Lubricants & Metalworking — CAS 64741-88-4
Paraffinic Base Oil
Group I / Group II Industrial Grade
Solvent-refined and hydrotreated paraffinic base stocks for lubricant blending, metalworking fluids, transformer oil, process oil, and rubber compounding. Multiple viscosity grades.
CAS Number
64741-88-4
Flash Point
Above 200 °C
Base Stock
Group I / Group II
Pack Sizes
Drums · Totes · Bulk
Structural Diagram
Paraffinic hydrocarbon base stock — Group I / Group II
Safety & Regulatory
- NFPA Health
- 0 — Minimal hazard
- NFPA Flammability
- 1 — Slight hazard
- NFPA Reactivity
- 0 — Stable
- OSHA PEL (mist)
- 5 mg/m³ (oil mist)
- ACGIH TLV (mist)
- 5 mg/m³ TWA
- DOT Hazard Class
- Not regulated (non-flammable)
- Packing Group
- Not applicable
Grades & Packaging
Available Grades
Pack Sizes
Also Known As
Physical & Chemical Properties
| CAS Number | 64741-88-4 (Group I) / 64742-54-7 (Group II) |
| Appearance | Clear to pale yellow liquid |
| Viscosity Range | 100–600 cSt at 40 °C (grade-dependent) |
| Viscosity Index | 95–105 (Group I) / 100–115 (Group II) |
| Flash Point | Above 200 °C (392 °F) |
| Pour Point | −6 to −15 °C (grade-dependent) |
| Density | 0.860–0.900 g/cm³ at 15 °C |
| Sulfur Content | Below 0.03% (Group II) |
| Color (Saybolt) | L0.5–L2.0 |
| Aromatic Content | Less than 1% (Group II) |
| Oxidation Stability | Good (Group I) / Excellent (Group II) |
| Biodegradability | Not readily biodegradable |
Industrial Applications
Industrial Lubricant Blending
Paraffinic base oil is the primary base stock for industrial lubricant blenders producing gear oils (ISO 68–680), hydraulic fluids (AW32–AW68), and circulating oils for industrial machinery.
Metalworking Fluids
Used as the base for cutting oils, forming fluids, quench oils, and rust preventatives for Texas manufacturing and machining operations.
Transformer & Electrical Insulating Oil
Highly refined paraffinic base oil (Group II, low sulfur, low aromatic) is used as transformer oil and electrical insulating fluid meeting IEC 60296 and ASTM D3487 specifications.
Rubber & Plastics Processing
Used as a process oil and extender oil in rubber compounding, plastics processing, and polymer film production operations.
Marine & Industrial Gear Oil
Base stock for marine gear oils, open gear lubricants, and industrial gear oil formulations for heavy-duty enclosed gearboxes.
Dust Suppression & Road Oiling
Technical grade paraffinic base oil is used for dust suppression on unpaved roads and industrial sites, and as a road oiling agent.
Why Source Paraffinic Base Oil from Texas-Chem?
- Group I and Group II grades available — solvent-refined and hydrotreated
- Multiple viscosity grades (100–600 cSt) for gear oil, hydraulic, and process oil formulation
- Low sulfur Group II grades for modern lubricant formulations requiring extended service life
- SDS, COA, and lot traceability on every order
- Nationwide delivery from Fort Worth, TX — drums, totes, and bulk tanker
Frequently Asked Questions — Paraffinic Base Oil
What is the difference between Group I and Group II paraffinic base oil?▾
Group I base oils are produced by solvent refining and contain more sulfur, nitrogen, and aromatic compounds than Group II. Group II base oils are produced by hydroprocessing, which removes most sulfur and improves oxidation stability. Group II is increasingly preferred for modern lubricant formulations requiring longer service life. Texas-Chem supplies both groups; contact us at 855-TEX-CHEM for availability.
What viscosity grade should I use for gear oil blending?▾
Industrial gear oil formulations typically use base oils in the 150–460 cSt range at 40 °C, depending on the target ISO viscosity grade (ISO 68 to ISO 680). Automotive gear lubricants (75W-90, 80W-140) use lighter base oils (100–150 cSt) combined with viscosity index improvers. Contact Texas-Chem for specific grade recommendations.
Can paraffinic base oil be used as transformer oil?▾
Highly refined paraffinic base oil (Group II, low sulfur, low aromatic content) is used as transformer oil and electrical insulating fluid. It must meet IEC 60296 or ASTM D3487 specifications for electrical applications. Contact Texas-Chem for transformer oil grade availability and specification compliance.
What is the difference between paraffinic and naphthenic base oil?▾
Paraffinic base oils have higher viscosity index, better oxidation stability, and higher flash points than naphthenic base oils. Naphthenic base oils have better low-temperature performance, higher solvency for additives, and are preferred for refrigeration oils and transformer oils where low pour point is critical.