Substance Information

The REACH registered substance data and the C&L Inventory portal will be upgraded from the 9th November.

Please be aware there may be intermittent unavailability while work in ongoing. The per substance REACH registration status will be made available as soon as possible thereafter. Likewise the per substance indication of harmonised C&L, Seveso directive, or notified C&L regulatory context will be made available as soon as possible.

Please note that it may take a week or two to have everything fully in place, and please be aware in the meantime that the Registration status may be incorrect and the CLP regulatory context may be incompletely shown.

Substance Infocard


salts of hydrogen cyanide with the exception of complex cyanides such as ferrocyanides, ferricyanides and mercuric oxycyanide and those specified elsewhere in this Annex

Help Substance identity

The ‘Substance identity’ section is calculated from substance identification information from all ECHA databases. The substance identifiers displayed in the InfoCard are the best available substance name, EC number, CAS number and/or the molecular and structural formulas.

Some substance identifiers may have been claimed confidential, or may not have been provided, and therefore not be displayed.

EC (European Community) Number

The EC Number is the numerical identifier for substances in the EC Inventory. The EC Inventory is a combination of three independent European lists of substances from the previous EU chemicals regulatory frameworks (EINECS, ELINCS and the NLP-list). More information about the EC Inventory can be found here.

If the substance was not covered by the EC Inventory, ECHA attributes a list number in the same format, starting with the numbers 6, 7, 8 or 9.

The EC or list number is the primary substance identifier used by ECHA.

CAS (Chemical Abstract Service) registry number

The CAS number is the substance numerical identifier assigned by the Chemical Abstracts Service, a division of the American Chemical Society, to substances registered in the CAS registry database. A substance identified primarily by an EC or list number may be linked with more than one CAS number, or with CAS numbers that have been deleted. More information about CAS and the CAS registry can be found here.

Molecular formula

The molecular formula identifies each type of element by its chemical symbol and identifies the number of atoms of each element found in one discrete molecule of the substance. This information is only displayed if the substance is well–defined, its identity is not claimed confidential and there is sufficient information available in ECHA’s databases for ECHA’s algorithms to generate a molecular structure.

Molecular structure

The molecular structure is based on structures generated from information available in ECHA’s databases. If generated, an InChI string will also be generated and made available for searching. This information is only displayed if the substance is well-defined, its identity is not claimed confidential and there is sufficient information available in ECHA’s databases for ECHA’s algorithms to generate a molecular structure.

More help available here.

EC / List no.: -

CAS no.: -

Mol. formula:

Help Hazard classification and labelling

The ‘Hazard classification and labelling’ section shows the hazards of a substance based on the standardised system of statements and pictograms established under the CLP (Classification Labelling and Packaging) Regulation. The CLP Regulation makes sure that the hazards presented by chemicals are clearly communicated to workers and consumers in the European Union. The CLP Regulation uses the UN Global Harmonised System (GHS) and European Union Specific Hazard Statements (EUH).

This section is based on three sources for information (harmonised classification and labelling (CLH), REACH registrations and CLP notifications). The source of the information is mentioned in the introductory sentence of the hazard statements. When information is available in all sources, the first two are displayed as a priority.

Please note:

The purpose of the information provided under this section is to highlight the substance hazardousness in a readable format. It does not represent a new labelling, classification or hazard statement, neither reflect other factors that affect the susceptibility of the effects described, such as duration of exposure or substance concentration (e.g. in case of consumer and professional uses). Other relevant information includes the following:

  • Substances may have impurities and additives that lead to different classifications. If at least one company has indicated that the substance classification is affected by impurities or additives, this will be indicated by an informative sentence. However, substance notifications in the InfoCard are aggregated independently of the impurities and additives.
  • Hazard statements were adapted to improve readability and may not correspond textually to the hazard statements codes description in the European Union Specific Hazard Statements (EUH) or the UN Global Harmonised System (GHS).

To see the full list of notified classifications and to get more information on impurities and additives relevant to classification please consult the C&L Inventory.

More information about Classification and Labelling is available in the Regulations section of ECHA website.

More help available here.

Harmonised classification and labelling (CLH)

Harmonised classification and labelling is a legally binding classification and labelling for a substance, agreed at European Community level. Harmonisation is based on the substance’s physical, toxicological and eco-toxicological hazard assessment.

The ‘Hazard classification’ and labelling section uses the signal word, pictogram(s) and hazard statements of the substance under the harmonised classification and labelling (CLH) as its primary source of information.

If the substance is covered by more than one CLH entry (e.g. disodium tetraborate EC no. 215–540–4, is covered by three harmonisations: 005–011–00–4; 005–011–01–1 and 005–011–02–9), CLH information cannot be displayed in the InfoCard as the difference between the CLH classifications requires manual interpretation or verification. If a substance is classified under multiple CLH entries, a link to the C&L Inventory is provided to allow users to view CLH information associated with the substance and no text is automatically generated for the InfoCard.

It is possible that a harmonisation is introduced through an amendment to the CLP Regulation. In that case, the ATP (Adaptation to Technical Progress) number is displayed.

More info on CLH can be found here.

Classification and labelling under REACH

If available, additional information on classification and labelling (C&L) is derived from REACH registration dossiers submitted by industry. This information has not been reviewed or verified by ECHA, and may change without prior notice. REACH registration dossiers have greater data requirements (such as supporting studies) than do notifications under CLP.

Notifications under the Classification Labelling and Packaging (CLP) Regulation

If no EU harmonised classification and labelling exists and the substance was not registered under REACH, information derived from classification and labelling (C&L) notifications to ECHA under CLP Regulation is displayed under this section. These notifications can be provided by manufacturers, importers and downstream users. ECHA maintains the C&L Inventory, but does not review or verify the accuracy of the information.

Note that for readability purposes, only the pictograms, signal words and hazard statements referred in more than 5% of the notifications under CLP are displayed.

GHS06: Acute Toxicity GHS09: Hazardous to the Environment

Danger! According to the harmonised classification and labelling (ATP01) approved by the European Union, this substance is fatal if swallowed, is fatal in contact with skin, is fatal if inhaled, is very toxic to aquatic life and is very toxic to aquatic life with long lasting effects.

about INFOCARD - Last updated: 18/03/2020 InfoCard

The InfoCard summarises the non-confidential data of a substance held in the databases of the European Chemicals Agency (ECHA). InfoCards are generated automatically based on the data available at the time of generation.

The quality and correctness of the information submitted to ECHA remains the responsibility of the data submitter. The type of uses and classifications may vary between different submissions to ECHA and for a full understanding it is recommended to consult the source data. Information on applicable regulatory frameworks is also automatically generated and may not be complete or up to date. It is the responsibility of the substance manufacturers and importers to consult official publications, e.g. the electronic edition of the Official Journal of the European Union.

InfoCards are updated when new information is available. The date of the last update corresponds to the publication date of the InfoCard and not necessarily to the date in which the update occurred in the source data.

More help available here.

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Key datasets

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Regulatory context

Here you can find all of the regulations and regulatory lists in which this substance appears, according to the data available to ECHA. This substance has been found in the following regulatory activities (directly, or inheriting the regulatory context of a parent substance):

CLP - Classification, Labelling and Packaging
  • Harmonized C&L
    CLP Regulation Annex VI
    Substances for which an agreed set of classification and labelling data has been agreed at EU level by Member States.
  • Seveso Annex I
    Seveso III Directive Annex I
    Substances for which industrial accident prevention and reporting requirements have been established.
CAD - Chemical Agents Directive
  • CAD - Chemical Agents Directive, Art. 2(b)(i) - Hazardous Agents
    EU. Hazardous Substances - Art. 2(b)(i), Directive 98/24/EC on Protection of Workers from Chemical Agent-related Risks, 5 May 1998 (Table 3 of Annex VI to CLP, as amended)

    This list represents a calculated inventory of substances based on the list of harmonized substances contained in Table 3 of Annex VI to the CLP Regulation (1272/2008/EC). Note that this list is not exhaustive. While the harmonized list covers many hazardous substances, other ones not listed may also meet the classification criteria in accordance with the CLP.

EU Ecolabel Regulation
  • EU Ecolabels - Restrictions for Hazardous Substances/Mixtures
    EU. Substances Rendering Goods Ineligible for EU Ecolabel, Art. 6(6), Reg. 66/2010/EC, L 27/1, 30 Jan 2010 (T. 3 of Anx VI to CLP; Candidate List of SVHCs)

    This database contains: (1) the list of hazardous substances harmonized for classification and labeling in EU (i.e. Table 3 of Annex VI to CLP Regulation); and (2) the Candidate List of substances of very high concern (SVHC). The EU Ecolabel may not be awarded to substances or mixtures classified as such. Note that this list is not exhaustive. While the harmonized list covers many hazardous substances, other ones not listed may also meet the classification criteria in accordance with the CLP.

Protection of Young People Directive
  • Physical, Biological and Chemical Agents & Processes and Work
    EU. Non-Exhaustive List of Banned Substances, Directive 94/33/EC on Young People at Work, 20 August 1994, as amended by Dir 2014/27/EU, March 5, 2014 (Based on Table 3 of Annex VI to CLP, inter alia)

    This list contains biological and chemical agents, in accordance with Art. 7 and points 2 and 3 of the Annex to Directive 94/33/EC, to which young persons (under 18 years of age) may not be exposed at the workplace. The database represents a non-exhaustive list of such substances based on: 1) agents of risk groups 3 and 4 under Directive 2000/54/EC; 2) Table 3 of Annex VI to the CLP Regulation; 3) and Annex I of Directive 2004/37/EC.

Safety and/or Health Signs at Work Directive
  • Workplace Signs - minimum requirements & signs on containers and pipes
    EU. Workplace Signage: Annexes I and III, Directive 92/58/EEC, last amended by Directive 2014/27/EU, 5 March 2014

    This directive requires employers to ensure proper signage is posted in areas where hazards cannot be avoided or reduced. The annexes to this directive provide detailed information about the minimum requirements for all safety and health signs. According to the annexes to the directive, storage areas and containers containing chemical substances or mixtures that are classified as hazardous according to the CLP Regulation (1272/2008/EC) must be marked and/or labeled.

WFD - Waste Framework Directive
  • Waste Framework Directive, Annex III - Waste - Hazardous Properties
    EU. Substances according to Hazardous Waste Properties: Annex III, Directive 2008/98/EC, 22 November 2008, amended by Directive 2018/851/EU, 14 June 2018

    This database contains substances that have been assigned hazard property (HP) waste codes 1-15, as defined in terms of the hazard class & category, hazard (H) statement, and/or concentration limits provided in Annex III of the Waste Framework Directive (2008/98/EC). The classifications of the substances listed in the database are based on their harmonized classifications per Table 3 of Annex VI to the CLP Regulation (1272/2008/EC).

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Substance names and other identifiers

Regulatory process names
salts of hydrogen cyanide with the exception of complex cyanides such as ferrocyanides, ferricyanides and mercuric oxycyanide and those specified elsewhere in this Annex
C&L Inventory, Other, CAD - Chemical Agents Directive, Art. 2(b)(i) - Hazardous Agents, EU Ecolabels - Restrictions for Hazardous Substances/Mixtures, Workplace Signs - minimum requirements & signs on containers and pipes, Waste Framework Directive, Annex III - Waste - Hazardous Properties, Fertiliser Regulation- Annex I, E.3 (chelating and complexing agents)
Translated names
ciānūdeņražskābes sāļi, izņemot kompleksos cianīdus, piemēram, ferrocianīdus, ferricianīdus un dzīvsudraba oksicianīdu, un tos, kas norādīti citur šajā pielikumā (lv)
C&L Inventory
hidrogén-cianid sói (kivéve a komplex cianidokat, mint például a ferro-cianidokat, ferri-cianidokat és higany-oxicianidokat, továbbá az e mellékletben külön szereplő vegyületeket) (hu)
C&L Inventory
hydrogencyanidsalter, unntatt komplekse cyanider som ferrocyanider, ferricyanider og kvikksølvoksycyanid og cyanider som er nevnt andre steder i listen (no)
C&L Inventory
imluħ taċ-ċjanur tal-idroġenu bl-eċċezzjoni ta' ċjanuri kumplessi bħal pereżempju ferroċjanuri, ferriċjanuri u ossiċjanur merkuriku u dawk speċifikati x'imkien ieħor f'dan l-Anness (mt)
C&L Inventory
sais do ácido cianídrico, com excepçaõ dos cianetos complexos tais como ferrocianetos, ferricianetos e oxicianeto de mercúrio (pt)
C&L Inventory
sales del ácido cianhídrico, excepto los cianuros complejos, tales como los ferrocianuros y ferricianuros y oxicianuro de mercurio (es)
C&L Inventory
sali dell'acido cianidrico, ad esclusione dei cianuri complessi come ferrocianuri e ferricianuri e ossicianuro di Hg e quelli espressamente indicati nel presente allegato (it)
C&L Inventory
salte af hydrogencyanid med undtagelse af komplekse salte som cyanoferrat (II) og-(III) og kviksølv(II)oxidcyanid (da)
C&L Inventory
salter av vätecyanid med undantag av komplexa cyanider som ferrocyanider, ferricyanider och kvicksilveroxicyanid (sv)
C&L Inventory
Salze der Blausäure mit Ausnahme der komplexen Cyanide, z. B. Cyanoferrate (II) und (III) und Quecksilberoxidcyanid und den namentlich in diesem Anhang bezeichneten. (de)
C&L Inventory
sels de cyanure d'hydrogène à l'exception des cyanures complexes tels que les ferrocyanures, les cyanures ferriques et l'oxycyanure mercurique et de ceux spécifiés ailleurs dans la présente annexe (fr)
C&L Inventory
sole cyjanowodoru z wyjątkiem kompleksów cyjankowych, takich jak heksacyjanożelaziany(II) i heksacyjanożelaziany(III) oraz tlenocyjanku rtęci(II) oraz związków wymienionych w innym miejscu niniejszego załącznika (pl)
C&L Inventory
soli kyanovodíka okrem komplexných kyanidov, ako sú hexakyanoželeznatany, hexakyanoželezitany a dikyanid-oxid ortuťnatý a tých, ktoré sú špecifikované inde v tejto prílohe (sk)
C&L Inventory
soli kyanovodíku (kyanidy), s výjimkou komplexních kyanidů, jako jsou hexakyanoželeznatany (ferrokyanidy), hexakyanoželezitany (ferrikyanidy) a oxykyanid (kyanid-oxidu) rtuťnatého, a těch, které jsou uvedeny jinde v této příloze (cs)
C&L Inventory
soli vodikovega cianida, razen kompleksnih cianidov, kot so ferocianidi, fericianidi in živosrebrov oksicianid, ter tistih, ki so navedene drugje v tej prilogi (sl)
C&L Inventory
soli vodikovog cianida s iznimkom kompleksnih cianida kao što su željezo(II)cianidi, željezo(III)cianidi i živini oksicianidi kao i oni koji su navedeni drugdje u ovom prilogu (hr)
C&L Inventory
syaanivetyhapon suolat lukuunottamatta kompleksisia syanideja kuten ferrosyanidit, ferrisyanidit ja elohopeaoksisyanidi (fi)
C&L Inventory
sărurile acidului cianhidric, cu exceptia cianurilor complexe cum ar fi ferocianurile, fericianurile si oxicianura de mercur, si a celor specificate în altă parte în prezenta anexă (ro)
C&L Inventory
vandenilio cianido druskos, išskyrus cianidų kompleksus, pavyzdžiui, ferocianidus, fericianidus bei gyvsidabrio oksocianidą ir nurodytuosius kitose šio priedo vietose (lt)
C&L Inventory
vesiniktsüaniidi soolad, välja arvatud komplekstsüaniidid, näiteks ferrotsüaniidid, ferritsüaniidid ja elavhõbeoksütsüaniid ning mujal käesolevas lisas määratletud tsüaniidid (et)
C&L Inventory
zouten van cyaanwaterstof met uitzondering van complexe cyaniden zoals ferro- en ferricyaniden en kwikoxycyanide (nl)
C&L Inventory
άλατα υδροκυανίου εκτός από τα σύμπλοκα κυανιούχα όπως τα σιδηροκυανιούχα, σιδηρικυανιούχα και οξυκυανιούχος υδράργυρος και όσα άλλα αναφέρονται αλλού στο εν λόγω Παράρτημα (el)
C&L Inventory
соли на хидроген цианид (циановодород) с изключение на комплексни цианиди като фероцианиди, ферицианиди и живачен оксицианид и тези, посочени на други места в това приложение (bg)
C&L Inventory
Other identifiers
C&L Inventory
Index Number

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