Brimstone

Brimstone is another name for Sulfur.

Sulfur is the chemical element with atomic number 16. In the periodic table it is represented by the symbol S. It is an abundant, multivalent non-metal. Under normal conditions, sulfur atoms form cyclic octatomic molecules with chemical formula S 8. Elemental sulfur is a bright yellow crystalline solid when at room temperature. Chemically, sulfur can react as either an oxidant or reducing agent. It oxidizes most metals and several nonmetals, including carbon, which leads to its negative charge in most organic sulfur compounds, but it reduces several strong oxidants, such as oxygen and fluorine. It is also the lightest element to easily produce stable exceptions to the octet rule.
 * Characteristics**
 * sulfur forms polyatomic molecules with different chemical formulas, with the best known allotrope being octasulfur.
 * It melts at 115.21 °C, boils at 444.6 °C and sublimes easily.
 * The density of sulfur is about 2 g·cm−3, depending on the allotrope
 * all of its stable allotropes are excellent electrical insulators
 * Sulfur burns with a blue flame concomitant with formation of sulfur dioxide, notable for its peculiar suffocating odor.
 * Sulfur is insoluble in water but soluble in carbon disulfide