Material Safety Data Sheet for Maleic Resin

Identification

Product Name: Maleic Resin
Chemical Family: Modified Rosin Ester
Chemical Formula: Proprietary mixture, typically maleic anhydride-modified rosin
Synonyms: Hydrogenated gum rosin, Maleated resin, Maleic-modified resin
CAS Number: 8050-26-8
Recommended Use: Adhesives, coatings, inks, varnishes, paint driers, hot-melt products
Manufacturer: Refer to supplier label or invoice
Emergency Contact: Manufacturer’s safety department or local poison control center

Hazard Identification

Signal Word: Warning
Hazard Classification: Skin irritant, Eye irritant, Respiratory tract irritant
Hazard Statements: May cause skin and eye irritation, Prolonged or repeated contact can dry skin, May cause allergic skin reaction, Dust or mists can cause irritation to respiratory tract
Precautionary Statements: Avoid breathing dust, mist, or fumes, Avoid contact with skin and eyes, Wash thoroughly after handling, Wear protective equipment
Physical Hazards: Can accumulate static charges, Combustible under certain conditions
Health Hazards: Overexposure may affect lungs or skin

Composition / Information on Ingredients

Ingredient: Maleic Anhydride Modified Rosin
Chemical Composition: Resin acids and rosin acids, esters with glycerol, partially esterified with maleic anhydride
Proportion: 80–100%
Impurities: May contain trace amounts of unreacted maleic anhydride (0.1–1%) and resin acids
Other Components: Possible traces of free acids, stabilizers, and processing aids

First Aid Measures

Inhalation: Move to fresh air, keep warm and at rest, seek medical attention for symptoms of respiratory distress
Skin Contact: Remove contaminated clothing, wash affected area with soap and water, do not use solvents or thinners, seek medical advice if rash appears
Eye Contact: Flush eyes with water for at least 15 minutes, keep eyelids open, remove contact lenses if present, continue rinsing, get medical help if irritation persists
Ingestion: Rinse mouth, do not induce vomiting, give water to drink only if fully conscious, seek medical attention for persistent symptoms
Notes for Physicians: Treat symptomatically, no specific antidote known

Fire-Fighting Measures

Suitable Extinguishing Media: Dry chemical, CO₂, foam, water spray (do not use high-velocity water jets as resin floats on water)
Unsuitable Extinguishing Media: Direct water streams
Hazards Arising From Combustion: Releases irritating fumes, carbon monoxide, carbon dioxide, possible traces of formaldehyde, toxic hydrocarbons
Protective Equipment: Wear self-contained breathing apparatus, full protective clothing
Firefighting Instructions: Cool containers exposed to fire with water spray, prevent runoff from entering drains or waterways, evacuate area of unprotected personnel
Special Risks: Dust may form explosive mixtures with air

Accidental Release Measures

Personal Precautions: Evacuate all unnecessary personnel, ventilate area, avoid dust formation, use appropriate respiratory protection for dust
Environmental Precautions: Prevent product from entering drains, sewers, waterways, or soil, notify authorities if substance has entered environment
Containment Methods: Stop source of spill, dike area with non-combustible material, cover with plastic sheet to prevent spread
Cleanup Methods: Collect spillage with shovel or vacuum equipment, avoid creating dust, place in closed, labeled containers for disposal, wash spill site after material pickup is complete

Handling and Storage

Handling: Use in well-ventilated areas, avoid inhalation of dust or fumes, avoid contact with skin and eyes, wear suitable personal protective equipment, ground all equipment to minimize static discharge, do not eat, drink, or smoke in work areas
Storage Conditions: Store in tightly sealed original containers, cool, dry, and well-ventilated location, away from direct sunlight, sources of heat, ignition, acids, oxidizers, store at ambient temperature below 35°C, keep separate from foodstuffs, remove all contaminated clothing before storage
Incompatibilities: Strong acids, strong oxidizing agents, alkali materials

Exposure Controls and Personal Protection

Exposure Limit Values: No established occupational exposure limits for resin itself, ACGIH TLV and OSHA PEL for nuisance dust: 10 mg/m³ (total dust), 3 mg/m³ (respirable fraction)
Engineering Controls: Local exhaust ventilation to control dust and fume exposure, maintain adequate general ventilation
Personal Protective Equipment: Wear chemical-resistant gloves (nitrile, neoprene), safety goggles or face shield, protective clothing (long sleeves, closed shoes), use approved dust respirator if exposure limits are approached or exceeded
Hygiene Measures: Wash hands after handling, remove contaminated clothing and wash before reuse, eye wash stations and emergency showers accessible

Physical and Chemical Properties

Appearance: Amber solid, flakes, or pastilles
Odor: Mild characteristic resin odor
Odor Threshold: Not determined
pH: Not applicable (insoluble in water)
Melting Point/Range: 100–150°C (depends on grade)
Boiling Point/Range: Decomposes before boiling
Flash Point: 180–250°C (open cup method)
Evaporation Rate: Not applicable
Flammability: Combustible solid
Vapor Pressure: Negligible at 20°C
Vapor Density: Not applicable
Relative Density: 1.0–1.2 g/cm³
Solubility: Insoluble in water, soluble in aromatic and aliphatic hydrocarbons, some esters and ketones
Partition Coefficient (n-octanol/water): Not determined
Auto-ignition Temperature: >400°C
Decomposition Temperature: >200°C
Viscosity: Not determined for solid form
Molecular Weight: Varies with formulation

Stability and Reactivity

Chemical Stability: Stable under recommended storage and handling conditions
Reactivity: Unreactive under normal conditions
Possibility of Hazardous Reactions: May react with strong oxidizing agents and acids
Conditions to Avoid: Excessive heat, open flame, direct sunlight, moisture, contact with incompatible materials
Hazardous Decomposition Products: Releases carbon monoxide, carbon dioxide, and irritating organic fumes on combustion or thermal decomposition
Polymerization: Does not undergo hazardous polymerization under normal conditions

Toxicological Information

Possible Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Effects: May irritate skin, eyes, and respiratory tract, high dust concentrations can cause coughing, sneezing, throat irritation
Chronic Effects: Repeated contact may cause dermatitis or sensitization, prolonged inhalation of resin dust can aggravate respiratory issues
Toxicity Data: LD₅₀ (oral, rat) > 5000 mg/kg, not considered highly toxic
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, OSHA
Reproductive Toxicity: No data suggesting risk to fertility or fetal development
Mutagenicity: No data indicating mutagenic properties
Target Organ Effects: Skin, eyes, respiratory system on overexposure

Ecological Information

Ecotoxicity: Resin not expected to be acutely toxic to aquatic organisms, may form films or blankets on water surface, affecting aquatic respiration
Persistence and Degradability: Generally considered biodegradable, but persistence possible in bulk amounts
Bioaccumulation Potential: Believed to have low bioaccumulation, minimal uptake by aquatic species
Mobility in Soil: Insoluble in water, expected to remain at site of deposition or slowly break down
Other Adverse Effects: Resin residues can physically foul drains or surface water, may impact oxygen transfer, disposal in the environment discouraged

Disposal Considerations

Product Waste: Recover and reuse if possible, otherwise send to approved waste disposal facility, classified as non-hazardous solid waste (local regulations may vary)
Contaminated Packaging: Clean thoroughly before recycling or disposal, dispose of as industrial waste according to local regulations
Disposal Methods: Incinerate or landfill in compliance with local environmental regulations
Special Precautions: Prevent product or washings from entering drains, watercourses, or soil

Transport Information

UN Number: Not regulated for most forms, non-hazardous for transport purposes
Shipping Name: Maleic resin or Rosin Ester, not classified as dangerous goods
Transport Hazard Class: Not applicable
Packing Group: Not applicable
Transport Label: No special labeling required
Precautions for Transport: Keep away from heat, direct sunlight, strong oxidizers, ensure containers remain upright and securely closed, avoid container damage or leakage during transport

Regulatory Information

OSHA Status: Not regulated as a hazardous substance
TSCA (US): All ingredients listed or exempt
DSL (Canada): All ingredients listed or exempt
REACH (EU): Complies with REACH requirements; registration information available from supplier
SARA 313 (US): Does not contain listed substances
California Prop 65: Not listed as a substance known to cause cancer, birth defects, or other reproductive harm
Hazard Symbols: Irritant (Xi), as required for skin/eye irritation potential
Labeling Requirements: As per GHS: Signal word “Warning”, hazard and precaution statements for skin, eye, and respiratory irritation
Other Regulatory Info: Meets industry safety standards for resin products, ensure compliance with local environmental, health, and safety regulations for storage, use, and disposal