Phenol (C₆H₅OH)

The simplest of the aromatic hydroxy compounds.

Sulphur (S₈)

An odourless, yellow, solid substance, the 16th most common in the Earth´s crust. One of the best known sulphur compounds is pyrite, also known as ´fool´s...

Oleic acid (cis-octadec-9-enoic acid) (C₁₇H₃₃COOH)

An unsaturated monocarboxylic acid. The molecule contains double bond in cis orientation.

Clothing (Western Europe, 15th century)

Clothing reflects the lifestyle and culture of the region's inhabitants.

Ammonia (NH₃)

Ammonia is a colourless gas with a characteristic pungent smell. Its solution in water is called ammonium hydroxide or household ammonia.

Water (H₂O)

Water is a very stable compound of hydrogen and oxygen, vital for all known forms of life. In nature it occurs in liquid, solid and gaseous state.

Cellobiose (C₁₂H₂₂O₁₁)

Cellobiose is the basic structural unit of cellulose.

Bromofluorochloromethane (CHClBrF)

The molecule has two enantiomers: stereoisomers that are mirror images of each other and are not superimposable.

Clothing (Western Europe, 14th century)

Clothing reflects the lifestyle and culture of the region's inhabitants.

Carbamide (urea) (CO(NH₂)₂)

An organic compound in the urine of mammals, used in the production of fertilisers as a source of nitrogen.

Benzene (C₆H₆)

Benzene is the simplest aromatic hydrocarbon.

Hydronium ion (H₃O⁺)

The presence of hydronium ions relative to hydroxide ions determines a solution´s pH.

Sulphate ion (SO₄²⁻)

A compound ion produced when sulphuric acid releases protons.

Trans-2-butene (C₄H₈)

A colourless, heavier-than-air gas. Its geometric isomer is cis-2-butene.

Nitrate ion (NO₃⁻)

A compound ion, the main source of nitrogen for plants.

Ethane (C₂H₆)

The second member in the homologous series of straight-chain alkanes.

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