Which section of an NFPA 704 label indicates health hazards?
The system uses a color-coded diamond with four quadrants in which numbers are used in the upper three quadrants to signal the degree of health hazard (blue), flammability hazard (red), and reactivity hazard (yellow). The bottom quadrant is used to indicate special hazards.
Which NFPA Health rating indicates very short exposure could cause death or major residual injury?
Health Hazard 4
Blue: Health Hazard 4 – Materials with an oral LD50 of less than or equal to 5 mg/kg – Material that on very short exposure could cause death or major residual injury. Example: hydrogen cyanide.
What is the highest rating for toxic chemicals on an NFPA diamond?
NFPA Rating Criteria and NFPA Labels A number rating system of 0-4 is provided to rate each of the four hazards and is placed on a placard. 0 represents the least hazardous while 4 represent the most hazardous.
What are the health effect caused by acute exposure of methyl isocyanate MIC )?
Health Effects. Methyl isocyanate is irritating and corrosive to the eyes, respiratory tract, and skin. Acute exposure to high vapor concentrations may cause severe pulmonary edema and injury to the alveolar walls of the lung, severe corneal damage, and death.
What does NFPA 704 apply to?
The NFPA 704 standard is widely used and recognized by fire and emergency responders and safety personnel for identifying the hazards of short term/acute exposure to materials under conditions of fire, spill, or similar emergencies.
What does the NFPA 704 diamond placard indicate?
A four section multicolor “square-on-point” (diamond/placard) is used to address the health, flammability, instability and special hazards presented by short-term, acute exposures that could occur during fires, spills or other similar emergencies.
What number represents the highest level of danger an NFPA 704 hazard?
Number System: NFPA Rating and OSHA’s Classification System 0-4 0-least hazardous 4-most hazardous 1-4 1-most severe hazard 4-least severe hazard • The Hazard category numbers are NOT required to be on labels but are required on SDSs in Section 2.
What does NFPA 704 stand for?
“NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response” is a standard maintained by the U.S.-based National Fire Protection Association.
How is methyl isocyanate treated?
Treatment of illness: There is no specific treatment for methyl isocyanate poisoning. Supportive care (intravenous fluids, medicine to control pain) is the standard treatment.
How is methyl isocyanate harmful to the human body?
A concentration of 2 ppm has been reported toxic in humans. Methyl isocyanate attacks the respiratory system, eyes and skin. It can injure the lungs and bronchial airways, cause permanent eye damage, and death.
When do you need to use NFPA 704 diamond?
NFPA 704 does not specify when a container, tank or facility must label with the 704 diamond. It tells you HOW to label when another code, standard or an AHJ (Authority Having Jurisdiction, such as the local fire department) requires such labeling.
What is the flash point of methyl isocyanate?
A colorless low-boiling liquid (b.p. 39°C) that is denser than water. Flash point is less than 20° F. Very toxic by inhalation. Can be absorbed through the skin. Has a sharp odor, but the sense of smell cannot be relied upon to warn of the presence of vapors at low concentrations.
What is the CAS number for methyl isocyanate?
Common Name: METHYL ISOCYANATE. CAS Number: 624-83-9 DOT Number: UN 2480 (PIH) ————————————————————————-. HAZARD SUMMARY. * Methyl Isocyanate can affect you when breathed in and by passing through your skin. * Methyl Isocyanate may cause mutations.