Is the PVC water pipe poisonous?

Is the PVC water pipe poisonous?

The staff of the National Plastic Products Quality Supervision and Inspection Center said that users who use PVC water pipes in China are still more common. PVC water pipes and PVC cling film have nothing to do with them. They are qualified for the inspection of PVC water pipes. There is no toxic phenomenon of water pipes. Residents can use PVC pipes with confidence. However, some experts said that PVC pipes are not necessarily all toxic. The qualified PVC itself is safe and non-toxic, and has the advantages of energy saving, impact strength, chemical corrosion resistance and flame retardancy, which can be reduced to minus 30 degrees Celsius. It is recommended for use by the Ministry of Construction in the temperature environment of 70 degrees Celsius.

PVC will be added to the stabilizer during production, but the stabilizer is non-toxic and toxic. Only when a toxic stabilizer such as lead salt is added will it cause hidden dangers. However, PVC products are mixed, and some small enterprises use lead salts as stabilizers, and it is difficult to meet relevant health standards. When consumers choose PVC materials, it is best to purchase them in the building materials market with formal and credible quality assurance, and require suppliers to issue inspection reports. Consumers should pay attention to check the relevant documents and signs, and obtain the products that are related to the Hygiene License for Drinking Water Hygiene and Safety Products.

Dicyandiamide.Calcium cyanamide can be used as a pesticide intermediate

For many years the most important commercial process was via heating dicyanodiamide ([dicy"), either with ammonia or on its own, under pressure. The [dicy" is prepared by heating cyanamide solution at 70–80 °C. The cyanamide itself is prepared from calcium cyanamide:
Heated [dicy" to just above its melting point (209 °C) results in a vigorous exothermic reaction, producing some melamine and ammonia together with a number of complex water-insoluble deammoniation products:
In order to achieve a high yield of melamine in the commercial process, the reaction is carried out in the presence of ammonia at about 300 °C under pressure.

Pesticide Intermediates

Pesticide Intermediates,Calcium Cyanamide Fertilizer,Granular Calcium Cyanamide,Ultra Micronized Dicyandiamide

NingXia Yuanda Xingbo chemical CO.,LTD , http://www.ydxbchem.com