Clinical chemistry is that field of clinical pathology involved with analysis of body fluids. The discipline originated within the late nineteenth century with the use of simple chemical tests for diverse elements of blood and waste product. After this, totally different techniques like electrophoresis were applied at the side of the use and live of catalyst activities, spectrophotometry, action, and bioassay. Pharmacology is additionally a branch of biology, chemistry, and medicines committed the study of the adverse effects of chemicals on living organisms. Chemistry Nanotechnology are the study and application of extremely small things or molecules in the field of drug discovery. 

Forensic chemistry is the application of chemistry to law enforcement or the failure of products or processes. Many different forensic data analytical methods may be used to reveal what chemical changes occurred during an incident, and so help reconstruct the sequence of events. "Forensic chemistry is unique among chemical sciences in that its research, practice, and presentation must meet the needs of both the scientific and the legal communities. As such, forensic chemistry research is applied and derivative by nature and design, and it emphasizes metrology and validation."

The art or practice of using herbs and herbal preparations to maintain health and to prevent, alleviate, or cure disease and a plant or plant part or an extract or mixture of these used in herbal medicine by the Plant extraction method of drug formulation. Herbal and drug interaction and evaluation, in which the herbal drug is used to diagnose, cure, treat, or prevent disease. Drug therapy is an important part of the medical field and relies on the science of pharmacology for continual advancement and on pharmacy for appropriate management of Herbal drugs/compounds discovery and development. A pharmacological study of Natural herbal products is a method of using natural herbs and plants to promote physical, emotional, and spiritual health. Individuals interested in studying herbal pharmacology at the clinical level of alternative medicine.

Inorganic chemistry is concerned with the properties and reactivity of all chemical elements. Advanced interests focus on understanding the role of metals in biology and the environment, the design and properties of materials for energy and information technology, fundamental studies on the reactivity of main group and transition elements, and nanotechnology. Synthetic efforts are directed at hydrogen storage materials and thermoelectrics, catalysts for solar hydrogen generation, fullerenes and metal porphyrins, metal clusters and compounds with element-element bonds, as well as nanowires and nanoparticles.

Electrochemistry is the study of chemical processes that cause electrons to move. This movement of electrons is called electricity, which can be generated by movements of electrons from one element to another in a reaction known as an oxidation-reduction  ("redox") reaction which can be measured by standard electrode potential.

Geochemistry is the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth's crust and its oceans. The realm of geochemistry extends beyond the Earth, encompassing the entire Solar System and has made important contributions to the understanding of a number of processes including mantle convection, the formation of planets and the origins of granite and basalt. Geochemistry involves different aspects like Cosmo chemistry, Organic geochemistry, Photo geochemistry, Isotope geochemistry, Biogeochemistry, Aqueous geochemistry.

Analytical chemistry is the study of the separation, identification, quality control and quality assurance of the chemical parts of natural and artificial materials. The maintenance of a desired level of quality in an exceedingly service or product, particularly by means that of attention to each stage of the method of delivery or production. Bio analytical Chemistry could be a sub-division of Analytical Chemistry that covers the measuring of medicine, Ion sensors, Proteins and DNA in unnatural samples or concentrations. Correct quantification of the drug samples is extremely very important for several scientific endeavours which can not hinder the result. Therefore the Bio analytical Techniques are in the main focussed to induce the correct results of the drug sample to supply an ideal result.

The study of Polymer chemistry or polymer sciences begins with understanding the methods in which these materials are synthesized. Polymer synthesis is a complex procedure and can take place in a variety of ways. Addition polymerization describes the method where monomers are added one by one to an active site on the growing chain. Polymers are huge macromolecules composed of repeating structural units. While polymer in popular usage suggests plastic, the term actually refers to a large class of natural and synthetic materials. Due to the extraordinary range of properties accessible, Polymer Sciences have come to play an essential and ubiquitous role in everyday life - from plastics and elastomers on the one hand to natural biopolymers such as DNA and proteins on the other hand.

Nuclear chemistry is the subfield of chemistry dealing with radioactivity and its tracers, nuclear processes, such as nuclear transmutation, and nuclear properties. It is the chemistry of radioactive elements such as the actinides, radium and radon together with the chemistry associated with equipment (such as nuclear reactors) which are designed to perform nuclear processes. It includes the study of the chemical effects resulting from the absorption of radiation within living animals, plants, and other materials. The radiation chemistry controls much of radiation biology as radiation has an effect on living things at the molecular scale, to explain it another way the radiation alters the bio chemicals within an organism, the alteration of the biomolecules then changes the chemistry which occurs within the organism, this change in chemistry then can lead to a biological outcome.

Environmental Chemistry is a branch of atmospheric science in which the chemistry of the Earth's atmosphere and that of other planets is studied. It is a multidisciplinary field of research and draws on environmental chemistry, physics, meteorology, computer modelling , oceanography, geology and volcanology and other disciplines. The composition of the Earth's atmosphere changes as result of natural processes such as volcano emissions, lightning and bombardment by solar particles from corona. It has also been changed by human activity and some of these changes are harmful to human health, crops and ecosystems. Examples of problems which have been addressed by atmospheric chemistry include acid rain, ozone depletion, photochemical smog, greenhouse gases and global warming. 

Quantum science is a branch of science whose essential concentration is the use of quantum mechanics in physical models and examinations of compound frameworks. It is likewise called sub-atomic quantum mechanics. Trial quantum scientific experts depend vigorously on spectroscopy, through which data in regards to the quantization of vitality on an atomic scale can be acquired. Normal techniques are infra-red (IR) spectroscopy and atomic attractive reverberation (NMR) spectroscopy. 

A bio-based material is a material purposefully produced using substances got from living (or once-living) life forms. These materials are once in a while alluded to as biomaterials, yet this word likewise has another significance. Entirely the definition could incorporate numerous normal materials, for example, wood and leather, yet it commonly alludes to advanced materials that have experienced more broad preparing. Natural materials might be called biotic material. Bio-based materials or biomaterials fall under the more extensive class of bioproducts or bio-based items which incorporates materials, chemicals and vitality got from renewable natural assets.

Food chemistry is the study of chemical processes and interactions of all biological and non-biological components of foods. The biological substances include such items as meat, poultry, lettuce, beer, and milk as examples. It is similar to biochemistry in its main components such as carbohydrates, lipids, and protein, but it also includes areas such as water, vitamins, minerals, enzymes, food additives, flavours, and colours. This discipline also encompasses how products change under certain food processing techniques and ways either to enhance or to prevent them from happening. Whereas hydrocolloids are polysaccharides of high molecular weight extracted from plants and algae or produced by microbial synthesis. A hydrocolloid is a suspension of particles in water where the particles are molecules that bind to water and to one another. The particles slow the flow of the liquid or stop it entirely, solidifying into a gel. Hydrocolloids can be applied to many food applications and categories. Hydrocolloids have a wide array of functional properties in foods including; thickening, gelling, emulsifying, stabilization and coating.