Bright stock base oil, specifically BS 150, is a high-viscosity oil positioned at the upper end of the specifications for Grade I base oils. Produced through atmospheric and vacuum distillation at Group I refineries, brightstock is extracted and dewaxed from residual oils and undergoes hydro finishing.
Viscosity Specifications Bright stock Base oil:
- BS 150 Viscosity: 28.0-33.5 cSt at 100°C
- BS 150 Viscosity: 461-597 cSt at 40°C
Most of Group III and Group II refineries have no possibility to produce such heavy grades as brightstock, only few of them can make base oils with viscosity @ 100C above 20 cSt, which creates a high demand for this product.
Applications of Bright stock Base Oil
- Engine oils
- Transmission fluids
- Gear oils
- Metalworking fluids
- Greases
- Hydraulic oils
- Transformer oils
Packaging Options:
Bright stock Base Oils can be supplied in various formats, including:
- Flexi-containers
- ISO-tanks
- IBCs in 20-foot containers
- Bulk vessels for export
- Trucks within Europe
- In CIS countries the product is available in rail tank cars
For colder destinations, we recommend ISO-tank delivery with heating, as Brightstock Base Oil becomes too viscous near 0°C.
Bright stock Base Oil: product details
Origin: EU, Central Asia
Hazard class: BS 150 base oil is classified as not dangerous goods
CAS Number: 64742-54-7
EC Number: 265-157-1
DYM Resources specializes in the bulk purchase and worldwide distribution of BS 150 Bright stock Base Oils, serving regions such as Europe, USA, Canada, Latin America, Africa, and Asia — including Argentina, Brazil, Colombia, Turkey, Vietnam, and China.
To choose a particular product for your application or find out bright stock base oil price please contact our sales department: info@dymresources.com.
Bright stock base oil specification (ВS-150)
| Parameters | Units | Guaranteed | Typical |
|---|---|---|---|
| Appearance | – | C&B | C&B |
| Color ASTM | – | Max 0,5 | L0,5 |
| Kinematic viscosity at 40 °C | mm2/s | – | 445,5 |
| Kinematic viscosity at 100 °C | mm2/s | 33,5 – 35,5 | 33,8 |
| Viscosity index | – | Min 105 | 111 |
| Pour point | °C | Max -15 | -18 |
| Flash point | °C | Min 250 | 262 |
| Sulfur | wtppm | Max 100 | 3,4 |
| Aromatics | % | – | 0,0 |
FAQ about Bright stock Base Oil (BS 150)
Base oil and bright stock are not the same, though they are closely related.
Key Differences:
- Category: Bright stock is a specific type of base oil, whereas base oil is a broader term that includes a range of oils (including bright stock).
- Viscosity: Bright stock is much heavier and more viscous compared to most other base oils.
- Applications: Bright stock is typically used in applications requiring thicker oils, while lighter base oils are used in general-purpose lubricants.
Bright stock is a subset of base oils, but not all base oils are bright stock.