What is arsenic trioxide? Commonly known as arsenic, molecular formula As2O3, it is the most commercially valuable arsenic compound and the main arsenic chemical starting material. It is also one of the oldest poisons. It is odorless and tasteless. The appearance is white frosty powder, so it is called arsenic. This is a highly toxic by-product of the processing of certain specified minerals, such as gold mining, high temperature distillation of arsenopyrite (arsenopyrite) and condensation of China RG6 75 Ohm Coaxial Cable suppliers its white fumes.
Qualified antimony trioxide needs to be continuously calcined and purified from raw ore. Antimony trioxide is obtained by calcining and oxidizing Sb2O3 from stibnite (Sb2O3), purifying to remove arsenic and iron, and then reducing it with carbon. Metal antimony is further smelted and purified, and then oxidized to obtain pure Sb2O3. Antimony and arsenic are brother minerals, so repeated purification is required to remove arsenic. At present, antimony trioxide with relatively high purity in my country requires the arsenic content to be controlled to be less than 300ppm. However, in order to save labor costs, the arsenic content of antimony trioxide produced by some raw material factories does not meet the standard.
At present, the price of qualified antimony trioxide on the market in my country is about 55,000 yuan/ton, while the so-called antimony trioxide that has not been purified is only 15,000 yuan/ton, and the price difference is nearly four times. Such a huge price difference also makes some small wire and cable manufacturers who are short of funds choose to buy unqualified raw materials, which is also the reason why these unqualified products are always produced by people, and there is a market when there is demand.
If the cable manufacturer does not have enough strength and testing equipment and strict incoming inspection process, or it is also for more profit, receive such raw materials. Arsenic trioxide not only affects the performance of the cable itself, but itself is a highly toxic substance, which has long been banned by REACH. If such toxic raw materials are used to produce wires and cables, unqualified wire and cable products will be to injury and safety hazards.
If you look at wires and cables, most of them are black, and they are all one kind of sheath color and think there is no difference. In fact, this is not the case, and the black sheath material is also different. Today, I will introduce some black sheath materials, which are good materials and which are poor materials.
A sheath material flame retardant polyvinyl chloride and flame retardant polyethylene material. Antimony trioxide in this material is a very efficient flame retardant, because it has a good flame retardant synergistic effect with halogen, which can improve the oxygen index of the material and the self-extinguishing performance of the material from fire.
However, many material manufacturers use low-cost and inferior antimony trioxide containing "arsenic trioxide, commonly known as arsenic" to deceive many optoelectronic cable factories. Antimony trioxide is calcined and oxidized by stibnite (Sb2O3) to produce Sb2O3, purified to remove arsenic and iron, and then reduced to metal antimony with carbon, further smelted and purified, and then oxidized to obtain pure Sb2O3. Antimony and arsenic are brother minerals. Therefore, repeated purification is required to remove arsenic. Arsenic trioxide, which has not been fully purified, has long been banned by REACH, so it is cheap and toxic, but it is still used by many material manufacturers. It is recommended that when purchasing wire and cable products, you must choose a wire and cable manufacturer with complete qualifications.
