azufre

n. sulphur, nonmetallic element (Chemistry); sulfur, brimstone

v. sulphurate, treat or combine with sulphur (Chemistry); sulphurize, treat with sulphur; fumigate with sulphur or sulphur dioxide

= brimstone, sulphur [sulfur, -USA].
Ex: He recommended me to carry a small piece of brimstone sewed up in a piece of very thin linen to bed with me, and if I felt any symptom of cramp to hold it in my hand.
Ex: Photographs should be stored in non-hygroscopic containers which are free of sulphur, acids, and peroxides.
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* dióxido de azufre = sulphur dioxide.