- ▸ Rubber process oil: Extender and process oil for rubber compounds.
- ▸ Lubricant base oil: Base fluid for greases and metalworking fluids.
- ▸ Plasticizer: Plasticizing oil for adhesives, sealants, and inks.
- ▸ Electrical oils: Base oil for transformer and insulating fluids.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Naphthenic oil (CAS 64742-52-5) is a hydrotreated heavy naphthenic petroleum distillate. Its low pour point and high solvency make it a process and extender oil for rubber, a base oil for greases and metalworking fluids, and a plasticizer for adhesives and inks.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 265-155-0
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Solutions Using This Product
Process-solution guides on this site that specify this chemistry:
- Base Oils for Lubricant & Metalworking Fluid Formulation (Industrial Manufacturing)
- Quenchants for Heat Treatment (Quench Oils & Polymer) (Industrial Manufacturing)
- Way & Slideway Oils (Tackified) (Industrial Manufacturing)
Frequently Asked Questions
What is naphthenic oil used for?
Naphthenic oil (CAS 64742-52-5) is a hydrotreated heavy naphthenic petroleum distillate used as a rubber process and extender oil, a base oil for greases and metalworking fluids, a plasticizer for adhesives, sealants and inks, and a base oil for transformer and insulating fluids. Its low pour point and high solvency drive these uses. RawSource supplies it in bulk.
Is naphthenic oil better than paraffinic oil?
Neither is universally better — the choice depends on the application. Naphthenic oils offer higher solvency and lower pour points, favoring rubber, adhesives, inks and low-temperature fluids, while paraffinic oils offer higher oxidation stability and viscosity index. Specify your end use when requesting a quote so the correct grade is matched.
In which products are naphthenic oils usually found?
They are commonly found in rubber compounds (as process/extender oils), greases and metalworking fluids, adhesives, sealants and printing inks, and transformer/insulating fluids. The grade selected depends on viscosity and solvency requirements of the formulation.
What is the HS code for naphthenic oil?
Naphthenic oil classifies under HS 2710.19 — petroleum oils (other than crude) not elsewhere specified, not containing biodiesel. Verify the destination tariff line with your customs broker; commercial and origin documentation is provided with each shipment.
What is the cost of bulk naphthenic oil?
Bulk pricing varies with viscosity grade, packaging, and volume. Contact RawSource with your viscosity target and quantity (drums, totes, or bulk) for a current quote, CoA, and SDS.
What is the REACH and TSCA regulatory status of Naphthenic Oil (Naphthenic Base Oil)?
Naphthenic Oil (Naphthenic Base Oil) (CAS 64742-52-5) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 265-155-0).