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A chemical substance is a unique form of matter with constant chemical composition and characteristic properties. Chemical substances may take the form...26 KB (3,282 words) - 23:47, 11 June 2024
chemical reference substance: a chemical reference substance ... whose value is accepted without requiring comparison to another chemical substance....26 KB (2,621 words) - 12:30, 9 June 2024- A chemical element is a chemical substance that cannot be broken down into other substances by chemical reactions. The basic particle that constitutes...74 KB (9,741 words) - 02:14, 30 August 2024
- substance's chemical identity. Simply speaking, chemical properties cannot be determined just by viewing or touching the substance; the substance's internal...2 KB (279 words) - 00:19, 3 September 2024
- Effects of Chemical Substances (RTECS) is a database of toxicity information compiled from the open scientific literature without reference to the validity...4 KB (374 words) - 14:54, 19 January 2024
origin of the source material determine the chemical structure of humic substances. In general, humic substances derived from soil and peat (which takes hundreds...34 KB (4,275 words) - 08:39, 20 July 2024- A substance of very high concern (SVHC) is a chemical substance (or part of a group of chemical substances) which has been proposed as a candidate for...11 KB (1,146 words) - 22:46, 16 August 2024
to as "existing chemicals", while chemicals not listed are referred to as new chemicals. The TSCA defines the term "chemical substance" as "any organic...100 KB (11,646 words) - 18:20, 31 August 2024
Organic compound (redirect from Organic substance)Structures and a large diversity of physical and chemical properties are available for each substance, with reference to original literature. PubChem contains...21 KB (2,288 words) - 21:04, 24 June 2024- Reactivity (chemistry) (redirect from Chemical reactivity)In chemistry, reactivity is the impulse for which a chemical substance undergoes a chemical reaction, either by itself or with other materials, with an...8 KB (1,202 words) - 17:27, 16 January 2024
Dangerous goods (redirect from Hazardous substance)Dangerous goods (DG), are substances that are a risk to health, safety, property or the environment during transport. Certain dangerous goods that pose...26 KB (2,796 words) - 15:49, 4 September 2024- Chemistry (redirect from Chemical resources)undergo during reactions with other substances. Chemistry also addresses the nature of chemical bonds in chemical compounds. In the scope of its subject...83 KB (9,192 words) - 00:41, 20 July 2024
Restriction of Chemicals (REACH) is a European Union regulation dating from 18 December 2006. REACH addresses the production and use of chemical substances, and...35 KB (3,876 words) - 18:08, 3 June 2024
CAS Registry Number (redirect from CAS reference number)Chemical Abstracts Service (CAS) in the US to every chemical substance described in the open scientific literature, in order to index the substance in...12 KB (1,224 words) - 15:23, 16 April 2024- a full chemical structural formula. Chemical formulae can fully specify the structure of only the simplest of molecules and chemical substances, and are...24 KB (3,205 words) - 14:13, 13 July 2024
Toxicity (redirect from Chemical Exposure)Toxicity is the degree to which a chemical substance or a particular mixture of substances can damage an organism. Toxicity can refer to the effect on...30 KB (3,274 words) - 17:40, 1 September 2024- Physical change (category Articles needing additional references from November 2011)Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures...4 KB (578 words) - 03:46, 22 April 2022
Corrosion (redirect from Corrosive substance)of materials occurring in outer space Corrosive substance – Gradual destruction of materials by chemical reaction with its environmentPages displaying short...48 KB (6,215 words) - 10:55, 15 August 2024- the term chemically inert is used to describe a substance that is not chemically reactive. From a thermodynamic perspective, a substance is inert, or...5 KB (583 words) - 18:24, 27 April 2024
Substance abuse, also known as drug abuse, is the use of a drug in amounts or by methods that are harmful to the individual or others. It is a form of...99 KB (10,180 words) - 12:04, 27 August 2024
- itself as an elevation or a lowering of the temperature of the substance in question. By chemical action, the structure of the molecule is changed, the atoms
- A chemical element is a chemical substance that cannot be broken down into other substances by chemical reactions. The basic particle that constitutes
- generally the only definitive way to search for chemical substances, searching by substance identifiers (chemical names and various identifying numbers) or