If 4 is written in a specific color on a chemical bottle, what it is meant?
Answer:
Depends what colour background:
Blue/health: Very short exposure could cause death or major residual injury
Red/flammability: Will rapidly or completely vaporize at normal atmospheric pressure and temperature, or is readily dispersed in air and will burn readily
Yellow/reactivity: Readily capable of detonation or explosive decomposition at normal temperatures and pressures
As you can see a 4 on any colour means a bad thing, take special care and follow safety guidelines.
4- in the diamond is never a good sign.
A chemical hazard label is a pictogram applied to containers of dangerous chemical compounds to indicate the specific risk, and thus the required precautions. There are several systems of labels.
The U.S.-based National Fire Protection Association (NFPA) has a standard NFPA 704 using a diamond with four colored sections each with a number indicating severity 0-4 (0 for no hazard, 4 indicates a severe hazard). The red section denotes flammability. Blue is health risks. Yellow is reactivity (tendency to explode). The white section denotes special hazard information. This label is used primarily in the USA.
The answers post by the user, for information only, FunQA.com does not guarantee the right.
More Questions and Answers: