What does Level 4 reactive hazards indicate?
Reactivity. ◆ Level 4 – Materials that are easily capable of explosive decomposition at normal temperatures and pressure. ◆ Level 3 – Materials that are easily capable of explosive decomposition, but require an ignition source or will react explosively with water.
What does 4 represent in the NFPA 704 Diamond?
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. Acute hazards are more typical for emergency response applications.
What are the 4 categories of identification for NFPA diamonds?
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).
What do NFPA 704 symbols tell you?
National Fire Protection Association (NFPA) 704 (Standard System for the Identification of the Hazards of Materials for Emergency Response) is a simple, readily recognized system used for identifying the hazards of materials and the severity of those hazards.
What do each of the NFPA 704 fire diamond’s flammability ratings 0 4 mean?
1-Ignites after considerable preheating. 2-Ignites if moderately heated. 3-Can be ignited at all normal temperatures. 4-Very flammable gases or very volatile flammable liquids.
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.
How do you classify a hazard?
A common way to classify hazards is by category:
- biological – bacteria, viruses, insects, plants, birds, animals, and humans, etc.,
- chemical – depends on the physical, chemical and toxic properties of the chemical,
- ergonomic – repetitive movements, improper set up of workstation, etc.,
Should lab windows be open?
Doors, Windows, and Walls. Walls should be finished with material that is easy to clean and maintain. Doors should open in the direction of egress. Laboratories should not have operable windows, particularly if there are chemical hoods or other local ventilation systems in the lab.
How do you read a NFPA code?
The red-colored section of the NFPA Diamond is located at the top or twelve o’clock position of the symbol and denotes a material’s flammability and susceptibility to catching fire when exposed to heat. Flammability is graded on a 0 to 4 scale, and a lower rating is safer.