What does the W with a line through it mean NFPA?

Only W with a line thru (water reactivity), OX (oxidizers) and SA (simple asphyxiant gases) are officially part of the NFPA 704 2012 standard. 8.2 Symbols. Special hazards shall be represented by a spatial arrangement denoted by symbols always at the six o’clock position.

What does the crossed out W mean in this NFPA label?

A strike-out W (W), for when the chemical reacts with water. OX, for when the chemical is an oxidizer. COR, for when the chemical is corrosive.

How do I read my NFPA hazard code?

Codes. The four divisions are typically color-coded with red on top indicating flammability, blue on the left indicating level of health hazard, yellow on the right for chemical reactivity, and white containing codes for special hazards.

What do NFPA 704 symbols tell you?

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 Level 4 flammability hazards indicate?

Risk level 4: Very flammable gases or very volatile flammable liquids. Shut off flow and keep cooling water streams on exposed tanks or containers. Risk level 3: Materials that can be ignited under almost all normal temperature conditions. Water may be ineffective because of the low flash point.

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Which are the four major areas covered by the standard hazard classification?

the physical and health hazards posed by the chemical; environmental health hazards; protective measures; and. safety precautions for handling, storing and transporting the chemical.

What does the letter W with a line through it represent on a NFPA 704 label?

Hazard Category: SPECIAL HAZARDS (White)

Only W with a line thru (water reactivity), OX (oxidizers) and SA (simple asphyxiant gases) are officially part of the NFPA 704 2012 standard.

What do the numbers mean on hazard signs?

The numbers superimposed over the colors rank the severity or danger, ranging from one to four, with four being the highest rating. The blue indicates potential health effects. A four in the blue means severe and immediate health effects, including death, and a one time exposure can cause lasting health problems.

What are the 9 DOT hazard classes?

A visor card guide for state and local law enforcement officials illustrating vehicle placarding and signage for the following nine classes of hazardous materials: 1) Explosives, 2) Gases, 3) Flammable Liquid and Combustible Liquid, 4) Flammable Solid, Spontanaeously Combustible and Dangerous When Wet 5) Oxidizer and …

What information does a hazard warning label always show?

The HCS requires chemical manufacturers, importers, or distributors to ensure that each container of hazardous chemicals leaving the workplace is labeled, tagged or marked with the following information: product identifier; signal word; hazard statement(s); precautionary 1 Page 2 2 statement(s); and pictogram(s); and …

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