ADDITIN® RC 2540
Highly active, low viscosity, light colored sulfur carrier
Additin® RC 2540 is a highly active, light-colored, and nearly odorless sulfur carrier that is well soluble in most types of base oils. Due to its extremely high sulfur activity, it is an excellent choice for manufacturing metalworking fluids suitable for a wide range of heavy-duty metal removal and metal forming processes. It is also an outstanding replacement for chlorinated paraffins.
Additin® RC 2540 shows significant sulfur activity even at moderately elevated temperatures of 50 to 60°C (122 to 140°F). As the temperature increases, it provides a steadily increasing active sulfur level, reaching up to 90% of its total sulfur content at 150°C (302°F). Because of its high sulfur content, Additin® RC 2540 can be used in combination with other sulfur carriers to enhance their extreme pressure (EP) activity.
The performance of metalworking oils containing Additin® RC 2540 can be further improved by synergistic combinations with overbased sulfonates like Calcinate® OR or by polar compounds like Additin® RC 8000 or Additin® RC 8100. Zinc dithiophosphates, such as Additin® RC 3038, phosphoric acid partial esters like Additin® RC 3760, or ashless phosphorus-sulfur additives such as Additin® RC 3890 are also excellent complements to Additin® RC 2540. Additin® RC 2540 is easily emulsifiable and performs effectively as an EP booster for soluble oils and semisynthetic metalworking fluid emulsions.
The most important product advantages at a glance:
- high EP performance
- fast sulfur release
- light color
- low odor
- low viscosity
- excellent solubility
Further information on this product and the entire product group can be found on the corresponding brand website: Additin® Extreme-Pressure additives

Brand
ADDITIN®
Product Type
Specialties
Delivery Form
Liquid
Packaging Format
BFX | Grades are delivered in different packaging materials. Please ask your local contact about the packaging for the grade in question
Deep drawing
Metal removal with geometrically undefined cutting edge
Stamping
Gun drilling / Deep hole drilling
Cold impact extrusion / cold heading
Metal forming
Watermiscible semisynthetic fluids
Lapping
Neat oils
Gear shaving / gear hobbing
Reaming
Broaching
Turning, Drilling, Milling
Metal removal with geometrically defined cutting edge
Metalworking fluids
Honing
Thread forming
Grinding
Soluble oils
Fine blanking
Thread cutting
dialkylpolysulfide
sulfurized hydrocarbon
sulfurized diisobutene
sulfurized olefin
polysulfide
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FREQUENTLY ASKED QUESTIONS (FAQ)
EP additives form protective layers on metal surfaces that prevent adhesive wear under boundary and mixed friction conditions. The common types of Extreme Pressure additives are sulfur- based compounds, phosphorus- based compounds, chlorine-based compounds. LANXESS has a bright product portfolio of sulfur-based products Additin® EP and phosphorus-based products Additin® AW.
They are essential ingredients of most metalworking fluids, industrial lubricants like gear oils or slideway oils and EP greases.
They prevent cold welding of the gears tooth faces and flanks under high pressure conditions, particularly during starting, stopping or shock load processes.
This finally depends on the specific process or application in which the lubricant is supposed to be used. Our Application Technology team is happy to support you with further information. Please contact us here.
Sulfur carriers, chlorinated paraffins, some phosphorus compounds.
Short chain chlorinated paraffins (chain-length C10 – C13) are already banned and eliminated from metalworking fluid formulations in Europe and many other countries, due to their persistency in the environment with a high potential for bioaccumulation, and because of their classification as toxic to aquatic organisms, carcinogenic to rats and mice and possibly carcinogenic to humans. Medium chain chlorinated paraffins (chain-length C14 – C17) are also already banned or at least supposed to be banned in many countries within the next years because of their risks to the ecosystem and to human health. Many chlorinated paraffins are categorized according to the globally harmonized system of classification and labelling of chemicals as “very toxic to aquatic life with long lasting effects”. Sulfur carriers do not show any kind of hazard classification.
Depending on the specific metalworking process and the metal that is machined, different sulfur carriers or synergistic combinations of sulfur carriers and other additives can even exceed the performance of CLPs in metalworking fluids. In case you need recommendations or guideline formulations for specific metalworking applications, please contact our Application Technology team.