The important products have the following structures.

Organotin mercaptides are not only able to react with hydrogen chloride or annihilate initiating sites by substitution, but also help impede autoxidation. The combination of these two functions gives the organotin mercaptides exceptional thermo-Stabilizing properties which are not exceeded by any other class of stabilizers.
Sulphur-containing organotin stabilizers be used in all types of PVC processing where very high thermostability is required.
One of the most appreciated properties of the whole group of organotin stabilizers is the absolute crystal clarity of finished articles, an advantage in the manufacture of rigid PVC packaging and overhead-transparency film, bottles and containers. Thiotins are used also in the manufacture of plasticized PVC hoses, profiles, sheets, and transparent top coats of coated articles.
Sulphur-containing organotin stabilizers are not, in general, self-lubricating. Therefore, the high processing temperatures which are necessary for optimum transparency may cause adhesion of the hot melt to metal surfaces of the processing machine, if this is not prevented by the addition of suitable lubricants.
Organotin stabilizers lower the melt viscosity of rigid PVC, the addition of high-polymeric processing aids based on PMMA is advantageous in order to impart better flow properties and to improve surface quality of finished articles, e.g.in calendering of films, extrusion of profiles and sheets, blowing of bottles and in the injection moulding of fittings.
A special field of application for sulphur-containing organotin stabilizers is the production of foamed rigid PVC profiles.

PSTAB2301,PSTAB2303 & PSTAB2304 all have excellent early colour characteristics with quite good long term stability. P2302 has the highest long term stability with good early characteristics. P2303 & P2304 are both cost effective grades.