Danger diamond

The NFPA code is represented in a diamond containing 4 sectors, respectively toxicity, inflammability, reactivity and special risks . A coloured code that will appear on glass labels, at the back of transport vehicles, room doors etc enables the danger to be better noted. It is used by American companies although some French companies have also adopted it and it appears to be an efficient device. 

Committee of Experts has been allocated a unique four-digit number, called the Substance UN Number (or simply the UN Number). Thus a hazardous substance can be distinctly identified by the Substance UN Number (also called the Substance Identification Number or SIN). UN Serial number 0001 to 1000 are reserved for Class 1 items, that is, explosives and ammunition. The nine classes of dangerous goods and hazardous chemicals with a distinctive diamond shaped label bearing a pictorial diagram for quick hazard recognition are ... 

The theory guesses researches of synthesis of diamond, as in a solid phase at q up to 60 Kbar and simultaneous operating of temperature t=2000° C, and in a gas phase at q = 45 Kbar and t=1650° C. However, for the explorers the essential concern introduced synthesis of diamond of water alone in medium of gas in chambers of die large size with die purpose of maximum growth of diamond. In this connection at die end of 60 years XX of century an item some experimenters become to create gas sources of super-high pressure (16. .. 30 Kbar), die activity with which one has appeared by extremely composite and dangerous (both explosion-dangerous, and pursued by the monopolists). 

Of particular importance to laboratories are diamond safety signs, prohibitive signs, and triangle danger signs. Each sign encloses a descriptive picture. 

Worker safety, according to recent social science research, is apparently enhanced by labeling only for major hazards and by establishing a general danger symbol, perhaps patterned on NFPA s 704 System or the DOT/UN Hazard Diamond Labels, l ile detailed labels do increase the amount of information available, they also raise anxiety levels and probably reduce reader retention and understemding. 

Danger always appears with a combination of white, red and black on an oval shape Warning is used with a combination of orange and black on a truncated diamond and Caution always appears on a rounded-comer rectangle, colored yellow and black. 

Lead-oxide electrodes react in a comparable way, and they also show a high overpotential for oxygen production. In the Uterature, the use of lead-oxide electrodes for the applications discussed is common, due to their instability as cathodes and the danger of releasing lead molecules. In modem production units they have been replaced by boron-doped diamond electrodes. 

Diamonds can now be synthesized to weigh more than 0.6 g [3 carats (ct)]. This is an art for the color and clarity. The production of gem quality synthetic diamonds (Section 29.14) results in a deep yellow color. Colored diamonds tend to be more valuable than colorless ones simply because they are more rare. The Dresden Green diamond weighs 40.70 ct and is the largest known green diamond in the world. Natural red, pink, and yellow diamonds can also command prices of near 1M per ct. The danger is that diamonds can also be artificially colored by irradiating them diamond was perhaps the first irradiated gem. Blue B-doped diamond is a semiconductor while blue... 

The fire diamond has four color-coded sections, as illustrated in Figure 4.2. The blue, red, and yellow fields correspond to chemical s effect on health, flammability, and reactivity, respectively. They all use a numbering scale ranging from 0 to 4. A value of 0 means that the material poses essentially no hazard a rating of 4 indicates extreme danger. Table 4.3 provides further description of the numbering system for the first three fields. 

Part III of Annex A is a listing of appendices. The most relevant of these are A. 5, general packing requirements, A.6, general conditions for the use of intermediate bulk containers (IBCs), both of which are based on the UN recommendations, and Appendix A.9, labelling requirements. The diamond shaped danger labels specified in Appendix A.9 are applied to both the package and the transport vehicle. These labels provide an instant indication of the classification of material carried and therefore an indication of the risk. All the labels used in ADR are displayed in Plate 1 (see Colour Section). 

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