged dust inhalation may irritate respiratory tract
Chronic Effects: No evidence of carcinogenic, mutagenic, or reproductive toxicity in animal models
Ingestion: May cause mild gastrointestinal effects if large amounts are swallowed
Ecotoxicity: Not acutely toxic to fish or aquatic invertebrates in standard testing; may cause indirect aquatic impact by increasing biological oxygen demand at high concentrations
Biodegradability: Lignosulfonic acid is biodegradable by soil microorganisms, though degradation rate depends on local environmental factors
Bioaccumulation Potential: Does not bioaccumulate due to high solubility in water and complex polymer structure
Mobility in Soil: Mobile in water; can percolate through soils but binds to organic matter or minerals over time
Other Hazards: None known; product does not contain persistent or hazardous metals or organic toxins
Product Disposal: Dispose of in accordance with local, regional, national or international regulations; small amounts can be landfilled or incinerated
Packaging Disposal: Clean containers before recycling or disposal; contaminated packaging handled as product waste
Special Precautions: Avoid discharge to natural water bodies in concentrated form; large volumes require industrial waste management
Waste Codes: Not regulated as hazardous waste under standard legal codes
UN Number: Not classified as dangerous for transport
Transport Hazard Class: Not hazardous
Packing Group: Not applicable
Environmental Hazards: Not considered environmentally hazardous for transport
Special Precautions: Protect from moisture; avoid spillage and dust generation during loading and unloading
Regulatory Status: Not subject to international transport regulations such as ADR, IMDG, IATA
Classification: Does not require hazard labeling under GHS or comparable national regulations
Chemical Inventory Status: Listed in major chemical inventories including TSCA, EINECS, DSL, AICS
OSHA Status: Not regulated as hazardous under OSHA Hazard Communication Standard
REACH Registration: Pre-registered or fully registered as required for European markets
Other Regulatory Statements: Food and agricultural applications subject to additional local legislation; product not intended for direct food contact unless certified
