Hazard signs are specially designed international symbols used to warn about dangerous materials.
The symbols listed below are used for visual identification during the transportation of chemical materials.
Many countries require such signs to be present on vehicles or transport containers carrying dangerous goods.
Hazard Signs Used in the...
Fluorides are the general name for compounds of fluorine (F) with other elements of the periodic table.
It does not form compounds with Neon (Ne) or with Helium (He).
Fluorine Compounds Are Divided Into:
- simple — formed by two elements (also called binary compounds);
- oxyfluorides;
- hydrofluorides — a metal salt of hydrofluoric acid;
-...
Fluorine Compounds in Raw Material Processing:
In the recent past, Fluorine compounds (Fluorides) were used mainly in the nuclear industry for producing uranium fluoride compounds (hexafluoride).
Now, most fluoride compounds are used to produce fluoropolymers.
Such production must necessarily have a closed cycle for the use of fluorine-containing...
A corrosion inhibitor is a substance that reduces the corrosion of a material (metals and their alloys) upon contact with the environment.
Inhibitors can be organic or inorganic.
Organic inhibitors form a protective coating on the surface of metals that prevents the metal from reacting with an aggressive environment. The most effective are those...
Anti-Freeze Additives for Concrete
If concrete freezes, ice crystals, because of their expansion, destroy (tear apart) the structure of the concrete, and the resulting product afterward has extremely low strength and worsened other characteristics.
To solve this problem, you can use:
- heating the structure until the mix has set;
- adding special...
A herbicide is a substance (preparation) used to control weeds in agriculture.
Herbicides can be divided by the nature of their action into Selective (affecting certain plants, called selectives) and Non-selective/total (affecting all plants).
There are also contact-action herbicides (affecting only the point of contact) and systemic ones...
A fungicide is a preparation for treating plants and seeds to destroy and prevent fungal diseases.
The mechanism of action of these inhibiting substances has been practically unstudied, and modern science has only a general understanding of it.
Fungicides can be divided into organic (biological) and inorganic (chemical compounds).
By type of...
An antiseptic is a chemical material that prevents wooden products from rotting.
Protective Functions of Antiseptics:
Protect against fungi,
Protect against external atmospheric exposure,
Be resistant to atmospheric influence (not leach out),
Not discolor the wood,
Be safe.
Mineral Antiseptics:
Sodium fluoride — the most widely used...
Overview Article on the Production of Caustic Soda
In Russian industry, liquid and solid Caustic soda are distinguished.
By grade, Caustic soda can be classified as:
Granulated, grade GR (not less than 99.5%) see quality indicators
Flaked, grade TR (not less than 98.5%) see quality indicators
Liquid — solution grades RR and RD.
...
Chemical Materials Used in Agriculture Are Divided Into:
Pesticides — any materials used to destroy pests.
Fertilizers — chemical materials that help plants grow and feed them.
Feed additives — components of feed mixtures in animal husbandry.
Pesticides.
There has recently been an environmental breakthrough in this area —...
