Property talk:P657

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RTECS number
chemical identifier from the Registry of Toxic Effects of Chemical Substances

Description	RTECS number (Registry of Toxic Effects of Chemical Substances (Q754938))
Applicable "stated in" value	Registry of Toxic Effects of Chemical Substances (Q754938)
Data type	External identifier
Template parameter	Template:Chembox (Q52426) en: RTECS
Domain	chemical substance (Q79529), more specifically chemical compound (Q11173) (note: this should be moved to the property statements)
Allowed values	[A-Z]{2}\d{7}
Example	According to this template: see Wikidata:Chemistry_task_force/Properties. lithium citrate (Q2351742) = "TZ8616000" According to statements in the property: beryllium (Q569) → DS1750000 ethanol (Q153) → KQ6300000 When possible, data should only be stored as statements
Source	http://www.cdc.gov/niosh/npg/npgdrtec.html
Tracking: usage	Category:Pages using Wikidata property P657 (Q26250052)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other external identifier Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Chart by item creation date Database reports/Constraint violations/P657 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 1,718 Main statement 1,715 99.8% of uses Qualifier 3 0.2% of uses
Search for values

[create Create a translatable help page (preferably in English) for this property to be included here]

Format “[A-Z][A-Z]\d{7}”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P657#Format, hourly updated report, SPARQL

Distinct values: this property likely contains a value that is different from all other items. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P657#Unique value, SPARQL (every item), SPARQL (by value)

Single value: this property generally contains a single value. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P657#Single value, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P657#Entity types

This property is being used by: ru:Шаблон:Изомеры ru:Шаблон:Вещество ar:قالب:معلومات كيمياء -معرفات, ar:قالب:معلومات كيمياء -معرفات/ملعب, ar:قالب:معلومات كيمياء - معرفات/ملعب be:Шаблон:Рэчыва es:Plantilla:Ficha de compuesto químico, es:Plantilla:Ficha de compuesto químico/pruebas2 hy:Կաղապար:Տեղեկաքարտ Նյութ tt:Калып:Матдә2 be-x-old:Шаблён:Рэчыва tg:Шаблон:Моддаи кимиёӣ uk:Шаблон:Речовина Ідентифікатори ca:Plantilla:Identificadors química be-tarask:Шаблён:Рэчыва Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

Source for data

See here for the list of RTECS numbers. use this website to source the data. Snipre (talk) 11:46, 29 June 2013 (UTC)