Substance Information

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REACH Registration data can be found in the new ECHA CHEM database. The old ‘Registered substance factsheets’ will be available on this web site during the transition period but have not been updated since 19 May 2023. More

 

Substance Infocard

IC

Molybdenum

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.: 231-107-2

CAS no.: 7439-98-7

Mol. formula: Mo

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.

According to the notifications provided by companies to ECHA in REACH registrations no hazards have been classified.

Helpful information About this substance

This section provides an overview of the calculated volume at which the substance is manufactured or imported to the European Economic Area (EU28 + Iceland, Liechtenstein and Norway). Additionally, if available, information on the use of the substance and how consumers and workers are likely to be exposed to it can also be displayed here.

The use information is displayed per substance life cycle stage (consumer use, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites or in manufacturing). The information is aggregated from the data coming from REACH substance registrations provided by industry.

For a detailed overview on identified uses and environmental releases, please consult the registered substance factsheet.

Use descriptors are adapted from ECHA guidance to improve readability and may not correspond textually to descriptor codes described in Chapter R.12: Use Descriptor system of ECHA Guidance on information requirements and chemical safety assessment.

The examples provided are generic examples and may not apply to the specific substance you are viewing. A substance may have its use restricted to certain articles or products and therefore not all the examples may apply to the specific substance. Furthermore, some substances can be found in an article, but with unlikely exposure (e.g. inside a watch) or with very low concentrations considered not to pose risks to human health or the environment.

Please note:

For readability purpose, only non-confidential use descriptors occurring in more than 5% of total occurrences are displayed.

The described Product category (i.e. the products in which the substance may be used) may refer to uses as intermediate and under controlled conditions, for which there is no consumer exposure.

More help is available here.

This substance is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 10 000 to < 100 000 tonnes per annum.

This substance is used by consumers, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites and in manufacturing.

Consumer Uses

This substance is used in the following products: welding & soldering products and metals.
Other release to the environment of this substance is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners), outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials) and outdoor use resulting in inclusion into or onto a materials (e.g. binding agent in paints and coatings or adhesives).

Article service life

Release to the environment of this substance can occur from industrial use: in the production of articles, industrial abrasion processing with low release rate (e.g. cutting of textile, cutting, machining or grinding of metal), industrial abrasion processing with high release rate (e.g. sanding operations or paint stripping by shot-blasting), formulation in materials, manufacturing of the substance and formulation of mixtures.
Other release to the environment of this substance is likely to occur from: outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials) and indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment).
This substance can be found in complex articles, with no release intended: vehicles, machinery, mechanical appliances and electrical/electronic products (e.g. computers, cameras, lamps, refrigerators, washing machines) and electrical batteries and accumulators.
This substance can be found in products with material based on: metal (e.g. cutlery, pots, toys, jewellery).

Widespread uses by professional workers

This substance is used in the following products: welding & soldering products, metals and laboratory chemicals.
This substance is used for the manufacture of: fabricated metal products, chemicals, metals and machinery and vehicles.
Other release to the environment of this substance is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners), outdoor use and outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials).

Formulation or re-packing

This substance is used in the following products: metals and pH regulators and water treatment products.
This substance has an industrial use resulting in manufacture of another substance (use of intermediates).
Release to the environment of this substance can occur from industrial use: formulation in materials, formulation of mixtures, in the production of articles, manufacturing of the substance and industrial abrasion processing with low release rate (e.g. cutting of textile, cutting, machining or grinding of metal).
Other release to the environment of this substance is likely to occur from: outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials).

Uses at industrial sites

This substance is used in the following products: metals, welding & soldering products, metal surface treatment products, coating products, non-metal-surface treatment products and pH regulators and water treatment products.
This substance has an industrial use resulting in manufacture of another substance (use of intermediates).
This substance is used in the following areas: formulation of mixtures and/or re-packaging.
This substance is used for the manufacture of: metals, machinery and vehicles, fabricated metal products, chemicals and electrical, electronic and optical equipment.
Release to the environment of this substance can occur from industrial use: in the production of articles, formulation in materials, of substances in closed systems with minimal release, manufacturing of the substance and as an intermediate step in further manufacturing of another substance (use of intermediates).

Manufacture

Release to the environment of this substance can occur from industrial use: manufacturing of the substance, formulation in materials, in the production of articles, industrial abrasion processing with low release rate (e.g. cutting of textile, cutting, machining or grinding of metal) and industrial abrasion processing with high release rate (e.g. sanding operations or paint stripping by shot-blasting).
Other release to the environment of this substance is likely to occur from: outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials) and indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment).

Help How to use it safely

This section provides links to the list of precautions (precautionary statements) and to the guidance on safe use, if they have been provided in REACH registration dossiers.

  • Precautionary statements - describe recommended measures to minimise or prevent adverse effects resulting from exposure to a hazardous product or improper storage or handling of a hazardous product.
  • Guidance on safe use - recommendations by substance registrant on the proper use of the substance in various situations. Examples include recommended measures on fire-fighting, transport and recycling and disposal.

Please note: Precautionary measures and guidance on safe use concern the use and handling of the specific substance as such, not of the presence of the substance in other articles or mixtures. The precautionary measures and guidance on safe use are as submitted to ECHA by registrants under the REACH Regulation. Information on precautionary measures and the safe use is submitted by the registrant of a substance and the registrant is solely responsible for its accuracy and completeness.

More help available here.

about INFOCARD - Last updated: 03/04/2023 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.

Help Help

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):

REACH - Registration, Evaluation, Authorisation and Restriction of Chemicals Regulation
CLP - Classification, Labelling and Packaging
  • Substances for which classification and labeling data have been submitted to ECHA in a registration under REACH or notified by manufacturers or importers under CLP. Such notifications are required for hazardous substances, as such or in mixtures, as well as for all substances subject to registration, regardless of their hazard.
Previous Legislations
  • Substances listed in the EINECS, ELINCS, or NLP inventories.
Fertilisers Regulation-repealed
  • Fertilisers Regulation, Annex I, E.2.1, E.2.2 and E.2.3
    EU. EC Fertiliser Type List, Annex I E.2.1-3: inorganic micro-nutrient fertilisers minimum content, Regulation 2003/2003/EC, amended by Regulation 2019/1102/EU, 28 June 2019

    This list contains Annex I fertiliser types according to their specific characteristics. Regulation 2003/2003/EC consolidates all European Union rules that apply to fertilisers, and ensures that the technical requirements it outlines are implemented uniformly. The Regulation only applies to mineral fertilisers consisting of one or more plant nutrients. Regulation 2003/2003/EC has been repealed with effect from 16 July 2022 by Regulation 2019/1009/EU.

Fertilising Products Regulation
  • Fertilising Products Regulation, Annex III, Part II-Labelling
    EU. EU Fertilising Products, Labelling regarding boron, cobalt, iron, manganese, molybdenum, copper and zinc, Annex III, Part II, Regulation (EU) 2019/1009, as amended by Reg 2021/1768, 8 October 2021

    The list contains labelling requirements for a given Product Function Category (PFC), and respective subcategories, related to the content of micronutrients boron (B), cobalt (Co), iron (Fe), manganese (Mn), molybdenum (Mo), Copper (Cu) and Zinc (Zn). The list is based on Annex III, Part II. The list is not exhaustive – for detailed labelling requirements please refer to the text of Regulation (EU) No 2019/1009.

Help Help

Substance names and other identifiers

Regulatory process names
Molybdenum
EC Inventory, Other
Molybdenum
Fertilising Products Regulation, Annex III, Part II-Labelling, Other
molybdenum
Pre-Registration process, Other
Molybdenum (Mo)
Fertilisers Regulation, Annex I, E.2.1, E.2.2 and E.2.3
IUPAC names
Elemental Molybdenum in Alloy Powder. JS
Registration dossier
Mo
C&L Inventory
Mo
Registration dossier
molybden
C&L Inventory
molybdenium
C&L Inventory
MOLYBDENUM
C&L Inventory, Registration dossier, Other
Molybdenum
C&L Inventory, Registration dossier, Other
molybdenum
C&L Inventory, Registration dossier, Other
Molybdenum
Registration dossier, Other
molybdenum
Registration dossier, Other
Molybdenum (Mo)
Registration dossier
Molybdenum in alloys
Registration dossier
Molybdenum metal
C&L Inventory
Molybdenum Metal
Registration dossier
Molybdenum metal
Registration dossier
Molybdenum metal and molybdenum in alloys
Registration dossier
Molybdenum metal in ferroalloyMolybdenum in FerromolybdenMolybdenum in iron-molybdenum metal alloy
Registration dossier
molybdenum(2+)
C&L Inventory, Registration dossier
Molybdenum, elemental
Registration dossier
Molybdenum, metal and insoluble compounds
C&L Inventory
molybdenurm
C&L Inventory
Molybdän
C&L Inventory
Trade names
Agglomerated Powder
Registration dossier
Distaloy AB, Distaloy AE, Distaloy AF, Distaloy SA, Distaloy SE, Distaloy 007, Astaloy 4Ni
Registration dossier
EM1
Registration dossier
EM2
Registration dossier
EM3
Registration dossier
Engineering steel
Registration dossier
FeMo - Ferro Molybdenum
Registration dossier
Ferro molybdenum
Registration dossier
FM1
Registration dossier
FM2
Registration dossier
FM3
Registration dossier
High Speed Steel
Registration dossier
LTS
Registration dossier
Metall (Mo Metall)
Registration dossier
MM1
Registration dossier
MM10
Registration dossier
MM2
Registration dossier
MM3
Registration dossier
Mo Metal
Registration dossier
Mo metal
Registration dossier
Molybdenum
Registration dossier
molybdenum
Registration dossier
Molybdenum (metal)
Registration dossier
Molybdenum Engineered
Registration dossier
Molybdenum Metal
Registration dossier
Molybdenum Metal Pellets
Registration dossier
Molybdenum Metal Powder
Registration dossier
Molybdenum Spray Dry
Registration dossier
MONA
Registration dossier
Powder
Registration dossier
Stainless steel
Registration dossier
Steel for Tooling (5% Cr)
Registration dossier
TM3
Registration dossier
Tool Steel
Registration dossier
Other identifiers
7439-98-7
EC Inventory, C&L Inventory, Registration dossier, Pre-Registration process, Fertilisers Regulation, Annex I, E.2.1, E.2.2 and E.2.3, Fertilising Products Regulation, Annex III, Part II-Labelling, Other
CAS number