CHEMICAL SAFETY

WHAT TO DO

Summary Slide

SAFETY FIRST– HANDLING CHEMICALS

SPLASHES INHALATION INGESTION BURNS

SAFETY FIRST

DO NOT SMOKE IN THE LAB

HANDLING CHEMICALS Hazard Symbols

These substances provide oxygen which allows other materials to burn more fiercely.

Oxidising

Highly flammable

These substances easily catch fire.

HANDLING CHEMICALS

These substances attack and destroy living tissues, including the eyes and skin.

Corrosive

Toxic

These substances can cause death. They may have their effects when swallowed or breathed in, or when absorbed through the skin. 

HANDLING CHEMICALS

These substances are not corrosive, but can cause reddening or blistering of the skin. Irritant

Harmful

These substances are similar to toxic substances but are less dangerous.

HANDLING CHEMICALS Oxidising

Concentrated nitric acid, HNO3

Potassium manganate(VII), KMnO4

Potassium dichromate(VI), K2Cr2O7

Highly flammable

Ethanol, C2H5OH Methanol, CH3OH

Potassium metal, K Sodium metal, Na

Lithium metal, Li Universal indicator

Magnesium metal, Mg

HANDLING CHEMICALS

Corrosiveconcentrated acids - Eg:- H2SO4, HCl, HNO3, H3PO4

concentrated alkalis - Eg:- KOH, NaOH, Ca(OH)2

concentrated hydrogen peroxide, H2O2

Potassium metal, K

Sodium metal, Na

Lithium metal, Li

Silver nitrate, AgNO3

Bromine, Br2

HANDLING CHEMICALS Toxic

Lead(II) chloride, PbCl2

Lead(II) nitrate, PbNO3

Methanol, CH3OH

Mercury, Hg

Potassium dichromate(VI), K2Cr2O7 Bromine gas, Br2

HANDLING CHEMICALS Irritant

Calcium chloride, CaCl2 Potassium iodide, KI

HarmfulCopper(I) oxide, Cu2O Iodine, I2

Copper(II) sulphate, CuSO4 Ethanol, C2H5OH

Copper(II) oxide, CuO

Iron(II) sulphate, FeSO4

Manganese(IV) oxide, MnO2

Potassium manganate(VII), KMnO4

HANDLING CHEMICALS

Always wear goggles when working

with chemicals

HANDLING CHEMICALS Always handle chemical with

spatulas or forceps.

HANDLING CHEMICALS Do

– Be tidy and organised

– Support glass equipment with stands

and clamps whenever necessary.

- ie to make sure apparatus is stable

– Keep the apparatus where it belongs

after use.

HANDLING CHEMICALS Do Not

– eat or drink in labs

– leave paper near a Bunsen flame

– point a test-tube towards another

person

– over-tighten bungs or corks

– heat up sealed apparatus

SPLASHES IN ON THE SKIN

Wash for 10 minutes Under gently running

water Until no chemicals

remain

Seek medical advice

SPLASHES IN ON THE SKIN

IF chemical is insoluble Use soap Under running water Until the chemical has

been removed Seek medical advice

SPLASHES IN ON THE SKIN

Remove all

contaminated clothing Taking care not to

spread the chemical

onto anything else Soak the clothes in

water

SPLASHES IN ON THE SKIN

Seek medical advice Take the chemical in a

bag Or in a bottle to the

medical centre

SPLASHES IN THE EYE

Wash for 15 mins Gently running water Use saline eye wash Hold the eye lid open Seek medical advice

INHALATION Remove person to the fresh air If unconscious

– Place in the recovery position

Seek medical advice

INGESTION

If swallowed Rinse mouth Spit out

– Do Not vomit Seek medical advice

BURNS

Wash gently with

water for 10 minutes To cool skin To remove all chemicals Seek medical advice