For chemical synthesis companies, hazardous chemicals are not rare to see. The rational storage and handling of hazardous chemicals is the key to the safety of laboratory chemistry experimenters and workers and requires great attention.
Before we move to the storage and handling, let’s first know their classification.
Classification of hazardous chemicals
1. Explosive and unstable substances. Such as concentrated hydrogen peroxide, organic peroxide, and so on.
2. Oxidizing substances. Such as oxidizing acid, hydrogen peroxide also belongs to this category.
3. Flammable substances. In addition to flammable gases, liquids, and solids, it also includes substances that produce combustibles in moisture. Such as alkali metal hydrides, calcium carbide, and substances that ignite spontaneously in contact with air such as white phosphorus.
4. Toxic substances.
5. Corrosive substances. Such as acid, alkali, etc.
6. Radioactive substances.
The storage and handling of hazardous chemicals (here we take the hazardous reagents and solutions as the example) have rules and regulations, and everyone must strictly abide by these rules to ensure safety. What are the rules of storage and handling of chemical reagents and solutions in laboratories then?
Storage and handling of hazardous chemicals:
1. Flammable and explosive reagents should be stored in an iron cabinet (with a wall thickness of 1mm or more), with vents on the top of the cabinet. It is strictly prohibited to store flammable liquids in bottles larger than 20L in the laboratory. Do not put flammable and explosive drugs in the refrigerator (except for explosion-proof cabinet refrigerators).
2. The rules of storage of reagents in the laboratory require that incompatible compounds (Two 3.or more compounds that can react violently, burn, explode, and emit toxic gases after being mixed or contacted) cannot be mixed. Such compounds are mostly strong oxidizing substances and reducing substances.
3. The rules of storage of reagents in the laboratory require that corrosive reagents should be placed in plastic or enamel trays or barrels to prevent accidents caused by bottle rupture.
4. Pay attention to the storage period of the hazardous chemicals. Some reagents will gradually deteriorate during storage and even cause harm.
5. Keep the medicine cabinet and reagent solution away from direct sunlight or close to heat sources. Reagents that require protection from light should be packed in brown bottles or wrapped in black paper or cloth and stored in a dark cabinet.
6. If the label on the bottle of the hazardous chemicals has fallen off or is about to be blurred, it should be attached immediately. Reagents without labels or unidentifiable labels must be treated as dangerous goods after re-identification, and should not be littered freely to avoid serious consequences.
7. The storage and handling of chemical reagents and solutions in laboratories require that the chemical reagents should be rightly positioned and placed, reset after use, etc., but the excess chemical reagents are not allowed to be poured back into the original bottle.