Providing total solutions for gas users

	Undetectable by human senses
	A pungent gas
	Stenched to make it smell
	A flammable gas
	Completely safe to humans

Sorry that was incorrect, oxygen is undetectable by human senses

That was correct, oxygen is undetectable by human senses

Oxygen is categorised as an oxidant and so is not flammable but it will readily support and accelerate combustion.

If the atmosphere is enriched with oxygen the likelihood and potential intensity of fires is increased. Sparks which would normally be regarded as harmless can cause fires and materials which do not burn in air, including fireproofing materials, may burn vigorously or even spontaneously in enriched air.

Smoking must, therefore, be prohibited in the vicinity of oxygen and suitable warning notices displayed.