Is it farther or further?
1790 (sulphat), from French sulphate (1787), from Modern Latin sulphatum acidum, from Latin sulpur, sulphur (see sulfur) + chemical ending -ate (3). The spelling with -ph- is standard in Britain.
sulfate sul·fate (sŭl'fāt')n.
A salt or an ester of sulfuric acid.
The bivalent group SO4.
A chemical compound containing such a group.
To treat or react with sulfuric acid or a sulfate.
To become sulfated.