Forensic chemistry is the application of chemistry to the investigation of a crime. The investigation of the crime is, however, is not limited to crime against individuals such as home suicidal, theft, fraud and arson. Forensic chemists also involved in the investigations of crime against society such as food adulteration, environmental pollution, use and pollution of unsafe chemicals and dangerous working conditions. The application of chemistry to the study of physical or theoretical problems, the results of which may be entered into court as technical evidence. Boundaries are not sharply defined for forensic chemistry, and it includes topics that are not entirely chemical by nature. Some of the items most often encountered in crime laboratories, and the information sought in regard of them , are: (1) Body fluids and viscera to be analyzed for poisons, drugs or alcohol, quantization of which may assist in determining the dosage taken or the person's behavior prior to death; (2) Licit and licit pills, vegetable matter, and pipe residues for the presence of controlled substances; (3) Blood, saliva, and seminal stains, usually in dried form, to be checked for species, type and genetic data. (4) hairs to determine animal or human; if human, the race, body area of originated general characteristics; (5) Fibers, to determine type ( vegetable, animal, mineral or synthetic), composition, dyes used, and processing marks; (6)liquor, for alcoholic proof, trace alcohols, sugars, colorants, and other signs of adulteration; (7)paint, glass, plastics, and metals, usually in millimeter -sized chips, to classify and compare known materials; (9) Swabs from the hands of the suspects, to be checked for the presence of gunshot residue; (10) Debris from a fire or explosion scene, for the remains of the accelerant or explosive used. Forensic Toxicology is an interdisciplinary science dealing with and interpretation of drugs and chemical samples for medical-legal purposes the hybrid and analytical chemistry, pharmacy toxicology.
