Medium Oil 45/55
Medium Oil 45/55 is a petroleum-derived mineral oil that falls within the mid-range viscosity category, typically comprising a blend of 45% light and 55% heavy paraffinic fractions. Known for its excellent solvency, thermal stability, and lubrication properties, Medium Oil is widely used in rubber processing, industrial applications, and chemical blending. It appears as a clear to pale amber liquid with a neutral odor, and it demonstrates good compatibility with various elastomers and polymers. This oil enhances the flexibility, softness, and processing efficiency of rubber compounds while maintaining stability under heat and mechanical stress.
Supplied in 180 kg industrial-grade drums, Medium Oil (45/55) is ideal for large-scale use in manufacturing and processing environments.
Medium Oil 45/55
Primary Uses
- Rubber Processing & Plastics
- Used as a plasticizer and softening agent in SBR, EPDM, and natural rubber compounds.
- Enhances the elasticity and flow properties of molded and extruded rubber products.
- Applied in tire and tube manufacturing to improve processability and filler dispersion.
- Used in thermoplastic elastomers (TPE) to enhance flexibility and reduce hardness.
- Functions as a carrier oil for rubber chemicals and curatives.
- Industrial Lubrication & Manufacturing
- Employed as a base oil in industrial lubricants and metalworking fluids.
- Used as a mold release agent in foundry and plastic molding applications.
- Acts as a processing oil in adhesives, sealants, and caulking compounds.
- Applied in textile lubricants for fiber processing and spinning.
- Used in cable compounds and wire insulation manufacturing.
 Secondary Uses
- Construction and Building Materials
- Incorporated in bitumen-based waterproofing and damp-proofing systems.
- Used in sealants and mastics for road construction and industrial flooring.
- Enhances workability of concrete additives and curing compounds.
- Other Industrial Applications
- Serves as a carrier for defoamers and emulsifiers in specialty chemical formulations.
- Used in printing inks, coatings, and synthetic waxes.
- Acts as a diluent and blending component in various solvent-based products.
1. Basic Identification Attributes
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Chemical Type: Medium Oil Alkyd Resin
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Common/Trade Name: Medium Oil (45/55) Alkyd
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Composition: 45% Phthalic Anhydride, 55% Fatty Acids
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CAS Number: 63148-69-6
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HS Code: 3907.99
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Synonyms: Medium Oil Alkyd Resin, Universal Alkyd Resin
2. Physical & Chemical Properties
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Physical State: Viscous liquid
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Color & Odor: Amber colored; characteristic resinous odor
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Solubility: Soluble in mineral spirits, aromatic solvents
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Viscosity: 8,000-15,000 mPa·s at 25°C
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Main Components: Modified polyester resin, vegetable oil derivatives
3. Safety & Hazard Attributes
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GHS Classification: Flammable liquid; may cause skin and eye irritation
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Toxicity: Low acute toxicity; contains organic solvents
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Exposure Limits: Follow solvent exposure limits for hydrocarbon mixtures
4. Storage & Handling Attributes
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Storage Conditions: Store in cool, well-ventilated area away from heat sources
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Container Type: 180 kg steel drums
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Shelf Life: 24 months in sealed containers
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Handling Precautions: Use proper grounding; avoid contact with strong oxidizers
5. Regulatory & Compliance Attributes
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Complies with industry standards for alkyd resin specifications
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Meets relevant safety standards for solvent-based products
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Suitable for industrial coating formulations
6. Environmental & Health Impact
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Biodegradability: Slow biodegradation
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Ecotoxicity: Moderate impact due to solvent content
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Bioaccumulation: Not expected for resin component
Safety Handling Precautions
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PPE Required: Chemical-resistant gloves, safety glasses, organic vapor respirator
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Handling Guidelines: Use in well-ventilated areas; avoid skin contact and breathing vapors
First Aid Measures
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Inhalation: Move to fresh air; seek medical attention if symptoms persist
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Skin Contact: Wash thoroughly with soap and water; remove contaminated clothing
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Eye Contact: Rinse cautiously with water for several minutes; seek medical attention
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Ingestion: Do not induce vomiting; seek immediate medical care
Firefighting Measures
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Fire Hazards: Combustible liquid; vapors may explode if ignited
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Extinguishing Media: Foam, COâ‚‚, dry chemical powder
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Special Precautions: Use water spray to cool exposed containers

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