Benzidine is an organic compound with the chemical formula C12H12N2. It is a rayish-yellow, reddish-gray, or white crystalline solid that is slightly soluble in water.

Benzaldehyde is the most important aromatic aldehyde, both in nature and industry, with the formula C7H6O. It is a colorless liquid with a distinctive odor resembling bitter almond.

Aziridine, also known as ethylenimine, is a saturated heterocyclic amine with the formula C2H5N. It is a colorless, volatile liquid with a strong, unpleasant odor that is highly reactive due to the strain in its three-membered ring.

4-Nitrophenol, also known as p-nitrophenol or 4-hydroxynitrobenzene, is an aromatic compound with the chemical formula C6H5NO3. It is a yellow to colorless crystalline solid with a sweet, phenolic odor. It is soluble in water, ethanol, and other organic solvents.

Anthraquinone is an organic compound with the formula C₁₄H₈O₂. It is a yellow, crystalline solid that is nearly insoluble in water and organic solvents at room temperature. Its solubility increases with temperature.

Anthracene is a solid polycyclic aromatic hydrocarbon with the formula C14H10 that is composed of three fused benzene rings. It is a component of coal tar and was discovered in 1832 by J. Dumas and H. A. Laurent. Anthracene is colorless but exhibits a blue fluorescence under ultraviolet radiation.

Benzal chloride (C6H5CHCl2) is a colorless liquid that is synthesized by chlorinating the side chain of toluene. It is also known as dichloromethylbenzene, α,α-dichlorotoluene, or benzylidene chloride. The first synthesis of benzal chloride was reported in 1848 by A. Cahours, who reacted benzaldehyde with phosphorus pentachloride (PCl5).

Benzyl chloride, also known as α-chlorotoluene, is a toluene derivative with chlorine substitution in the side chain. It is a colorless liquid withthe chemical formula C7H7Cl.

Benzonitrile is an organic compound with the formula C7H5N, abbreviated PhCN. It is a colorless liquid with a sweet bitter almond odor. It is mainly used as a precursor to the resin benzoguanamine.

Calone 1951 or watermelon ketone is a synthetic organic compound with the formula C11H12O2. It is a white powder with a fresh, marine odor. Watermelon ketone is used in the fragrance industry to create fresh aquatic marine notes.

Allyl alcohol is an organic compound with the chemical formula C3H6O. It belongs to the class of alcohols and contains both a hydroxyl group (-OH) and an allyl group (-CH2CH=CH2). It is an important chemical intermediate used in various industries.

Allyl chloride, also known as 3-chloropropene, is an organic compound with the chemical formula C3H5Cl. It is a colorless to pale yellow liquid that holds significance in the field of organic chemistry due to its reactivity and industrial applications.