Chemical and reagent

Chemical and reagent

Flammable chemicals: 

Acetone, Mentholated sprit xylene.

Safe storage:

  1. Keep only small amount of flammable chemical in and outside locked store room that is cool and well ventilated, including ventilation at or near floor level.
  2. Do not store flammable and oxidize chemicals.

Safe use:

  1. Keep the laboratory well ventilated to prevent any build up of flammable gases and vapors.
  2. Before opening a bottle always make sure that there is no flame within 2 meters of the bottle .
  3. Ensure stock bottles and dispensing containers of flammable liquids are tightly closed after use.
  4. If need to heat a flammable liquid use a water both.
  5. Use strong carriers fitted with handles when transport.
  6. Do not light a match or use a lighted taper near to flammable chemicals.

Control of fires:

-By dry powder chemical fire extinguisher.
-Fire blanket
-Dry sand
-Earth
Do not pour water on the flame because it spreads the fire.
Oxidizing chemicals: Ammonium nitrate, hydrogen peroxide , nitric acid, sodium nitrate, perrhloric acid , sodium chlorate, chromic acid, potassium dixhromate,potassium permanganate,
Safe storage: These can produce heat so they must be stored away from other chemicals with which they react dangerously .
Safe use: Always handle oxidizing chemicals with care. Most oxidizing substances. Are dangerous to skin and eyes.
Toxic , Harmful and Irritating chemicals: There chemicals can cause serious acute or chronic effects even death , e.g., potassium cyanide, mercury.

Harmful chemicals:

Barium chloride, benzoic acid, potassium oxalate, saponin xylene, iodine.

Irritating chemicals:

Ammonia solution , acetic acid, sulphosalicylic acid, potassium dichromate.

Safe storage:

Highly toxic substances must be kept in a locked cupboard, the others should be stored in a capboard not no and open shelves.

Safe use Irritating chemicals:

  1. Handle those substances with great care and wash hands immediately after use. Wear suitable protective .gloves and if indicated a face dust mask, eye shields, and a plastic protective apron.
  2. Ensure and eye wash bottle is in accessible to risen the eyes ..
  3. Whenever possible, handle chemicals (irritating harmful) in a fume cupboard or in well ventilated room.
  4. Before opening a chemical with an irritating vapor, place a cloth over the neck of the container and cap.
  5. Keep containers tightly closed.
  6. Never mouth pipette any chemical or reagent always use a pipette filter.

Corrosive chemicals of laboratory:

These include strong acids ,e.g. concentrated sulphuric acid, nitric acid ,hydrochloric acid.
Safe stroge: Stored at low level to prevent accidentally knocked off a shelf . Do not store potassium hydroxide , or sodium hydroxide in a bottle having a ground glass stopper because chemicals absorb carbodixide (CO2) from the air forming carbonated which can cement the stopper in the bottle.

Safe use Corrosive chemicals:

i.    Never attempt mouth –pipetteing.
ii.   Always pour a corrosive chemical at below eye level, slowly and with great care to avoid splashing.
iii. Wear protective eyeglasses and  a face visor or at least eye shields when handling the bottle.
iv.  Dissolve a solid corrosive with great care in water, never add water to acid .
v.   Ensure that chemicals do not spill on the balance pan or other metal pans.
vi.  Always use a strong carrier for transporting.

Explosive: Sodium azide , perchloric acid, picric acid and procreates ether.
Safe storage: always read carefully the manufacture’s instructions regarding the storage and handling.