Antimony

Antimony :

Antimony si a semimetallic chemical element which can exist in two forms: the metallic form is bright, silvery, hard and brittle; the non metallic form is a grey powder. Antimony is a poor conductor of heat and electricity, it is stable in dry air and is not attacked by dilute acids or alkalis. Antimony and some of its alloys expand on cooling.

Antimony has been known since ancient times. It is sometimes found free in nature, but is usually obtained from the ores stibnite (Sb2S3) and valentinite (Sb2O3). Nicolas Lémery, a French chemist, was the first person to scientifically study antimony and its compounds. He published his findings in 1707. Antimony makes up about 0.00002% of the earth's crust.

Applications :

Very pure antimony is used to make certain types of semiconductor devices, such as diodes and infrared detectors. Antimony is alloyed with lead to increase lead's durability. Antimony alloys are also used in batteries, low friction metals, type metal and cable sheathing, among other products. Antimony compounds are used to make flame-proofing materials, paints, ceramic enamels, glass and pottery. The ancient Egyptians used antimony, in the form of stibnite, for black eye make-up.

Siman Ltd has started its activities in 1994 as a company for trade and distribution of chemical products. For this period we have been able to establish close collaboration and relationship with our customers and suppliers. While constantly trying to determinate and even predict the actual needs of our partners, we have ever been able to expand the list of the products we are supplying and to improve our service. As an end result of this consequent striving for perfectness we have implemented the system for quality management –ISO 9001:2008, which simply serves to one more time prove our commitment to maintain our highly professional level of customer service.

The main activity of Siman Ltd is trading with chemical products, non ferrous metals and fertilizers over the territory of Bulgaria and worldwide. We have well established partnership network in more than 30 countries around the globe. It’s exactly these relationships that make our main capital, capital that we count on.