A chemical is any mix of raw elements: hydrogen + oxygen produce the chemical water. Water is created by a change in the chemistry of hydrogen and oxygen atoms — a chemical change.

Be cautious of the negative reaction people have to chemical substances. Chemicals often bring to mind deadly substances, such as asbestos or deadly chemical weapons. But many chemicals are part of our everyday life. Our lives would be drastically different without chemical compounds — think of the infection that would result if we didn't have the chemical hydrogen peroxide for cleaning out cuts.

Definitions of chemical

adj of or made from or using substances produced by or used in reactions involving atomic or molecular changes

chemical fertilizer”

adj relating to or used in chemistry

chemical engineer”
chemical balance”

n material produced by or used in a reaction involving changes in atoms or molecules

chemical substance
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a chemical substance that undergoes a rapid chemical change (with the production of gas) on being heated or struck
a chemical substance that is present at the start of a chemical reaction
Alar, daminozide
a chemical sprayed on fruit trees to regulate their growth so the entire crop can be harvested at one time
an inactive substance that is a vehicle for a radioactive tracer of the same substance and that assists in its recovery after some chemical reaction
bacteriacide, bactericide
any chemical agent that destroys bacteria
carbon tetrahalide
compounds composed of 1 carbon and 4 halogen molecules
a minor chemical constituent that gives a wine or liquor its distinctive character
chemical compound, compound
(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
soil conditioner
a chemical substance used to improve the structure of the soil and increase its porosity
fertiliser, fertilizer, plant food
any substance such as manure or a mixture of nitrates used to make soil more fertile
a substance added to molten metals to bond with impurities that can then be readily removed
a chemical substance used in fumigation
herbicide, weed killer, weedkiller
a chemical agent that destroys plants or inhibits their growth
a substance formed during a chemical process before the desired product is obtained
a component of a mixture that has been separated by a fractional process
a chemical used to kill larval pests
a chemical used to kill pests (as rodents or insects)
a chemical substance obtained from plants that is biologically active but not nutritive
a chemical substance formed as a result of a chemical reaction
a chemical that is added to a photographic developer in order to retard development and reduce the amount of fog on a film
a chemical that is added to a solution or mixture or suspension to maintain it in a stable or unchanging state
a substance added to another to make it less hard
burster, bursting charge, charge, explosive charge
a quantity of explosive to be set off at one time
a substance used in washing (clothing or hair) to make things softer
explosive compound
a compound that is explosive
explosive mixture
a mixture that is explosive
impulse explosive, propellant explosive
an explosive that is used to propel projectiles from guns or to propel rockets and missiles or to launch torpedos and depth charges
load, payload, warhead
the front part of a guided missile or rocket or torpedo that carries the nuclear or explosive charge or the chemical or biological agents
a crystalline compound found in vanilla beans and some balsam resins; used in perfumes and flavorings
(chemistry) in the formation of a coordinate bond it is the compound to which electrons are donated
a compound formed by an addition reaction
any of various compounds that are added to gasoline to reduce engine knocking
plasticiser, plasticizer
a substance added to plastics or other materials to make them more pliable
acaracide, acaricide
a chemical agent used to kill mites
Agent Orange
a herbicide used in the Vietnam War to defoliate forest areas
a pesticide or drug containing arsenic
any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
a compound of arsenic with a more positive element
HN, azoimide, hydrazoic acid, hydrogen azide
a colorless explosive liquid that is volatile and poisonous and foul-smelling
hydrogen cyanide
a highly poisonous gas or volatile liquid that smells like bitter almonds; becomes a gas at around 90 degree Fahrenheit and is most dangerous when inhaled; the anhydride of hydrocyanic acid; used in manufacturing
a product of hydrolysis
anionic compound
a compound characterized by an active anion
alkali, base
any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water
binary compound
chemical compound composed of only two elements
a synthetic compound derived from triazine that is widely used as an agricultural herbicide
a colorless crystalline substance obtained from the bile of mammals
a compound that can be converted to a pigment
manganese tetroxide
an oxide of manganese found naturally as hausmannite
a simple compound whose molecules can join together to form polymers
any of a class of unstable chemical compounds resulting from the addition of ozone to a double bond in an unsaturated compound
any of a class of highly unsaturated yellow to red pigments occurring in plants and animals
organic compound
any compound of carbon and another element or a radical
a complex inorganic compound that contains ammonia molecules
a compound formed from one or more other compounds in a reaction resulting in removal of water
a chemical compound containing the azido group combined with an element or radical
bitter principle
any one of several hundred compounds having a bitter taste; not admitting of chemical classification
(chemistry) an ionic compound that resists changes in its pH
calcium-cyanamide, cyanamide
a compound used as a fertilizer and as a source of nitrogen compounds
a compound containing metal combined with carbon monoxide
carbon disulfide
a toxic colorless flammable liquid (CS2); used in the manufacture of rayon and cellophane and carbon tetrachloride and as a solvent for rubber
a substance (as a coenzyme) that must join with another to produce a given result
cementite, iron carbide
a chemical compound that is a constituent of steel and cast iron; very hard and brittle
chloropicrin, nitrochloroform
a heavy colorless insoluble liquid compound that causes tears and vomiting; used as a pesticide and as tear gas
complex, coordination compound
a compound described in terms of the central atom to which other atoms are bound or coordinated
any of several different crystalline forms of the same chemical compound
a substance having the tendency to cause corrosion (such a strong acids or alkali)
a compound of alumina and a metallic oxide
a chemical that is sprayed on plants and causes their leaves to fall off
a chemical (usually a sulfide) used to remove hair or wool or bristles from hides
a compound obtained from, or regarded as derived from, another compound
a compound whose molecules are composed of two identical monomers
high explosive
a powerful chemical explosive that produces gas at a very high rate
low explosive
an explosive with a low rate of combustion
organic, organic fertiliser, organic fertilizer
a fertilizer that is derived from animal or vegetable matter
soldering flux
flux applied to surfaces that are to be joined by soldering; flux cleans the surfaces and results in a better bond
potassium bromide
a white crystalline salt (KBr) used as a sedative and in photography
the product of filtration; a gas or liquid that has been passed through a filter
fixer, fixing agent
a chemical compound that sets or fixes something (as a dye or a photographic image)
a colorless crystalline compound that is part of a number of white or yellow plant pigments
any of a large class of plant pigments having a chemical structure based on or similar to flavone
formulation, preparation
a substance prepared according to a formula
enantiomer, enantiomorph
either one of a pair of compounds (crystals or molecules) that are mirror images on each other but are not identical
a compound that gives off heat during its formation and absorbs heat during its decomposition
any substance (such as thiouracil) that induces the formation of a goiter
benzofuran, coumarone, cumarone
a colorless oily compound extracted from coal tar and used in manufacturing synthetic resins
synthetic, synthetic substance
a compound made artificially by chemical reactions
any compound that contains water of crystallization
a chemical compound containing the hydroxyl group
a substance that produces a fragrant odor when burned
inorganic compound
any compound that does not contain carbon
insect powder, insecticide
a chemical used to kill insects
repellant, repellent
a chemical substance that repels animals
repellant, repellent
a compound with which fabrics are treated to repel water
a compound containing the covalent iodine radical
a compound that exists in forms having different arrangements of atoms but the same molecular weight
hydrated oxide, hydroxide
a compound of an oxide with water
a herbicide that kills weeds without harming vegetables
a crystalline compound that has the cool and minty taste and odor that occurs naturally in peppermint oil; used as a flavoring and in medicine to relieve itching, pain, and nasal congestion
nitrogen mustard
a toxic compound resembling mustard gas in structure; important in cancer treatment
a compound containing nitrogen and a more electropositive element (such as phosphorus or a metal)
any compound of oxygen with another element or a radical
a poisonous yellow solid used in solution as a herbicide
a chemical agent that kills lice
a colorless gas with a strong fishy smell; used as a pesticide
a naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers
a chemical compound that is added to protect against decay or decomposition
benzoquinone, quinone
any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes
a compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)
any chemical substance that burns or destroys living tissue
any compound containing the nitrate group (such as a salt or ester of nitric acid)
gunpowder, powder
a mixture of potassium nitrate, charcoal, and sulfur in a 75:15:10 ratio which is used in gunnery, time fuses, and fireworks
Ballistite, smokeless powder
an explosive (trade name Ballistite) that burns with relatively little smoke; contains pyrocellulose and is used as a propellant
any compound containing a chlorine atom
heterocycle, heterocyclic, heterocyclic compound
a compound containing a heterocyclic ring
a drug that destroys the itch mite that causes scabies
sheep dip
a liquid mixture containing pesticides in which sheep are dipped to kill parasites
any of various compounds of silicon with a more electropositive element or radical
any of a large class of compounds that have alternate silicon and oxygen atoms
a herbicide that is effective in controlling woody plants but is toxic to animals
a herbicide used to control weeds (especially among crops)
a compound formed by solvation (the combination of solvent molecules with molecules or ions of the solute)
a pesticide in suspension or solution; intended for spraying
water softener
a substance (such as sodium chloride) that lessens the hardness of water by replacing calcium and magnesium ions with sodium ions and so gives the water more efficient sudsing power
sternutator, sternutatory
a chemical substance that causes sneezing and coughing and crying
a chemical compound used to remove paint or varnish
sulfide, sulphide
a compound of sulphur and some other element that is more electropositive
any binary compound of tellurium with other more electropositive elements
tenderiser, tenderizer
a substance (as the plant enzyme papain) applied to meat to make it tender
any compound that contains four chlorine atoms per molecule
nitramine, tetryl
a yellow crystalline explosive solid that is used in detonators
any of three isomeric compounds having three carbon and three nitrogen atoms in a six-membered ring
U308, yellowcake
an impure mixture of uranium oxides obtained during the processing of uranium ore
a colored glassy compound (opaque or partially opaque) that is fused to the surface of metal or glass or pottery for decoration or protection
a compound found in women's urine during certain phases of the menstrual cycle and in the urine of pregnant women
Type of:
material, stuff
the tangible substance that goes into the makeup of a physical object

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