According to the methods, it is found that linalool, geraniol, citral, citral dimethyl acetal, α-terpineol and terpinen-4-ol have a hair growth-promoting activity.

According to the methods, it is found that linalool, geraniol, citral, citral dimethyl acetal, α-terpineol, terpinen-4-ol and urea have a blood circulation-promoting activity.

The esters can be used in the manufacture of citral, precursors to citral and other products or precursors such as vitamins, nutritional supplements, flavorings, fragrances and other products.

The invention concerns the use of citral as nail hardener, The citral is preferably of natural origin, used in amounts less than 5 wt. % in a nail varnish, or in a varnish base layer or in a nail care base.

The derivatives replace the aldehyde group in citral or citronellal with a hydroxy group.

The chemical name of citral is 3,7-dimethyl-2,6-octadienal.

Its flavour comes from the terpenes citronellal, citronellol, citral, and geraniol.

Citral α and citral β, major components of lemongrass oil, block the growth of different kinds of bacteria (gram-positive and gram-negative) [199].

Contains nerol, citral, MMDHCA, linalool may produce an allergic reaction.

In particular, the terpenes disclosed are thymol, eugenol, geraniol, citral and L-carvone.

Provided is a complex antibacterial composition comprising citral and a conventional antibiotic substance, as active ingredients.

In effective amounts, citral is delivered in an oral product for convenient oral cleansing and breath freshening benefits.

Citral α and citral β, major components of lemongrass oil, block the growth of different kinds of bacteria (gram-positive and gram-negative).

The composition includes an alkadienal such as citral, neral or geranial and a carrier material.

In particular, the derivatives maintain the fragrance characteristics of citral, while lowering the allergic properties, and lemony flavors and fragrance with a longer shelf-life than citral, are disclosed.