Self-reactive substances and mixtures and Organic peroxides Pressurized container may burst if heatedįire, blast, or projection hazard if the desensitizing agent is reduced Hazardous to the aquatic environment, long-term hazard Hazardous to the aquatic environment, acute hazard Specific target organ toxicity, single exposure, Narcotic effects Specific target organ toxicity, single exposure, Respiratory tract irritation Specific target organ toxicity, repeated exposureĬauses damage to organs through prolonged or repeated exposure Specific target organ toxicity, single exposure May damage fertility may damage the unborn child Highly toxic in small amounts, serious health effects or death The classes, their categories and pictograms are as follows: Health Hazards The higher the category number, the lower the hazard. Category 1 or A always represents the highest hazard within that class. Some classes have five categories other classes have only one category. The severity of the hazard within each class is described by the category. The GHS classification further divides health and physical hazards into separate classes such as toxicity, irritation, sensitization, flammability, etc. For example, a highly toxic chemical requires a statement "Fatal if inhaled or swallowed". Based on the classification of the product, the hazards are described in standardized phrases called "hazard statements". The signal word "Danger" is used for severe hazards and "Warning" is used for less severe hazards. The pictograms are explained in the next paragraph. The main health and physical hazards have to be indicated on the product label by using pictograms, signal words, and standardized hazard statements. Some manufacturers already comply with this regulation. OSHA has adopted GHS, and beginning June 2015, all manufacturers are required to prepare labels and SDS according to GHS. The Globally Harmonized System (GHS) was developed by the United Nations for international standardization of hazard classification and communication. Manufacturers and distributors are required to provide safety data sheets to their clients that describe the results of the classification and all known hazards of a chemical. The identified hazards have to be communicated on the container label and in documents called Safety Data Sheets (SDS). The evaluation is performed by classifying each chemical based on published toxicological or other data to determine its physical and health hazards. The Hazard Communication Standard (29CFR 1910.1200) requires all manufacturers or distributors of any products containing chemicals to evaluate the chemical hazards of the product.
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