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european community number wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 structure 2 ec inventory 3 list numbers 4 see also 5 references 6 external links toggle the table of contents european community number 24 languages العربية বাংলা català čeština deutsch ελληνικά فارسی suomi français galego bahasa indonesia 日本語 한국어 македонски bahasa melayu nederlands norsk bokmål polski русский srpskohrvatski српскохрватски српски srpski svenska українська 中文 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia identifier for substance regulated within eu the european community number ec number is a unique seven digit identifier that was assigned to substances for regulatory purposes within the european union by the european commission the ec inventory comprises three individual inventories einecs elincs and the nlp list 1 european inventory of existing commercial chemical substances einecs structure edit the ec number may be written in a general form as nnn nnn r 2 where the n represents digits and r is a check digit the check digit is calculated using the isbn method according to this method the check digit r is the following sum modulo 11 r n 1 2 n 2 3 n 3 4 n 4 5 n 5 6 n 6 mod 1 1 displaystyle r n_ 1 2n_ 2 3n_ 3 4n_ 4 5n_ 5 6n_ 6 bmod 1 1 if the remainder r is equal to 10 that combination of digits is not used for an ec number to illustrate the ec number of dexamethasone is 200 003 9 n 1 is 2 n 2 through n 5 are 0 and n 6 is 3 2 2 0 3 0 4 0 5 0 6 3 11 20 11 1 9 11 displaystyle frac 2 2 times 0 3 times 0 4 times 0 5 times 0 6 times 3 11 frac 20 11 1 frac 9 11 the remainder is 9 which is the check digit there is a set of 181 elincs numbers ec numbers starting with 4 for which the checksum by the above algorithm is 10 and the number has not been skipped but issued with a checksum of 1 ec inventory edit the ec inventory includes the substances in the following inventories the content of these inventories is fixed and official inventory scope format number of entries if fixed number of entries european inventory of existing commercial chemical substances einecs substances excluding polymers that were recorded as being commercially available in the eu from 1 january 1971 to 18 september 1981 3 these were considered registered under article 8 1 of the dangerous substances directive 67 548 eec they are considered phase in substances under the reach regulation 2xx xxx x 3xx xxx x 100 102 3 european list of notified chemical substances elincs substances notified under the dangerous substances directive notification of new substances nons that became commercially available after 18 september 1981 citation needed 4xx xxx x 4 381 no longer polymers nlp the definition of polymers was changed in april 1992 4 with the result that substances previously considered to be polymers were no longer regarded as polymers consequently a list called the nlp list no longer polymer was made of such substances that were not covered by the polymer definition but were placed on the market between after 18 september 1981 and 31 october 1993 5 5xx xxx x 703 list numbers edit the european chemicals agency echa applies a format similar to the ec number to what it calls list number 6 the number is assigned under the reach and clp regulations without being legally recognised they are not considered official identifiers because they have not been published in the official journal of the european union list numbers are administrative tools and shall not be used for any official purposes list numbers have alphanumerical format and same length as ec numbers xxx xxx x a list number assigned by echa starts with 1 6 7 8 9 or a letter 7 earlier list numbers shared the same format with ec numbers however as numbers in that format ran out at the end of 2025 the list number format became alphanumerical the new format retains the same length but begins with a letter instead of a digit once all letters in alphabetical order have been used as the first character the second character will become a letter and so on list numbers assigned before the format change in december 2025 will remain unchangedstay and are not affected by the new format see also edit registration evaluation authorisation and restriction of chemicals european chemical substances information system cas registry number references edit guidance for identification and naming of substances under reach and clp pdf european chemicals agency may 2017 p 106 archived from the original pdf on 2017 08 28 retrieved 2017 08 28 commission directive 2001 59 ec of 6 august 2001 adapting to technical progress for the 28th time council directive 67 548 eec on the approximation of the laws regulations and administrative provisions relating to the classification packaging and labelling of dangerous substances pdf official journal of the european communities l 225 european commission 4 21 august 2001 retrieved 2011 12 18 1 2 geiss f del bino g blech g nørager o orthmann e mosselmans g powell j roy r smyrniotis t town w g 1992 the einecs inventory of existing chemical substances on the ec market toxicological environmental chemistry 37 1 2 21 33 doi 10 1080 02772249209357850 council directive 92 32 eec of 30 april 1992 amending for the seventh time directive 67 548 eec on the approximation of the laws regulations and administrative provisions relating to the classification packaging and labelling of dangerous substances pdf official journal of the european communities l 154 european commission 1 29 30 april 1992 retrieved 2009 01 25 regulation ec no 1272 2008 of the european parliament and of the council of 16 december 2008 on classification labeling and packaging of substances and mixtures amending and repealing directives 67 548 eec and 1999 45 ec and amending regulation ec no 1907 2006 pdf official journal of the european communities l 353 european commission 329 december 31 2008 retrieved 2009 01 24 registered substances archived 2011 12 05 at the wayback machine at european chemicals agency echa about ec and list numbers echa retrieved 2026 01 23 external links edit wikidata has the property ec number p232 see uses retrieved from https en wikipedia org w index php title european_community_number oldid 1349692151 categories chemical numbering schemes european union law regulation of chemicals in the european union hidden categories articles with short description short description is different from wikidata all articles with unsourced statements articles with unsourced statements from july 2009 webarchive template wayback links this page was last edited on 18 april 2026 at 13 46 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents european community number 24 languages add topic