The republic Kazakhstan has significant hydrocarbonic resources on a shelf of Caspian sea where prognosis stocks are estimated from 25 up to 60 billion barrels of oil. But it is necessary to consider that passing gas extracted together with oil also is unique raw material. In view of the high content of hydrogen sulphide by processing from passing gas take elementary sulfur which is stored in the form of whom product near to objects of an oil recovery and gas. High rates of oil recovery and gas cause and the increased quantity of stored elementary sulfur on «sulfuric cards» whose volumes exceeded 18 million tons.

It is leads to increase in the area of evaporation of elementary sulfur and formation of the aerosol particles, hanging in air.

The aerosol of the evaporated sulfur has absolutely different physical, chemical properties unlike elementary sulfur. In particular, various toxicological properties of sulfur avaparate at various concentration. For example, sulfur in concentration of 11,3 mg/m³ less toxic than sulfur in concentration 2,43mg/m3. Presumably it is connected with existence of claster ions as aerosols of elementary sulfur.

It is known, that flood of liquid sulfur on sulfuric cards occurs at temperature about 140ºС. In experimental conditions it is shown, that sulfur starts to evaporate at lower temperatures in a range from 20-145ºС that is the pairs consisting mainly from eight-nuclear molecules of elementary sulfur are formed. The atoms of sulfur linked among themselves form cyclic molecules in the form of a crown.

Processes of aerosol of condensation formation sulfur are not visible. However the high maintenance in air, as aerosol of condensation of sulfur with rather large particles are felt in the form of a fog. Aerosols of condensation have the sizes from 0,001 microns up to 10 microns. It is possible to consider as the bottom border of the sizes of aerosols the size of the particle containing one-nuclear molecules of sulfur.

Any substance in the form of an aerosol possesses high chemical activity that is caused by structure of the arising disperse system providing close contact of two various phases on a surface. But at the small sizes of an aerosol particle, deviations chemical and physical properties from properties of separate molecules and from properties of initial substance are found out. They refer to clasters. The substance in clasters condition can enter chemical reactions, not characteristic for it in other conditions, that is in gaseous, liquid or firm. It is possible clasters is one more modular condition of substance.

Clasters are transitive objects between the isolated atoms or molecules and a firm body. They borrow intermediate position between van-der-Vaals the molecules containing of some atoms, and such finely dispersive particles, as aerosols. The bottom limit of number of particles in claster makes units, and top is defined by that addition of one more particle to their set noticeably changes properties of system as a whole. Properties claster nuclear qualitatively differ from properties of macroscopical bodies, as causes interest to them. Being an intermediate link between the molecular and condensed condition of substance. Clasters can be effectively formed of a gas phase during condensation.

So, the toxicological properties sulfurs avaparates differ from known the sulfuric dust effect and, accordingly, their studying is required.