GHS vs. NFPA Hazard IdentificationNumbering Systems are

Reversed!

GHS & NFPA Comparison

GHS : Higher Risk = Lower Number

1 – extremely hazardous2 – highly hazardous3 – hazardous4 – will be harmful5 – may be harmful

4 – extremely hazardous 3 – highly hazardous 2 – hazardous 1 – harmful 0 – no risk

NFPA : Higher Risk = Higher Number

NFPA Diamond

Health Hazard -4 – deadly3 – extreme danger2 – hazardous 1 – slightly hazardous0 – no hazard

Fire Hazard -4 – below 73 Fo

3 – below 100 Fo

2 – below 200 Fo

1 – above 200 Fo

0 – will not burn

Reactivity -4 – may detonate3 – may detonate with

shock and heat2 – violent chemical

change at high temps or pressures

1 – unstable if heated0 – stable

Specific Hazard –OXY – oxidizerACID – acidALK – alkalineCOR – corrosiveW – water reactive

– radiation hazard

NFPA Diamond

NOTE: For firefighters, so focus is on behavior at high temps – not necessarily lab work.

GHS Pictograms and Categories

•flammable•pyrophorics•self-heating•emits flammable gas•self-reactives and organic peroxidesTypes B, C, D, E, & F

•oxidizers • explosives• self-reactives and

organic peroxidesTypes A & B

GHS Pictograms and Categories

•irritant (skin & eye)•skin sensitizer•acute toxicity (harmful)•narcotic effects•respiratory tract irritant•hazardous to ozone layer

•acute toxicity (fatal or harmful)

• carcinogens• mutagenicity• reproductive toxicity• respiratory sensitizer• target organ toxicity• aspiration toxicity

GHS Pictograms and Categories

•corrosive to skin•corrosive to metals•may cause eye damage

•gas under pressure • aquatic toxicity

More Info on GHS Categories

Sigma Aldrich Summary of the GHS System of Labeling

OSHA Health Hazard Criteria

OSHA Physical Hazard Criteria