W – The W symbol indicates that the chemical being labeled has a strong reaction to water. Chemicals like potassium, magnesium, rubidium, and cesium that will explode, burn, or give off dangerous gases when exposed to water have this symbol.
What does W mean in NFPA?
When a compound is both water-reactive and an oxidizer, the W/bar symbol should go in this quadrant and the OX warning is placed immediately below the NFPA diamond. Some organizations use other symbols, abbreviations, and words in the white Special Hazards section.
What does the crossed out W mean in this NFPA label?
The white diamond uses different symbols to indicate different special hazards. The diamond can include: A strike-out W (W), for when the chemical reacts with water. OX, for when the chemical is an oxidizer.
What do the colors on the NFPA mean?
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 is indicated by the NFPA symbol?
The National Fire Protection Association has developed a rating system to identify and rank hazards of a material. You’ve probably seen the colorful labels used to communicate these hazards. The label is diamond-shaped, made up of four smaller diamonds, one each blue, red, yellow, and white.
How do you read hazard diamonds?
Within the diamond is a number (with the exception of the white diamond). The number corresponds to the level of danger a chemical poses. The lower the number, the lower the hazard. The numbers range from zero to four, with zero representing no hazard at all, and four representing an extreme hazard.
What do the numbers mean on hazard signs?
The four bars are color coded, using the modern color bar symbols with blue indicating the level of health hazard, red for flammability, orange for a physical hazard, and white for Personal Protection. The number ratings range from 0-4.
What does a crossed out w mean?
It means that the hobos are not allowed to drink whiskey in that area. [;)]
What does the W with the line through it mean?
The won sign, ₩, is a currency symbol. It represents the South Korean won, the North Korean won and, unofficially, the old Korean won.
What does Special hazard W mean?
The special. hazards in use include W, OX and SA. W, indicates unusual reactivity with water and is a caution about the. use of water in either firefighting or spill control response.
What color represents instability hazards of the NFPA diamond?
Instability, or reactivity, is shown in the yellow area. This part of the color code is for materials that could be unstable during an emergency situation. Instability can vary from minor chemical changes to explosive reactions. The last section of the NFPA color code is white.
What are the OSHA safety colors?
The color of safety
- Red: Fire protection equipment. Danger, high risk of injury or death. …
- Orange: Moderate risk of injury. Guarding devices.
- Yellow: Caution statements. Minor risk of injury. …
- Green: Safety equipment or information. …
- Blue: No immediate hazard.
- Red – combustible materials.
- Yellow – oxidizers.
- White – poison or toxic.
What does the color white within a diamond mean?
Fire diamonds located on tanks and buildings indicate the level of chemical hazard located there. The four colors are blue, red, yellow, and white. … The white indicates special precautions, usually used for oxy, or oxidizing agent.
Which NFPA symbol indicates the lowest risk?
NFPA Rating Criteria and NFPA Labels
0 represents the least hazardous while 4 represent the most hazardous.
What does the HMIS rating mean?
The Hazardous Materials Identification System (HMIS) is a hazard rating system that uses color bar labels to identify and provide information about chemical hazards. It was developed by, and is proprietary to the National Paint Coatings Association (NPCA), now known as the American Coatings Association (ACA).
What is SA on NFPA 704?
The NFPA 704 standard of the National Fire Code provides a simple system for identifying hazards associated with various materials in case of a fire, spill or other emergency. This surface-mount NFPA diamond with 3-0-0-SA rating will help alert emergency responders to potential danger.