Diamond blue white

The diamond label in Figure 1.13, called the National Fire Protection Agency (NFPA) diamond provides information at a glance and should be mounted on all containers. Each of the smaller diamonds within the larger one has a different color. The top diamond is red and gives flammability information. The left diamond is blue and tells to what extent the material is a health hazard. The right diamond is yellow and provides reactivity information. The bottom diamond is white and gives special information about the material. The numbers 1, 2, 3, and 4 are placed in the top three smaller diamonds to indicate the severity of the hazard, 1 the least hazardous and 4 the most hazardous. 

The purest diamonds are crystal clear and colourless. Such stones are described as of the first water or as blue-white s . Diamonds may be of any colour when ruby red they are almost priceless. There was a small ruby red one among the Russian Court Jewels many years ago. 

Spinel is a colorless magnesium aluminate (MgAl204) of cubic structure. It is hard and durable, but, like white sapphire, it is not a good diamond substitute because it has a low refractive index and lacks brilliance. However, it is readily doped to produce other gems of various colors. Artificial ruby, for example, is often natural red spinel, and most synthetic blue sapphires on the market are actually blue spinel. 

The system utilizes a diamond-shaped placard with four colored sections. Each section indicates a particular hazard the blue section indicates a health hazard the red section flammability and the yellow section reactivity. The white section contains special information, such as oxy for oxidizer, cor for corrosive, a W with a slash through it for water reactivity, and a radioactive propeller indicating radioactivity. Numbers 0 to 4 are placed in the blue, red, and yellow sections, indicating the degree of hazard. The numbers indicate the hazard from 0, which means no hazard, to 4, which indicates the most severe hazard. 

Fig. 12.28 Effect of laser irradiation on apparent temperature of the phytantriol + water matrix (Tapp) with change in GNR concentration. [GNR] = 0 nM are white symbols, 0.3 nM blue symbols, 1.5 nM yellow symbols, and 3 nM black symbols. Circles indicate v2 phase, triangles indicate v2 + H2, squares indicate H2 + L2, and diamonds indicate L2. The cartoon on the right indicates the type of phase structure present with increasing temperature. (Taken from [107])...

An example of an NFPA symbol is shown in Figure 2.6. There are four small diamonds, which together are assembled into a larger one. The four smaller diamonds are blue for health or toxicity, red for flammability, yellow for reactivity, and white for special warnings, such as... 

Section 16. Section 16 contains the National Fire Protection Association (NFPA) rating. This is similar to the Baker SAF-T-DATA (discussed in Section 3), except that the number represents the hazards when a fire is present. The order here is Health, Flammability, and Reactivity. Often, this is presented in graphic form on a label (see figure). The small diamonds are often color coded blue for Health, red for Flammability, and yellow for Reactivity. The bottom diamond (white) is sometimes used to display graphic symbols denoting imusual reactivity, hazards, or special precautions to be taken. 

Color-coded systems are used to label hazardous materials. Some labels use colored bars or diamonds that indicate the type of hazard. A red bar or diamond indicates a fire hazard. Yellow bars or diamonds indicate a reactivity hazard. Blue bars or diamonds indicate health hazards. White bars identify the need for personal protective equipment such as glasses, gloves, faceshields, rubber aprons, or respirators. A white diamond contains symbols regarding the health hazards the chemical may cause, warnings such as OX for oxidizer, ACID for acid, ALK for alkali, COR for corrosive, W for use no water, and a radioactive symbol. 

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