hazchem signs, their classification and useage

Hazchem Class Help and Advice
Bookmark and Share
 Safety Signs Categories
Legally required products
Assembly Point signs
Awareness Posters
bespoke signs
Braille signs
Car park signs
Catering signs
Cautionary signs
Clearance signs
Construction signs
Durable Floor signs
Electrical Safety signs
Emergency Exit signs
Environmental signs
Fire Equipment signs
Fire Extinguishers
First Aid signs
First Aid Kits
General Office signs
Hazchem signs
HSE Books
ICE Warning Signs
Laboratory signs
Mandatory signs
Marine IMO signs
Prestige signs
Prohibition signs
Protective Clothing
Projecting Signs
Recycle signs
Road Traffic signs
Road Works signs
Road Works Barriers
Road Cone Signs
Safety Equipment
Safety Tape
Sign Frames
Signs for Schools
Smoking Legislation signs
Stanchion Signs
Toilet Signs
Vehicles signs
Other HSE Products
Retail / POS / Office
Shopping Cart
Safety Resources

Secure and Trusted Site
Health and safety signs
 
Hazchem Signs, Their Classes and Uses
Here are the 9 classes of hazardous categories and their subclasses explained

Related pages: hazchem Home page | Buy hazchem labels | Find info about hazardous substances | Information about Hazchem Classes

Class 1 Explosives
sub class symbol Description Examples
  These materials will explode Pyrotechnics
Fireworks
TNT
Nitro-glycerine

Class 2 Gases
sub class symbol Description Examples
2.1 Flammable Gases These are gases which will burn Propane
Butane
Acetylene
Hydrogen
LPG
Class 2.2
Non-flammable
Non-toxic gases
These gases are usually compressed and so are a source of stored energy and some may also present an anoxic hazard (that is, they will exclude oxygen and so kill through asphyxiation). These containers may rocket if valves are damaged or containers are involved in a fire. Oxygen Air
Carbon dioxide
Nitrogen
Class 2.3 Toxic Gas These gases are toxic. Being gases they will rapidly disperse if there is a leak. This may reduce the concentration and the hazard, but it will also spread the gas further, so increasing the risk of poisoning people. Chlorine
Methyl Bromide
Nitric Acid

Class 3 Flammable Liquids
sub class symbol Description Examples
  These liquids will burn. Petrol
Alcohol
Paraffin

Class 4 Flammable Solids
sub class symbol Description Examples
Class 4.1
Flammable solids
self- reactive and related substances and desensitised explosives
Solids easily ignited and readily combustible. These are ordinarily flammable solids which don't fit into Class 4.2 or 4.3 Sulphur
Phosphorus
Picric Acid
Class 4.2 Spontaneously combustible The materials will catch fire if exposed to air without any heat being applied (that is, the heat from the normal air is sufficient for them to catch fire - no other source of heat is required). Charcoal (non-activated)
Class 4.3 Dangerous when wet This class is also know as 'Emits flammable gases when wet'. This class has a particular hazard: not only can moisture from the air cause a fire, but if water or foam is used to extinguish them, it will make the situation worse. Calcium Carbide

Class 5 Oxidising substances
sub class symbol Description Examples
Class 5.1
Oxidising agent
These are all oxidising agents other than organic peroxides. When substances burn in air, they combine with oxygen and so are said to have been oxidised. Other chemicals have a similar 'burning' effect and so are said to be oxidising agents. The largest group of these are organic peroxides Chlorine
Calcium Hypochlorite
Sodium Peroxide
Class 5.2
Organic peroxides (liquid or solid)
These are a particular class of oxidising agent. They have all the normal hazards of oxidising agents (that is, they will cause a 'chemical burning'). In addition, they will often be explosive under certain conditions - especially, if they are allowed to dry out Benzoyl Peroxides
Methyl ethyl Ketone peroxides (MEKP)

Class 6 Poisonous & infectious substances
sub class symbol Description Examples
Class 6.1a Toxic These are liable to cause death or serious injury to human health if inhaled, swallowed or absorbed through the skin. They are covered by special regulations and need special recognition. Cyanides
Lead
Arsenic
Class 6.1b Harmful These materials which must be stored away from food stuffs but which are not classified as poisons. Pesticides
Heavy Metals
Class 6.2
Infectious Substances
Substances containing viable micro-organisms that may cause disease in humans or animals Diagnostic specimens or live vaccines

Class 7 Radioactive substances
sub class symbol Description Examples
  Materials or combinations of materials which spontaneously emit ionising radiation. Uranium
Radio Isotopes
Plutonium

Class 8 Corrosives
sub class symbol Description Examples
  These chemicals will eat away at a wide range of materials including some materials of construction for tanks and probably your eyes and skin. Care must be taken to ensure the containers and packages are made from the right materials and the chemicals do not contact your clothes, skin or eyes. Special protective equipment needs to be worn. Hydrochloric acid
Sodium Hypochlorite (liquid pool chlorine)
Sodium Hydroxide (caustic soda)

Class 9 Miscellaneous Goods
sub class symbol Description Examples
  Substances and articles which have potentially dangerous properties that are relatively minor, or are not covered by any of the classes already described Aerosols
Polyester beads

 

 


hazchem Signs health and safety signs

 

 

checkout view cart your previous orders login to see your previous orders