In 2012, OSHA revised its hazard communication standard (29 CFR 1910.1200) to align with the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) standards for classifying and communicating chemical hazard information.
The changes include new required pictograms for chemical labels. Each pictogram consists of a symbol on a white background framed within a red border and represents a distinct hazard(s).
Here's a look at the nine pictograms.
Health Hazard

Carcinogen
Mutagenicity
Reproductive Toxicity
Respiratory Sensitizer
Target Organ Toxicity
Aspiration Toxicity
Flame

Flammables
Pyrophorics
Self-Heating
Emits Flammable Gas
Self-Reactives
Organic Peroxides
Exclamation Mark

Irritant (skin and eye)
Skin Sensitizer
Acute Toxicity
Narcotic Effects
Respiratory Tract Irritant
Hazardous to Ozone Layer (Non-Mandatory)
Gas Cylinder

Gases Under Pressure
Corrosion

Skin Corrosion/Burns
Eye Damage
Corrosive to Metals
Exploding Bomb

Explosives
Self-Reactives
Organic Peroxides
Flame Over Circle

Oxidizers
Environment

(Non-Mandatory)
Aquatic Toxicity
Skull and Crossbones

Acute Toxicity (fatal or toxic)