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Topic: Chemical substance

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Chemical element

Binary compound

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Negative atomic ion

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Periodic table period

Nonpolar

Ingestion

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	OHSU Health - Substance Abuse / Chemical Dependency (Site not responding. Last check: 2007-10-20)
		Substance abuse problems are more likely to be discovered by physicians when adolescents are injured in accidents occurring while under the influence, or when they are brought for medical services because of intentional efforts to hurt themselves.
		Substance abuse is used to describe a pattern of substance (drug) use leading to significant problems or distress such as failure to attend work/school, substance use in dangerous situations (driving a car), substance-related legal problems, or continued substance use that interferes with friendships and or family relationships.
		Chemical dependence is also used to describe the compulsive use of chemicals (drugs or alcohol) and the inability to stop using them despite all the problems caused by their use.
	www.ohsuhealth.com /htaz/mental/substance_abuse_chemical_dependency.cfm (0 words)

	Chemical substance - Wikipedia, the free encyclopedia
		Typical chemical substances found in the home are water, salt (sodium chloride) and sugar (sucrose).
		Often a pure substance needs to be isolated from a mixture, for example from a natural source (where a sample often contains numerous chemical substances) or after a chemical reaction (which often give mixtures of chemical substances).
		Finally, chemical analysis may be used to identify the chemical composition and to assay the purity.
	en.wikipedia.org /wiki/Chemical_substance (1107 words)

	Chemical Safety Glossary (Site not responding. Last check: 2007-10-20)
		This is the consequence of one chemical (or group of chemicals) counteracting the effects of another: in other words, the situation where exposure to two chemicals together has less effect than the simple sum of their independent effects; such chemicals are said to show antagonism.
		Analysis of the amounts of potentially toxic substances or their metabolites present in body tissues and fluids, as a means of assessing exposure to these substances and aiding timely action to prevent adverse effects.
		In chemistry, this is a water soluble derivative of a chemical formed by its combination with glucuronic acid, glutathione, sulphate, acetate, glycine etc. Usually conjugation takes place in the liver and facilitates excretion of chemicals that would otherwise tend to accumulate in the body because of their solubility in body fat.
	www.bio.hw.ac.uk /edintox/glossall.htm (0 words)

	EPA/OPPT/High Production Volume (HPV) Challenge Program Guidance for What to Test for the HPV Challenge
		The issue of precisely what form of a chemical substance should be tested, or the “test substance,” in the HPV Challenge’s battery of health and environmental fate and effects testing is often a difficult, complex issue.
		Class 2 Substances are defined as “chemical substances which may have variable compositions or be composed of a complex combination of different molecules.
		On occasion there have been chemical substances that can not be isolated at a purity of 99% and EPA has adjusted its purity requirement on the test substance to as low as 95%.
	www.epa.gov /chemrtk/pubs/general/w2test9.htm (0 words)

	CHSP: Appendices: CHEMICAL TOXICOLOGY OVERVIEW
		Toxicity is the ability of a chemical substance or compound to produce injury once it reaches a susceptible site in, or on, the body.
		The toxic potency of a chemical is thus ultimately defined by the dose (the amount) of the chemical that will produce a specific response in a specific biological system.
		Examples of substances where skin absorption may be a significant factor include: pesticides, carbon disulfide, carbon tetrachloride, dioxane, methanol, acetonitrile, mercury, thallium compounds, xylene and hydrogen cyanide.
	www.lbl.gov /ehs/chsp/html/toxicology.shtml (0 words)

	Chemical & Physical Changes - for 11 to 14 year-olds: By Laura Gallagher, Loreto College, Coleraine.
		A chemical reaction occurs when two or more chemical substances are mixed together and change into new substances.
		A chemical change is usually contrasted with a physical change, in which a substance changes form but keeps its chemical properties remains the same.
		The distinction between physical and chemical change is not absolute, and some important types of change, such as the dissolving of salt in water, could be regarded as either being chemical or physical, or both.
	www.lcc.ukf.net /KS3Chem/chemphychanges.htm (0 words)

	Chemical substance - Biocrawler (Site not responding. Last check: 2007-10-20)
		A chemical substance is any material substance used in or obtained by a process in chemistry:
		A chemical compound is a substance consisting of two or more chemical elements that are chemically combined in fixed proportions.
		A chemical element is a substance that cannot be divided or changed into different substances by ordinary chemical methods.
	www.biocrawler.com /encyclopedia/Chemical (0 words)

	Substance Abuse/Chemical Dependence
		Substance abuse - Substance abuse is used to describe a pattern of substance (drug) use leading to significant problems or distress such as failure to attend school, substance use in dangerous situations (driving a car), substance-related legal problems, or continued substance use that interferes with friendships and or family relationships.
		Substance dependence - Substance dependence is used to describe continued use of drugs or alcohol, even when significant problems related to their use have developed.
		Chemical dependence - Chemical dependence is also used to describe the compulsive use of chemicals (drugs or alcohol) and the inability to stop using them despite all the problems caused by their use.
	www.chw.org /display/PPF/DocID/21784/router.asp (0 words)

	Chemicals policy in the Asia-Pacific region
		Chemicals regulation in Japan is focused on the Chemical Substances Control Law, which was enacted in 1973 and has been amended a number of times since.
		New chemicals that are persistent and bioaccumulative require a wider range of toxicity studies; those that are persistent but do not bioaccumulate must be evaluated for potential long-term toxicity.
		All chemicals not on the Existing Chemical Substances list are considered new chemicals, and a dossier including safety information must be submitted to the regulator.
	www.chemicalspolicy.org /asia.shtml (0 words)

	Substance Abuse / Chemical Dependence - Child and Adolescent Mental Health - Health Library - Children's Hospital of ...
		Substance abuse is used to describe a pattern of substance (drug) use leading to significant problems or distress such as failure to attend school, substance use in dangerous situations (driving a car), substance-related legal problems, or continued substance use that interferes with friendships and or family relationships.
		A lack of research studying youthful substance use and abuse leaves questions concerning how it differs from substance abuse in other age groups unanswered.
		However, adolescent substance abuse is believed by some to be the most commonly missed pediatric diagnosis.
	www.chkd.com /Mental_Health/sacd.asp (0 words)

	Chemical Substance Names in CA SEARCH (File 399)
		A specific chemical substance can be searched by the CAS Registry Number for the substance, or by a non-systematic, common or trade name of the substance.
		The highest possible recall for information on specific chemical substances is achieved using a combination of CAS Registry Number(s) and the various names used to designate the substance.
		The names of chemical substances are often compound words composed of chemically significant words or word fragments that describe structure and composition.
	support.dialog.com /searchaids/dialog/f399_segmentation.shtml (0 words)

	OSU-CHS \| Future Students \| Chemical Substance Use Policy (Site not responding. Last check: 2007-10-20)
		The mental and physical health and well-being of students is vital to the success of the College and to the student, and is necessary to maintain the high standards of health care provided to the general public.
		“Illegal chemical substance” is any substance that an individual may not sell, possess, use, or distribute under the laws of the federal government and state in which he or she is employed, resides, or is engaged in an approved course of study.
		A student may be subject to dismissal or may be referred to legal authorities if he or she possesses, uses, distributes, sells, or is under the influence of an illegal chemical substance while in class, on campus, or as a representative of the College during or outside normal classroom hours.
	www.healthsciences.okstate.edu /student/academic_info/chemical.cfm (0 words)

	Toxic Substances Control Act (TSCA) Chemical Substances Inventory
		Section 5 requires importers of chemical substances to determine if the chemical substance, mixture, or article (containing a chemical substance or mixture) is a TSCA chemical substance or a “new chemical substance” prior to its importation for a nonexempt commercial purpose.
		The small manufacturer exemption does not apply if the substance being produced is subject to a rule proposed or promulgated, or order under sections 4, 5 or 6 of the Act or is the subject of relief granted under a civil action under sections 5 or 7 of the Act.
		A new chemical substance is one that is not already in commerce in the United States, as determined by inclusion in the TSCA Inventory of Chemical Substances maintained by EPA.
	www.bordercenter.org /tsca.htm (0 words)

	The MSDS HyperGlossary: Chemical Formula
		A chemical formula expresses the exact composition of a molecule or substance using the chemical abbreviations of the chemical elements.
		A chemical element is a substance that can not be separated into simpler substances by chemical means.
		Chemical names are not always reliable because a common chemical may be known by several different names.
	www.ilpi.com /msds/ref/chemicalformula.html (0 words)

	Chemical Safety Training Modules
		Chemical safety data sheets should be available within the enterprise for every chemical substance that has been classified as hazardous.
		However, if the ingredient substance is classified dangerous and known to present a health hazard, and if substance has been given an exposure limit value, these substances should be included in the safety data sheet with indication of the concentration range.
		Substances or preparations with pH values 0-2 or 11.5-14 may be classified as corrosive.
	www.itcilo.it /english/actrav/telearn/osh/kemi/ctm3.htm (0 words)

	PackagingLaw.com - The On-Line Resource for Packaging Law (Site not responding. Last check: 2007-10-20)
		Articles that generate a surface chemical reaction, but maintain their overall structure and shape, are deemed to retain their article status in China.
		Chemicals used in the following types of products are regulated under other existing laws and regulations in China: pesticides, tobacco and tobacco products, radioactive substances, military industry products, pyrotechnics, pharmaceuticals, food, feed, feed additives, veterinary drugs, and biological substances.
		Labels must identify the chemical or its hazardous components, and include a U.N. Transport of Dangerous Goods (UNTDG) hazard symbol, a unique Chinese CN number (which must be on the Safety Data Sheet, as well), the appropriate signal words, a hazard summary and safety phrases, applicable reference(s), and an emergency telephone number.
	www.packaginglaw.com /index_mf.cfm?id=182 (0 words)

	Preparing for the new IUR
		EPA raised the production volume reporting threshold from 10,000 lbs per year per chemical substance to 25,000 lbs per year per chemical, and to 300,000 lbs or greater per year for the reporting of processing and use information.
		Or, if the chemical substance is site-limited, the maximum concentration at the time it is reacted on-site to produce a different chemical substance.
		Producers of chemical substances with production volumes of 300,000 lbs or greater per year must report exposure-related information concerning the processing and use of each reportable chemical substance at sites that receive the reportable chemical substance from the submitter site directly or indirectly.
	www.chemicalprocessing.com /articles/2004/156.html (0 words)

	US CODE: Title 15,2605. Regulation of hazardous chemical substances and mixtures
		(3) A requirement that such substance or mixture or any article containing such substance or mixture be marked with or accompanied by clear and adequate warnings and instructions with respect to its use, distribution in commerce, or disposal or with respect to any combination of such activities.
		Any manufacturer or processor subject to a requirement to replace or repurchase a chemical substance or mixture may elect either to replace or repurchase the substance or mixture and shall take either such action in the manner prescribed by the Administrator.
		(ii) good faith efforts have been made to develop a chemical substance which does not present an unreasonable risk of injury to health or the environment and which may be substituted for such polychlorinated biphenyl.
	www4.law.cornell.edu /uscode/15/2605.html (0 words)

	Background - Toxic Substance Control Act (TSCA) (Site not responding. Last check: 2007-10-20)
		EPA assesses whether the chemical substance presents an unreasonable risk of injury to health or the environment by weighing the risks versus the social and economic benefits of introducing the chemical into commerce.
		If a chemical substance or mixture is covered by any of these circumstances, an exporter must notify EPA of the country of destination the first time a chemical is shipped to the country during a calendar year.
		TSCA Section 13 requires that any chemical substance, mixture, or article containing a chemical substance or mixture be in compliance with TSCA and, in addition, EPA requires import certification.
	www.chemalliance.org /Handbook/background/back-tsca.asp (0 words)

	Chemical Literature Course, Lecture 12
		Once a set of substances has been located, you may retrieve references one compound at a time by clicking the "References" button associated with the compound record.
		This works well for substances with common or trade names, but can be difficult to impossible when trying to use complex systematic names.
		Moreover, it is impossible to search for families of names, such as in plastics, dyes and other commercial substances where a whole group of materials may vary only in the latter part of the name.
	www.library.ucsb.edu /classes/chem184/184lecm.html (0 words)

	The MSDS HyperGlossary: Chemical
		As a noun, the common definition of chemical is a substance that is produced or used in a process (reaction) involving changes to atoms or molecules.
		As an adjective, "chemical" means "of or pertaining to chemistry".
		Chemical Incident Preparedness and Response Links here at ILPI (with a slant towards terrorism incidents).
	www.ilpi.com /msds/ref/chemical.html (0 words)

	Chemical compound - Wikipedia, the free encyclopedia
		A chemical compound is a chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition.
		The ratio of each element is usually expressed by chemical formula.
		Every chemical compound that has been described in the literature carries a unique numerical identifier, its CAS number.
	en.wikipedia.org /wiki/Chemical_compound (0 words)

	Chemical Information --
		Chemical substances can appear under a variety of names in the sources you will be using.
		Substances by IUPAC Name [Intn'tl Union of Pure and Applied Chemists]; separate indices for organic and inorganic compounds.
		As in the Substance Index, synthesis, characteristics, and applications of substances are noted with the exception of especially common substances which have references to the Substance Index.
	www.library.yale.edu /scilib/chem/chemsubj.html (0 words)

	CAS REGISTRY Overview
		The largest and most current database of chemical substance information in the world containing more than organic and inorganic substances and sequences.
		The CAS REGISTRY covers substances identified from the scientific literature from 1957 to the present, with additional substances going back to the early 1900s.
		They are assigned in sequential order to unique, new substances identified by CAS scientists for inclusion in the database.
	www.cas.org /EO/regsys.html (0 words)

	Substance Abuse / Chemical Dependence - Lucile Packard Children's Hospital
		Substance Abuse / Chemical Dependence - Lucile Packard Children's Hospital
		Specific treatment for substance abuse/chemical dependence will be determined by your adolescent's physician based on:
		Lucile Packard Children's Hospital is located in Palo Alto, adjacent to Stanford University Hospital, approximately 20 miles north of San Jose, CA and 40 miles south of San Francisco.
	www.lpch.org /DiseaseHealthInfo/HealthLibrary/adolescent/sacd.html (0 words)

	Chemical Safety - NIOSH Topic Page
		NMAM is a collection of methods for sampling and analysis of contaminants in workplace air, and in the blood and urine of workers who are occupationally exposed.
		IPCS cards summarize essential health and safety information on chemicals for their use at the "shop floor" level by workers and employers in factories, agriculture, construction and other work places.
		It provides information about the additivity or interaction potential between chemical substances in a mixture found in the workplace.
	www.cdc.gov /niosh/topics/chemical-safety (0 words)

	How to Find CAS Registry Numbers for Chemical Compounds
		Chemical Abstracts Service (CAS) has a registry system for all completely identified chemical compounds or substances.
		Each individual chemical substance is assigned a CAS Registry Number which may be thought of as that substance's "Social Security number." (For more information, see What does a CAS Registry Number look like?
		If the substance retrieved is not the one you want or you cannot find the CAS registry number in any of the sources listed below, you may then search the Registry File by substance name or molecular formula.
	library.humboldt.edu /~chadwick/casregno.htm (0 words)

	Drug and Substance Abuse Chemical Dependency Treatment Services Center (Site not responding. Last check: 2007-10-20)
		provide a safe and therapeutic environment where those who suffer from the effects of drug addiction, alcoholism, chemical dependency, substance abuse and other harmful drug addictions can heal the body, mind and spirit in a peaceful setting.
		We know treatment works — people can and do recover from their addiction to alcohol or other drugs when given the opportunity to participate in a professional substance abuse treatment program.
		Our mission is to provide a comprehensive continuum of chemical dependency treatment services in a nurturing, supportive environment that facilitates the healing process for chemically dependent people and their families by addressing their physical, psychological, emotional and spiritual needs.
	www.dovetreeranch.com (0 words)

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