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CAS 7783-40-6

CAS 7783-40-6 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 7783-40-6
CAS 7783-40-6PubChem CID 24546

Magnesium fluoride

Sellaite is a mineral with formula of MgF2. The IMA symbol is Sel. — RRUFF Project

IUPAC name
magnesium difluoride
Molecular formula
F2Mg
Molecular weight
62.302 g/mol
Exact mass
61.9818480 Da
Topological polar surface area
0.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
2
Covalent units
3
Defined stereocentres
0

Also known as

AfluonIrtran 1Magnesium fluoride (MgF2)Magnesium fluorure5N014C7IWUMagnesia FluorataRefChem:58725231-995-1
16 more reported names
Sellaitemagnesium;difluorideMagnesium fluorure [French]EINECS 231-995-1UNII-5N014C7IWUAluminum chlorohydrate solutionMagnesium fluoride, anhydrousMagnesium fluoride, Optical GradeMagnesium fluoride, technical gradeTYD-00847Magnesium fluoride, for glass industryHY-W019922Magnesium fluoride crystals, optical gradeMagnesium fluoride sol, 0.4 M in ethanolCS-0031731Magnesium fluoride, 99.99% (metals basis)
Open full PubChem recordPubChem annotations3D structure image

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 7783-40-6

1 total
Annex
III
Entry
56

MAGNESIUM FLUORIDE

Magnesium fluoride

Contains magnesium fluoride For any toothpaste with compounds containing fluorine in a concentration of 0.1 to 0.15% calculated as F unless it is already labelled as contra-indicated for children (e.g. "for adult use o…

EC
231-995-1
Max concentration

How CAS 7783-40-6 is used on this site

CAS 7783-40-6 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 1 EU annex record shares this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 7783-40-6 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.

Frequently asked questions

A substance identified by CAS 7783-40-6 may appear in multiple EU cosmetic regulation annexes when it is subject to different conditions in different contexts. For example, a substance might be restricted under Annex III with specific conditions, and the same CAS might also appear in Annex IV as an approved colorant under separate entry conditions. Each entry must be reviewed individually.

Cross-reference the CAS number against your raw material specification sheets and CoA documents. When a CAS appears in Annex II, verify absence. When it appears in Annex III, verify that concentration limits and product type conditions are met in your formulation. All annex entries sharing this CAS number are listed above.

A CAS number is assigned by the Chemical Abstracts Service (USA) and is globally recognised. An EC number is a European Commission identifier from inventories such as EINECS, ELINCS or the NLP list. Both identifiers may appear in EU cosmetic annex entries. Some substances have both, some have only one, and some older entries may have neither.

The INCI Checker accepts ingredient names, CAS numbers and EC numbers. Check this CAS number directly, then verify the result against supplier specification sheets and every linked annex condition.
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