Sulphur, city (1990 pop. 20,125), Calcasieu parish, SW La.; inc. 1914. It is a trade center for an area producing natural gas, oil, and timber as well as sorghum, soybeans, cattle, and crawfish. Industry centers chiefly around petroleum products, chemicals, and related enterprises. Engines, concrete products, machinery, and lumber are also manufactured. The city was named for a sulfur dome that was mined from 1894 to 1924. In 1924 oil was discovered nearby.
sulphur: see sulfur.
or sulfur butterfly

Any of several species of butterflies (family Pieridae) that are found worldwide. Adults have a wingspan of 1.5–2.5 in. (35–60 mm). The colour and pattern of many species vary seasonally and between sexes, but they are generally bright yellow or orange. Some have two colour patterns; for example, Colias eurytheme is usually orange with black wing margins, but some females are white with black margins. Pupae are attached to a twig by a posterior spine and a girdle of silk. The larvae feed on clover and may seriously damage crops.

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Any of a diverse group of bacteria that are capable of metabolizing sulfur and its compounds and are important in the sulfur cycle. Members of the genus Thiobacillus, widespread in marine and terrestrial habitats, react with sulfur to produce sulfates useful to plants; in deep ground deposits they generate sulfuric acid, which dissolves metals in mines and corrodes concrete and steel. Desulfovibrio desulficans reduces sulfates in waterlogged soils and sewage to hydrogen sulfide, a gas with the common rotten-egg odour.

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Sulfur crystals from Sicily (greatly enlarged)

Nonmetallic chemical element, chemical symbol S, atomic number 16. It is very reactive but occurs native in deposits, as well as combined in various ores (e.g., pyrite, galena, cinnabar); in coal, petroleum, and natural gas; and in the water in sulfur springs. Sulfur is the third most abundant constituent of minerals and one of the four most important basic chemical commodities. Pure sulfur, a tasteless, odourless, brittle yellow solid, occurs in several crystalline and amorphous allotropes, including brimstone and flowers of sulfur. It combines, with valence 2, 4, or 6, with nearly all other elements. Its most familiar compound is hydrogen sulfide, a poisonous gas that smells like rotten eggs. All metals except gold and platinum form sulfides, and many ores are sulfides. The oxides are sulfur dioxide and sulfur trioxide, which when dissolved in water make sulfurous acid and sulfuric acid, respectively. Several sulfur compounds with halogen elements are industrially important. Sodium sulfite (Na2SO3) is a reducing agent used to pulp paper and in photography. Organic compounds with sulfur include several amino acids, the sulfa drugs, and many insecticides, solvents, and substances used in making rubber and rayon.

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Sulphur (Soufre) is a city in Calcasieu Parish, Louisiana, United States. The population was 22,512 at the 2000 census. It is part of the Lake Charles Metropolitan Statistical Area.


In late September 2005, Hurricane Rita made landfall on the Texas-Louisiana border, damaging thousands of homes and businesses in Calcasieu and the surrounding parishes, as well as most of Southern Louisiana and Texas mostly Louisiana. Calcasieu Parish, along with Cameron Parish was extensively damaged by the hurricane.


Sulphur is located at (30.230355, -93.360837) and has an elevation of .

According to the United States Census Bureau, the city has a total area of 10.0 square miles (26.0 km²), all of it land.


As of the census of 2000, there were 22,512 people, 7,901 households, and 5,601 families residing in the city. The population density was 2,043.0 people per square mile (788.8/km²). There were 8,665 housing units at an average density of 863.0/sq mi (333.2/km²).

The racial makeup of the city was 93.43% White, 4.41% African American, 0.33% Native American, 0.37% Asian, 0.04% Pacific Islander, 0.35% from other races, and 1.06% from two or more races. Hispanic or Latino of any race were 1.49% of the population.

There were 7,901 households, out of which 34.6% had children under the age of 18 living with them, 53.2% were married couples living together, 13.8% had a female householder with no husband present, and 29.1% were non-families. 24.9% of all households were made up of individuals and 10.1% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 3.06.

In the city the population was spread out with 27.1% under the age of 18, 9.5% from 18 to 24, 28.2% from 25 to 44, 21.7% from 45 to 64, and 13.4% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 92.1 males. For every 100 females age 18 and over, there were 88.9 males.

The median income for a household in the city was $38,247, and the median income for a family was $45,455. Males had a median income of $38,235 versus $22,500 for females. The per capita income for the city was $21,615. About 7.5% of families and 9.3% of the population were below the poverty line, including 10.0% of those under age 18 and 11.5% of those age 65 or over.

Notable natives and residents

External links


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