Its best-known solid allotrope is an eight atom ring.
A method for obtaining this element from solid materials using three concentric pipes is named for Frasch. Its best-known solid allotrope is an eight atom ring. This element is isolated from a binary compound it forms with hydrogen via the Claus process. It is the most common additive in a process that cures rubber, called vulcanization. This element heavily influences protein structure by forming bonds to itself between different cysteine residues, and it is also present in methionine. For 10 points, name this element also known as brimstone.
A method for obtaining this element from solid materials using three concentric pipes is named for Frasch.
{sulfur} [or {S}; prompt on {brimstone} before it is read]