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Saint Helens

(Encyclopedia)Saint Helens, metropolitan borough (1991 pop. 114,397), NW England, in the Greater Liverpool metropolitan area. It is a major center of glass manufacture in England. The city also has iron and brass f...

Prussian blue

(Encyclopedia)Prussian blue, pigment widely used for laundry bluing, in dyeing compounds, and in the manufacture of inks and paints. Several varieties are known, one of which consists of the chemical compound ferri...

Orekhovo-Zuyevo

(Encyclopedia)Orekhovo-Zuyevo əryĕˈkhəvə-zo͞oˈyĭvə [key], city (1989 pop. 137,000), W central European Russia, on the Klyazma River. There is a large textile industry (dating from the 18th cent.) and a maj...

Cheremkhovo

(Encyclopedia)Cheremkhovo chĕrĭmkôˈvə [key], city (1989 pop. 74,000), SE Siberian Russia, on the Trans-Siberian RR. The center of the Cheremkhovo coal basin, the city forms part of a minor industrial complex b...

Kotka

(Encyclopedia)Kotka kōtˈkä [key], city (1998 pop. 55,551), Southern Finland prov., SE Finland, on the Gulf of Finland. It is a major export center for paper, pulp, and timber, and it has chemical industries. It ...

Kruševac

(Encyclopedia)Kruševac kro͞oˈshĕväts [key], town (1991 pop. 58,808), Serbia. A commercial center, it has a hydroelectric plant and an important chemical industry. The seat of the kings of Serbia until 1389, it...

Bobruysk

(Encyclopedia)Bobruysk bəbro͞oˈēsk [key], Belarusian Babruysk, city, central Belarus, a port on the Ber...

caustic

(Encyclopedia)caustic, any strongly corrosive chemical substance, especially one that attacks organic matter. A caustic alkali is a metal hydroxide, especially that of an alkali metal; caustic soda is sodium hydrox...

Pontoise

(Encyclopedia)Pontoise pôNtwäzˈ [key], city (1990 pop. 28,463), capital of Val-d'Oise dept., N central France. It is the site of a technical school. The metallurgy and chemical industries are important. A “new...

sodium hydroxide

(Encyclopedia)sodium hydroxide, chemical compound, NaOH, a white crystalline substance that readily absorbs carbon dioxide and moisture from the air. It is very soluble in water, alcohol, and glycerin. It is a caus...