What does sulphurize mean?
Sulphurize is a technical verb meaning to treat, combine, or impregnate something with sulfur. Its best-known industrial use is in processing rubber, where sulfur is added so that the material becomes more durable and resistant to heat. In mining and metallurgy, related processes use sulfur or sulfur-bearing compounds to alter the chemical composition of ores and other materials. Sulphurize also has a historical application to fumigation: burning sulfur was used to disinfect warehouses, ships, and other enclosed places and to control insects and other pests. Today this older sense is less common outside specialized historical discussion, while the general chemical sense remains in technical and industrial vocabulary. The British spelling is sulphurize, and American English normally uses sulfurize. Although the verb can sound old-fashioned when associated with fumigation, it remains a precise term for introducing sulfur into another substance or for converting a material into a sulfur-containing form.
verbTo treat, combine, or impregnate something with sulfur, especially in an industrial or chemical process. It may also refer historically to fumigating an enclosed space with sulfur fumes.
- To combine, treat, or impregnate a material with sulfur or a sulfur compound.
- To fumigate an enclosed space using sulfur fumes, especially for pest control.
"The factory uses sulfur to sulfurize rubber during vulcanization."
"The compound is sulfurized before it is used as a fungicide."
"Workers sulfurized the empty warehouse before storing grain there."
Once used to fumigate ships and warehouses with sulfur fumes, sulphurize now survives mainly in specialist industrial and chemical language.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does sulphurize come from?
Sulphurize is an English verb formed from the element name sulphur and the suffix -ize, which indicates treating with or converting into a particular substance. The element name sulphur comes through Latin from sulphur, although the deeper origin of the Latin word is uncertain. Related English forms such as sulphuric, sulphate, and sulfide belong to the same sulfur-bearing family, while sulfurize is the American spelling of the verb.
Related word forms
How sulphurize is actually used
The spelling sulphurize is standard in British English, while sulfurize is standard in American English. The verb is mainly technical and industrial; its older fumigation sense may sound archaic outside historical or pest-control contexts.
Easily confused with sulphurize
Sulphurize is a verb meaning to treat or combine something with sulfur, whereas sulphurous is an adjective describing something that contains sulfur or has a sulfur-like smell.