EP-890
Bis-DMTD (2,5-dimercapto-1,3,4-thiadiazole derivative)
Dual-function: extreme-pressure sulphur carrier and copper passivator in the same molecule. Very high sulphur content means low treat rates, which matters when you are trying to hold a viscosity target.
- Sulphur
- 62 – 67%
Typical values, not a specification. The binding specification is the one on the certificate of analysis issued against each batch.
- CAS number
- 72676-55-2
- EC number
- 276-763-0
Grades a formulator would benchmark EP-890 against. Naming them is not a claim of equivalence — it is where to start the comparison.
Extreme-Pressure Additives
Load-carrying film former under boundary lubrication
Active and inactive sulphur carriers that decompose at asperity contact temperatures and lay down an iron sulphide film. This is what stands between a gear tooth and scuffing failure. Sulphur activity level is the variable that decides yellow-metal compatibility.
A full technical data sheet, safety data sheet in the language of the receiving country, REACH status statement and SVHC declaration are issued with every enquiry for EP-890. Certificates of analysis accompany each consignment and retained samples are held for the full shelf life.
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