Purple K Dry Chemical
(Fire Extinguishing Agent - Pressurized
and Non-pressurized)
Revision Date: April 10, 2015 Page 7 of 10
TOXICOLOGICAL INFORMATION
Oral LD50 (Rat) >2000 mg/kg
Amorphous Silica:
Oral LD50 (Rat) >5000 mg/kg
Dermal LD50 (Rabbit) >2000mg/kg
Dye:
Oral LD50 (Rat) >2000 mg/kg (no deaths)
Clay:
Oral LD50 (Rat) >5000 mg/kg
Dermal LD50 (Rabbit) >5000mg/kg
Nitrogen
Simple asphyxiant
Carbon Dioxide
Simple asphyxiant
LCLo (inhalation in humans): 90,000ppm/ 5 minutes.
Specific Target Organ Toxicity (STOT) – single exposure
Potassium Bicarbonate: Available data indicates this component is not expected to cause target organ
effects after a single exposure.
Calcium Carbonate: Available data indicates this component is not expected to cause target organ effects
after a single exposure.
Nitrogen and Carbon Dioxide: Exposure to nitrogen and carbon dioxide gas at high concentrations can
cause suffocation by reducing oxygen available for breathing. Breathing very high concentrations can
cause dizziness, shortness of breath, unconsciousness or asphyxiation.
Specific Target Organ Toxicity (STOT) – repeat exposure
Potassium Bicarbonate: Available data indicates this component is not expected to cause target organ
effects after repeat exposure.
Calcium Carbonate: Available data indicates this component is not expected to cause target organ effects
after repeat exposure.
Serious Eye damage/Irritation
Potassium Bicarbonate: Not irritating (rabbit)
Calcium Carbonate: Not irritating (rabbit)
Mica: Not irritating (rabbit)
Skin Corrosion/Irritation
Potassium Bicarbonate: Not irritating (rabbit)
Calcium Carbonate: Not irritating (rabbit)
Mica: Not irritating (rabbit)
Respiratory or Skin Sensitization
Potassium Bicarbonate: Not a dermal sensitizer in guinea pig test.
Calcium Carbonate: Non-sensitizing to skin in Mouse local lymph node assay.
Calcium carbonate and mica may contain small quantities of quartz (crystalline silica) as an impurity.
Prolonged exposure to respirable crystalline silica dust at concentrations exceeding the occupational
exposure limits may increase the risk of developing a disabling lung disease known as silicosis. IARC has
classified Silica Dust, Crystalline, in the form of quartz or cristobalite as 1 (carcinogenic to humans).
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