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Skull and Crossbones

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Symbol of skull and crossbones in red diamond-shaped warning borderThis is the symbol that will appear on the most severely toxic chemicals. Depending on the toxicity of the chemical, the skull and crossbones indicates that the chemical may be toxic or fatal. Specifically it can mean:

 


This chart summarizes the hazard criteria for the category(s) in each class for the skull and crossbones pictogram to appear on a pesticide product label. It also lists the corresponding hazard statement and signal word that will accompany the pictogram. This information is for illustrative purposes only; please consult the official GHS text Exit EPA disclaimer for complete information.

Hazard Class/ Category

Criteria

Hazard Communication Elements

Acute Toxicity

Category
1

LD50 ≤ 5 mg/kg bodyweight (oral)

LD50 ≤50 mg/kg bodyweight (skin/dermal)

LC50 ≤100 ppm (gas)

LC50 ≤0.5 (mg/l) (vapour)

LC50 ≤0.05 (mg/l) (dust, mist)

Symbol

Symbol of skull and crossbones indicates that the chemical may be toxic or fatal

 

Signal Word

Danger

Hazard Statement

Fatal if swallowed
(oral)

Fatal in contact with skin
(dermal)

Fatal if inhaled
(gas, vapour, dust, mist)

Acute Toxicity

Category
2

LD50 between 5 and less than 50 mg/kg bodyweight (oral)

LD50 between 50 and less than 200 mg/kg
bodyweight (skin/dermal)

LC50 between 100 and less than 500 ppm (gas)

LC50 between 0.5 and less than 2.0 (mg/l) (vapour)

LC50 between 0.05 and less than 0.5 (mg/l)
(dust, mist)

Symbol

Symbol of skull and crossbones indicates that the chemical may be toxic or fatal

Signal Word

Danger

Hazard Statement

Fatal if swallowed
(oral)

Fatal in contact with skin
(dermal)

Fatal if inhaled
(gas, vapour, dust, mist)

Acute Toxicity

Category
3

LD50 between 50 and less than 300 mg/kg
bodyweight (oral)

LD50 between 200 and less than 1000 mg/kg
bodyweight (skin/dermal)

LC50 between 500 and less than 2500 ppm (gas)

LC50 between 2.0 and less than 10.0 (mg/l) (vapour)

LC50 between 0.5 and less than 1.0 (mg/l)
(dust, mist)

 

Symbol

Symbol of skull and crossbones indicates that the chemical may be toxic or fatal

 

Signal Word

Danger

Hazard Statement

Toxic if swallowed
(oral)

Toxic in contact with skin
(dermal)

Toxic if inhaled
(gas, vapour, dust, mist)

 

 

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