What does the restriction note for MAGNESIUM SULFIDE mean?

The restriction field for MAGNESIUM SULFIDE reads: III/23. This is the restriction note from the CosIng inventory. For authoritative conditions and limits, always refer to the linked annex entries.

What other records share CAS 12032-36-9?

CAS 12032-36-9 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

How do I check if my formula contains MAGNESIUM SULFIDE?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 3512215/10/2010

MAGNESIUM SULFIDE

Magnesium sulphide

MAGNESIUM SULFIDE is linked to 1 EU annex record on this page. Inventory note: III/23.

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Regulatory evidence by market

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Market	Evidence status	Records	Source language
European Union	Evidence linked Restricted entry found Open this evidence	1	English and EU languages
Great Britain	Source mapped Official source mapped; ingredient rule not imported	0	English
Canada	Source mapped Official source mapped; ingredient rule not imported	0	English and French
New Zealand	Source mapped Official source mapped; ingredient rule not imported	0	English
ASEAN	Source mapped Official source mapped; ingredient rule not imported	0	English and national languages
China	Source mapped Official source mapped; ingredient rule not imported	0	Chinese with selected English material
Japan	Source mapped Official source mapped; ingredient rule not imported	0	Japanese; official English translation available
South Korea	Source mapped Official source mapped; ingredient rule not imported	0	Korean with some English names
United States	Source mapped Official source mapped; ingredient rule not imported	0	English
Australia	Source mapped Official source mapped; ingredient rule not imported	0	English
Brazil	Source mapped Official source mapped; ingredient rule not imported	0	Portuguese with INCI crosswalks
India	Source mapped Official source mapped; ingredient rule not imported	0	English and Hindi
Saudi Arabia	Source mapped Official source mapped; ingredient rule not imported	0	Arabic and English

Chemical identity and properties

PubChem 2D chemical structure for CAS 12032-36-9

CAS 12032-36-9PubChem CID 82824

Magnesium sulfide

IUPAC name: sulfanylidenemagnesium

Molecular formula: MgS
Molecular weight: 56.37 g/mol
Exact mass: 55.9571129 Da
Topological polar surface area: 32.1 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 1
Covalent units: 1
Defined stereocentres: 0

Also known as

Magnesium sulfide (MgS)Magnesium sulphideUNII-TWD834A2KDTWD834A2KDEINECS 234-771-1RefChem:155269MAGNESIUM SULFIDE [INCI]MAGNESIUM MONOSULFIDE

1 more reported name

(Sulfido)magnesium

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID2065179

Evidence from additional scientific databases

NIH PubChem PUG-View

Exact identifier match82824

Attributed physical-property, hazard, environmental and use annotations.

Physical Description: White powder with an odor like rotten eggs; [Alfa Aesar MSDS] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases

Signal: Danger Source: European Chemicals Agency (ECHA)
GHS Hazard Statements: H252 (90.5%): Self-heating in large quantities; may catch fire [Warning Self-heating substances and mixtures]; H302 (90.5%): Harmful if swallowed [Warning Acute toxicity, oral]; H311 (90.5%): Toxic in contact with skin [Danger Acute toxicity, dermal]; H314 (90.5%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]; H400 (90.5%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard] Source: European Chemicals Agency (ECHA)
Precautionary Statement Codes: P235, P260, P262, P264, P270, P273, P280, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P330, P361+P364, P363, P391, P405, P407, P410, P413, P420, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
ECHA C&L Notifications Summary: Aggregated GHS information provided per 42 reports by companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)

Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record

Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.

Additional source coverage and match status

Source	Result	Checked
NIH PubChem PUG-View	Exact match	2026-08-31

A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.

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

Inventory details for MAGNESIUM SULFIDE

INCI name

MAGNESIUM SULFIDE

Description

Magnesium sulphide

Record provenance

Inventory reference: 35122
Imported identity: MAGNESIUM SULFIDE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for MAGNESIUM SULFIDE

Annex III Restriction reference

Entry 23

(a) Alkali sulphides (b) Alkaline earth sulphides

Key data

CAS

12032-36-9

234-771-1

Restriction

III/23

Function

DEPILATORY: Breaking down the mechanical strength of hair fibers so that they can be removed by mild scraping/rubbing.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#15819 · MAGNESIUM SULFIDE

Ingredients with overlapping formulation functions

HYDROGENATED DICYCLOPENTADIENE/ISOPENTENE/ISOPRENE/STYRENE COPOLYMERBINDING, DEPILATORY, PLASTICISER

HYDROGENATED POLYCYCLOPENTADIENEDEPILATORY

HYDROGENATED POLYDICYCLOPENTADIENEBINDING, DEPILATORY

LITHIUM SULFIDEDEPILATORY

MAGNESIUM THIOGLYCOLATEDEPILATORY, HAIR WAVING OR STRAIGHTENING, REDUCING

MEL POWDERABRASIVE, BINDING, BULKING, DEPILATORY, FLAVOURING

MERCAPTOPROPIONIC ACIDDEPILATORY, HAIR WAVING OR STRAIGHTENING, REDUCING

MESYLOXYBENZYL METHOXYETHYL CHLOROBENZAMIDEDEPILATORY, SKIN CONDITIONING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How MAGNESIUM SULFIDE appears in the CosIng inventory

The CosIng inventory lists MAGNESIUM SULFIDE as a cosmetic ingredient and this page links it to 1 annex record. The inventory entry captures names and identifiers, while the annex record shows where the substance is prohibited, restricted or positively listed in EU cosmetics law.

MAGNESIUM SULFIDE is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

MAGNESIUM SULFIDE appears in the EU CosIng inventory and has linked annex records. Check the annex records above for applicable restrictions, concentration limits and conditions of use. Annex II listing means prohibited; Annex III means restricted; Annexes IV, V and VI mean permitted under specified conditions.

The restriction field for MAGNESIUM SULFIDE reads: "III/23". This is the restriction note recorded in the CosIng inventory for this ingredient. For authoritative conditions and limits, always refer to the linked annex entries above.

According to the EU CosIng inventory, MAGNESIUM SULFIDE carries the following function designation(s):

DEPILATORY

CAS 12032-36-9 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for MAGNESIUM SULFIDE

This page combines the CosIng inventory entry for MAGNESIUM SULFIDE with 1 linked Annex II–VI record from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research MAGNESIUM SULFIDE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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Tools & next steps

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