ChemSub Online: The Free Web Portal and Information System on Chemical Substances from around the World: Glossary and Acronyms - Letter N.
Provides information about:
- Chemical Inventories: Chemical inventory, AICS, DSL NDSL, EINECS, ELINCS, IECSC, NLP, NZIoC, TSCA.
- EC Number (EINECS, ELINCS, NLP), Chemical Name, Molecular Formula, Structure Formula.
- TSCA: TSCA Inventory List, TSCA Compliance Guide, TSCA Inventory Database, Current TSCA Inventory, Need TSCA Chemical List, Find Tsca, U. S. TSCA Inventory List, Many research chemists use updated TSCA Tracker to find new chem names.
- REACH: REACH compliance, REACH & GHS, REACHsuite, EU REACH IT Solutions, IT solutions for managing REACH compliance.

- Chemical Super Lists and Inventories:
Australian Inventory of Industrial Chemicals (Inventory) (AICIS),
Chemical Carcinogenesis Research Information System (CCRIS),
European Inventory of Existing Commercial Chemical Substances (EINECS),
European List of Notified Chemical Substances (ELINCS),
Europan chemical Substances information System (ESIS),
Hazardous Substances Data Bank (HSDB),
HSNO Chemical Classification and Information Database (CCID),
Inventory of Existing Chemical Substances Produced or Imported in China (IECSC),
Toxic Substances Control Act (TSCA),
ChemBlink, EPA HPV Challenge, EPA HPVIS, EU HPV-LPV, HSNO CCID, TOXLINE.
- Chemicals and Chemistry: Formaldehyde, chemicals, chemical substances, chemistry, Baytouch Systems.
- GHS, Globally Harmonized System of Classification and Labelling of Chemicals, Global harmonisiertes System zur Einstufung und Kennzeichnung von Chemikalien, SGH, Système général harmonisé de classification et d'étiquetage des produits chimiques, 化学品分类及标记全球协调制度, 化学品の分類および表示に関する世界調和システム.
- InChI, InChIKey, MOSFIJXAXDLOML-UHFFFAOYSA-N, smiles, IUPAC Name.

ChemSub Online: The Free Web Portal and Information System on Chemical Substances from around the World: Glossary and Acronyms - Letter N.
Provides information about:
- Chemical analysis, Dedicated Analytical Solutions for chemical analysis from Foss, Brewing Lab Services, Siebel Institute Lab Services Brewing Analytical Testing.
- Chemical Jobs Worldwide, Better Jobs. Better Candidates Chemicals, Polymers, Plastics.
- Chemical lists free.
- Chemical products Chemicals Service Solutions Europe Full service for specialty chem.
- Chemical Testing Find Chemical Testing Laboratories.
- 试剂公司,化工厂,化工产品,化工词典,结构式检索,有机化学,无机化学,化学试剂,有机原料.
- Classification Labelling Packaging, Annex I of Directive 67/548/EEC, Annex VI to Regulation (EC) No 1272/2008, CLP, GHS, hazard symbol, irritant hazard symbol, chemical hazard symbols, GHS symbols, farosymbol, frätande symbol, gefahrensymbol, symboles et indications des dangers.
- Endocrine disruptor, modulateur endocrinien, perturbateur endocrinien, endokrine disruptoren, 内分泌攪乱物質, 內分泌干擾素.
- High Quality Biochemicals.
- Lab Chemical Inventory, Integrate Chemical Inventory with your lab operations.
- Laboratory Consultants, Reaction Engineering, Atlas - Controlled Lab Reactor easy to use and flexible.
- Laboratory Testing, Reliability Testing of Components Component Analytical Services, Chemical Resistant Seals, Chemical resistant elastomer seals for all chemical reagents.
- The Dow Chemical Company, The leading chemical and plastics manufacturer. Test Labs Directory, ASTM Free Online Lab Directory Search by ASTM Standards.

ChemSub Online: The Free Web Portal and Information System on Chemical Substances from around the World: Glossary and Acronyms - Letter N.
Provides information about:
- Återvinning symbol, алкохол, гераниол, деканол, етилов алкохол, натриев пропионат, пентанол.
- エタプロコール, テオブロミン, 消毒用エタノール, 消毒用エタライト, 邻苯二甲酸酯.
- 5-diphenyl-1 4-pentadien-3-one, 1,2-benzenedicarboxylic acid, di-c6-8-branched alkyl esters, c7-rich, 1,6 hexanediol, 1-methoxy-2-propyl acetate, 1-pentanol, 2 метилбутан, 2,4-pentanedione, 2-(2-butoxyethoxy)ethanol, 2-methyl-3-butyn-2-ol, 2-methylpropanal, 3,7-dimethyl-6-octenal, 3-(diethylamino)cyclohex-3-enol, 3-methylbutanal, 4-butyrolactone, 7-methyltheophylline.
- Acetictracker, acetonperoxyd, acid compliant, acid compliant database, acid hydroxy, acid4, acido gluconico, adiponitrile, aerosoli, affald, aluminum chloride hydroxide sulfate, andningsmask asien, anglix, aphtiria, argirec, as4o6, aspirationsgefahr, astro chemicals, atmer 100, b2o3 chemical name, b2o3 name, background title, bas chemical name, benzeensulfonylchloride.
- Benzofenone, bexol, brandsläckning, bromométhane, butanox m50.
- C11h16o, c2h2cl4, c2h2f2, c2h6cl2si, c3h5o2, c3h9n, c5h11no, c6h16n2, c7h12o4, c8h4n2, cafeine.
- Canadian domestic substances list, cao chemical name, cas number, ccid, ccris, chem, chem hazard, chemical, chemical danger symbols, chemical free, chemical hazard pictograms, chemical hazard symbol, chemical hazard symbols, chemical hazard warning symbols, chemical hazards symbols, chemical names, chemical online, chemical pictograms, chemical portal, chemical substances, chemical substances portal, chemical symbol for propane, chemical symbols.
- Chemistry hazard symbols, chemistry lab hazard symbols, chemsub, chemsub online, child pictogram, chlorazene, chlorine chemical symbol, chloroéthane, chloroforme, chromedia, cianidrico, classifiable, classification of chemical substances lab, close to danger, clp ghs, clp pictogrammen, clp pictograms, coco and amid anal, corrosive hazard symbol.
- Couche alpha, crodamol, cu(oh)2, cyanurchlorid, cyclododecanone, cyclohexane dimethanol, cyclotetrasiloxane, cycocel extra, déchet, danger, danger chemical sign, danger hazard symbol, danger symbol, danger symbols, danger synonym, dangero, dangert, dauxona, decanoic acid methyl ester, dehp dinp, dehydrated alcohol, dichloor, dichloroisocyanuric acid, dimethyl stearamine, dimethylamine anhydrous, dinitrobenzol, dinp, dioxine.
- Dl-metionina, docusate sodium salt, dodecan, doodshoofd, dražilno, ec hazard symbol, ec hazard symbols, echa reach, el-hazard, endokrine disruptoren, environmental hazard sign, environmental hazard symbol, epinitril, et nu n, ethanamine, ethanthiol, ethyl chloroformate, etiqueta inflamable, eu danger symbols, eu ghs, european hazard symbols, extremadamente inflamable, eye pictogram, f symbol, f symbols, farligt avfall symbol, farosymbol.
- Fe2o3 chemical name, febrex, flammable ghs, fluorotrichloromethane, forbudt for børn, formalin iupac name, formamide, formic acid, fplus, free portal, free web portal, gaeilge phrases, gaisras, gefahrensymbol, gefahrensymbol giftig, gefahrensymbole, gefahrensymbole ghs, genklene, gesundheitsschädlich.
- Ghs, ghs 02, ghs 05, ghs 06, ghs 07, ghs 08, ghs 09, ghs chemical, ghs classification, ghs clp, ghs ethanol, ghs gefahrensymbole, ghs label for benzene, ghs labelling, ghs pictogram, ghs pictograms, ghs pictograms and hazard classes, ghs symbol, ghs symbole, ghs symbols, ghs01, ghs02, ghs03, ghs04, ghs05, ghs06, ghs07, ghs08, ghs09.
- Giftig symbol, global harmonisation system, globally harmonised system, globally harmonized system, globally harmonized system of classification and labeling of chemicals, gluconic acid, gluconsäure, glycocoll, glytrin spray, google bookmarks icon, handschoenen, harmful hazard symbol, hazard chemical symbols, hazard pictogram, hazard pictograms, hazard symbol, hazard symbols, hazardous symbol, hazardous symbols, helposti syttyvä.
- Hexenal, hpvis, hsno chemical classification information database, image xn, inademing, industrial hazard symbols, international hazard symbols, irritant hazard symbol, irritant symbol, irriterend, isobutyl, isodecanol, isotridecanol, iupac name for formaldehyde, iupac name for formalin, kaliummethanolat, lab safety symbols, laboratory chemical, laboratory hazard symbols, laboratory information system, lambang f, lastanox, latviesu valoda, lavarsi.
- Linolensäure, liquido inflamable, liquido inflamable 3, list.find, lithopone, loodet, lupersol, magnacide, man pictogram, mantra r11, methaanamine, methaanzuur, methanesulfonyl chloride, methanethiol, methyl ester, methyldiethanolamine, micosin f30, mierenzuur, milieugevaarlijk, monastral, msds fiche chloorazijnzuur, n°1 free online, natispray, natrii citras, new chemical hazard symbols, newscine, nirmin, nitora, nitradisc, nitriderm, nitrin, nitrine.
- Nitrobaat, nitrobenzol, nitrocellulose chemical formula, nitrocine, nitroderm, nitrodisc, nitrolingual akut spray, nitronal, nitropatch, nitropflaster, nitropropan, no ghs symbol, nocivo, nordic symbol, number 07, number 08, number 50, number 71, number 74, nzioc, octamethylcyclotetrasiloxan, ol pictogram, oleamide, online portal, online symbol, online.fr, palm oil chemical formula, pbo chemical name, pentaan, percutol, perlinganit, perturbateur, phenol, phlegmatizer, phosphoric ester.
- Phthalsäureester, pictogram fire, pictogram gevaar, pictogram licht ontvlambaar, pictogram niet roken, pictogramme danger, pictogramme produits chimiques, pictogrammen elektriciteit, pictogrammer børn, piktogram zákaz fajčiť, point d'exclamation, poleptanie, polychlorierte biphenyle, polychlorobiphényle, portal online free, portal pictogram, portal pictograms, portal symbol, potassium cyanate, potassium fatty acid, prasterone, promaxon, propane symbol, reach chemical list, reach echa.
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- Symbol n, symbol of danger, symbol of n, symbol t, symbol xi, symbol xn, symbole danger, symbole danger de mort, symbole dangereux, symbole de danger, symbole inflammable, symbole sécurité, symbole xn, symboles de danger, symbols of danger, system f, tete de mort en flamme, tete de mort totenkopf, tetrachlorodibenzodioxin, tetradecanoic acid, tilos a dohányzás tábla, Tous, toxic chemicals list, toxic hazard sign, toxic hazard symbol, toxic substances control act, toxicity system.
- Transderm nitro, trees reddit, trichlorosilane, tridil, triethylfosfaat, trinitrina, trinitroglicerina, trinitrol, trioxido de diantimonio, trisenox, tsca inventory, tsca inventory list, tsca list, tupakointi, umweltschutz pictograms, ureol, ureum, uvinul 3035, vie structure, voie cutanée, warning signs, waxsol, web pictogram, web portal, web portal free, web portal icon, web portal system, weed portal, witco chemical, www.xn.com, wykrzyknik, x n, xi, xi irritante, xi symbol, xn, xn symbol, xn-, zaščitne rokavice, zavrat.

 
 
NCI:
National Cancer Institute.

The National Cancer Institute (NCI) is a component of the National Institutes of Health (NIH), one of eight agencies that compose the Public Health Service (PHS) in the Department of Health and Human Services (DHHS).
The NCI, established under the National Cancer Institute Act of 1937, is the Federal Government's principal agency for cancer research and training. The National Cancer Act of 1971 broadened the scope and responsibilities of the NCI and created the National Cancer Program. Over the years, legislative amendments have maintained the NCI authorities and responsibilities and added new information dissemination mandates as well as a requirement to assess the incorporation of state-of-the-art cancer treatments into clinical practice.

The National Cancer Institute coordinates the National Cancer Program, which conducts and supports research, training, health information dissemination, and other programs with respect to the cause, diagnosis, prevention, and treatment of cancer, rehabilitation from cancer, and the continuing care of cancer patients and the families of cancer patients.
Specifically, the Institute:
- Supports and coordinates research projects conducted by universities, hospitals, research foundations, and businesses throughout this country and abroad through research grants and cooperative agreements.
- Conducts research in its own laboratories and clinics.
- Supports education and training in fundamental sciences and clinical disciplines for participation in basic and clinical research programs and treatment programs relating to cancer through career awards, training grants, and fellowships.
- Supports research projects in cancer control.
- Supports a national network of cancer centers.
- Collaborates with voluntary organizations and other national and foreign institutions engaged in cancer research and training activities.
- Encourages and coordinates cancer research by industrial concerns where such concerns evidence a particular capability for programmatic research.
- Collects and disseminates information on cancer.
- Supports construction of laboratories, clinics, and related facilities necessary for cancer research through the award of construction grants.
 
NDSL:
Non-Domestic Substances List.

Environment Canada has published and continues to maintain a Non-Domestic Substances List (NDSL).
This second publication is based on the United States Environmental Protection Agency's (USEPA) Toxic Substances Control Act (TSCA) Chemical Substances Inventory for 1985, and contains more than 58,000 entries. Substances that are not on the DSL but are listed on the NDSL are subject to lesser information requirements.

Updates to the NDSL:
Beginning in 1995, the NDSL has undergone annual revisions that have added or deleted all substances incorporated into, or removed from, the TSCA inventory five or more years before the date of the NDSL revision. The first NDSL update therefore included substances in the 1990 supplement of the TSCA inventory. Substances on the TSCA inventory that have restrictions imposed on their manufacture or import as a result of a risk assessment by the U.S. EPA are not being added to the NDSL.

Substances can be listed on the confidential NDSL only if the nominating company demonstrates that the substance exists on the confidential TSCA inventory and is not listed on any other public chemical Inventory.
 
NICNAS:
National Industrial Chemicals Notification and Assessment Scheme.

NICNAS is the Australian Government’s regulatory scheme for industrial chemicals. While it may not be a household name, the work of NICNAS’s officers is familiar to an ever-increasing number of Australians.

Established in 1990, NICNAS:
- Provides a national notification and assessment scheme to protect the health of the public, workers and the environment from the harmful effect of industrial chemicals; and
- Assesses all chemicals new to Australia and assesses those chemicals already used (existing chemicals) on a priority basis, in response to concerns about their safety on health and environmental grounds.
 
NLM:
National Library of Medicine.

The National Library of Medicine (NLM), on the campus of the National Institutes of Health in Bethesda, Maryland, is the world's largest medical library.
The Library collects materials in all areas of biomedicine and health care, as well as works on biomedical aspects of technology, the humanities, and the physical, life, and social sciences. The collections stand at more than 9 million items--books, journals, technical reports, manuscripts, microfilms, photographs and images. Housed within the Library is one of the world's finest medical history collections of old and rare medical works. The Library's collection may be consulted in the reading room or requested on interlibrary loan.
NLM is a national resource for all U.S. health science libraries through a National Network of Libraries of Medicine®.

For 125 years, the Library published the Index Medicus®, a monthly subject/author guide to articles in 4000 journals. This information, and much more, is today available in the database MEDLINE®, the major component of PubMed®, freely accessible via the World Wide Web. PubMed has more than 16 million MEDLINE journal article references and abstracts going back to the mid-1960's with another 1.5 million references back to the early 1950's.
NLM plans to add more references back through time.Other databases provide information on monographs (books), audiovisual materials, and on such specialized subjects as toxicology, environmental health, and molecular biology.

More information can be found on NLM web site: http://www.nlm.nih.gov/.
 
NLP:
No-Longer Polymers.

As polymers were not reportable and therefore not included in EINECS, in many cases it had to be decided whether a substance is a polymer or not by a desk examination of the submitted documents.

A widely used definition of polymers refers to the need for both a high molecular weight (more than 10.000) and a molecular weight distribution. In contrast, for decisions on the inclusion or otherwise in EINECS, the molecular weight of a substance was not taken into account.

Following the definition of the 7th Amendment a polymer is beside the molecular weight distribution also characterised "by the sequence of one or more types of monomer units and comprising a simple weight majority of molecules containing at least three monomer units which are covalently bound to at least one other monomer unit or other reactant and consists of less than a simple weight majority of molecules of the same molecular weight" (Directive 92/32/EEC, Art. 2, 1 c)).

The information available in the primary processing of substances reported for EINECS was not always sufficient to distinguish a polymer from a non polymer. In particular only the name and the CA registry number was known for substances reported on the A or B forms used for reporting. The first decision on whether a compound was a polymer or not had therefore to rely on the name and on the classification of the compounds in the Chemical Abstract Registry System. Whenever a substance based on the information available was suspected of being a polymer, a problem letter was issued, and the submitter was asked to supply more detailed information on the size and distribution of the molecular weight.

Therefore decisions taken for the inclusion of submitted substances in EINECS did not follow general rules without any exception. In some cases decisions were only based on the name of the submitted substance.
The no-longer polymer list contains only substances not included in EINECS. For legal reasons the definitions depend on the EINECS definitions and hence decisions on the notification status of e.g. a post-reacted NLP can be inferred by considering for this purpose an equivalence with EINECS rules. Further requests on declaration of substances as no-longer polymers have to be based on the rejection of a submission to EINECS (ref.: correspondence).

NLP-Nos and name descriptions take precedence. The CAS-No given are to be treated as indicative and for a use as a searching tool.
 
NOAEL:
No-Observed-Adverse-Effect Level.

Greatest concentration or amount of a substance determined by hypothesis testing, found by observation or experiment, which, in a given toxicity test, causes no observed detectable adverse effect. Effects may be detected at this level, which are not judged to be adverse.
 
NOEC:
No Observed Effect Concentration.

The No Observed Effect Concentration is the highest tested concentration at which, in a study, no statistically significant effect is observed in the exposed population compared with an appropriate control group.
 
NOEL:
No Observed Effect Level.

Greatest concentration or amount of a substance determined by hypothesis testing, found by observation or experiment, which in a given toxicity test causes no observed detectable effect.
 
Non phase-in substance:
A substance which is not a phase-in substance, in the meaning of Article 3.20. Those non-phase in substances do not benefit from the transitional regime provided for phase-in substances under REACH and therefore have to be registered before manufacture or import starts.
 
NONS:
Notification of New Substances.
 
Not chemically modified substance:
A substance whose chemical structure remains unchanged, even if it has undergone a chemical process or treatment, or a physical mineralogical transformation, for instance to remove impurities.
 
Notification:
The submission of specific information to the Agency in accordance with a legislative requirement.

The REACH Regulation requires actors in the supply chain (manufacturers, importers, downstream users) to submit the following types of notifications, under certain circumstances:
- Notification of a substance in an article
- Notification of classification and labelling
- Notification of substances for the purposes of product and process orientated research and development
- Notification by downstream user of use within the conditions of authorisation granted to an actor up his supply chain
- Notification of restart of use by downstream user
Notification may also refer to substances notified under Dir. 67/548/EEC.
 
Notified substance:
A substance for which a notification has been submitted and which could be placed on the market in accordance with Directive 67/548/EEC. Notified subtances also used to be termed "New Substances".
 
NPV:
Negative Predicitive Value.
 
NTP:
National Toxicology Program (U.S.).

This program is part of the United States Department of Health and Human Services. The NTP has a large program for testing the potential carcinogenicity of chemicals. It also does many other types of studies on short-term and long-term health effects.
 
Nuisance Dust, Nuisance Particulate:
Nuisance particulate is a term used historically by the ACGIH (American Conference of Governmental Industrial Hygienists) to describe airborne materials (solids and liquids) which have little harmful effect on the lungs and do not produce significant disease or harmful effects when exposures are kept under reasonable control. Nuisance particulates may also be called nuisance dusts. High levels of nuisance particulates in the air may reduce visibility and can get into the eyes, ears and nose. Removal of this material by washing or rubbing may cause irritation. (Also see Particulates Not Otherwise Classified).
 
NZIoC:
New Zealand Inventory of Chemicals.

The NZIoC is a database of all the hazardous chemical components of products approved under group standards.

Many group standards require the hazardous components of products covered under these approvals to be listed on the NZIoC. If you have a new product, you can check whether you comply with the group standard condition.

More information can be found on the New Zealand's Environmental Protection Authority (EPA) web site: http://www.epa.govt.nz/.
 
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