User:Ganokpat/sandbox

To avoid dangerous situation, there must be safety shower in chemistry laboratory. To help researchers and users recognize types of substances used in laboratory espeailly harmful chemicals, there are many kinds of indicators on wash bottles for users to notice including names, colors, symbols for hazard chemicals, and NFPA codes.

There are many different colors of wash bottles and many different colors of their lids which include red, white, green, yellow, and blue. These colors help researchers and users identify substances in wash bottles much more easily. The red color indicates that the substance in the wash bottle is acetone. The white color indicates that there is ethyl alcohol inside or sodium hypochlorite in the wash bottles. Furthermore, methanol will be put into the green. The yellow color indicates [[isopropanol. In addition, the blue color indicates that there is distilled water. 

There are many sign on wash bottles helping identify types of chemicals. For the chemical substances which are hazardous to human are classified into six principal categories including toxic, oxidizer, corrosive, flammable, explosive, and irritant substances. The sign for toxic substances is the picture with the skull and the two bones crossing behind the skull. This kinds of substance is prove to be dangerous to health. The picture of a flame with a circle in the middle of the flame indicates that the chemical substances are oxidizers. Therefore, organic materials can be burned. For the chemicals which are corrosive, the picture of an object which is coroded is the sign for this kind of substances. The picture of a flame without any circle in the middle helps recognize flammable substances. This kind of substances can result in the rapid ignity of many materials and substances.For the explosive substances, the picture of an object which is explode is used as a sign for explosive chemicals. In addition, the sign for irritant substances is the picture of the exclamation mark.