HuagongsheHuagongshe Chemistry Print Report · For research reference only

HCID 24439Generated: October 27, 2026

Magnesium Phosphate

Einecs 233-142-9 · MONOMAGNESIUMPHOSPHATE · phosphoric acid, magnesium salt · Phosphoric acid/magnesium,(1:x) salt · Phosphoric acid, magnesium salt (1:?)

https://huagongshe.com/en/chemical/24439

Identifiers & Physical Properties

CAS No.	10043-83-1
Molecular formula	Mg3O8P2
Average molar mass	262.86 g/mol
Monoisotopic mass	261.86196532 g/mol
SMILES	O=P([O-])([O-])[O-].O=P([O-])([O-])[O-].[Mg+2].[Mg+2].[Mg+2]
InChIKey	GVALZJMUIHGIMD-UHFFFAOYSA-H
PubChem CID	24439
ChEMBL	CHEMBL2106873
ChEBI	CHEBI:190298
EC No.	231-824-0
DTXSID	DTXSID00872527

Chemical & Physical Properties

Topological polar surface area	173
Hydrogen bond donors	0
Hydrogen bond acceptors	8
Rotatable bonds	0
Heavy atoms	13
Formal charge	0
Complexity	36.8
Chemical classes	Metals -> Phosphates, Metallic Salts
Polymers	Plastics -> N.a.Plastics -> Pigments agents
Cosmetics	Cosmetic ingredients (Magnesium Phosphate) -> CIR (Cosmetic Ingredient Review)Cosmetic ingredients (Trimagnesium Phosphate) -> CIR (Cosmetic Ingredient Review)OpacifyingAnticakingBulking
Odor	odorless
Taste	tasteless
Food additives	NUTRIENT SUPPLEMENT, PH CONTROL AGENT, STABILIZER OR THICKENER -> FDA Substance added to food
Density	Crystallizes with 5, 8, and 22 H2O /molecules/ ... salts are practically insoluble in water but readily soluble in acidsdensity (octahydrate): 2.19density (22 H2O): 1.66
Color/Form	RHOMBIC PLATES
Solubility	INSOL IN COLD OR HOT WATERINSOL IN LIQUID AMMONIASOL IN AMMONIUM SALT SOLN
Melting point	1,184 °C
Food Contact Substances	FCS -> FDA Inventory of Food Contact Substances Listed in 21 CFR
Physical Description	Odorless iridescent solid[HSDB] White odorless powder[MSDSonline]
Cosmetics Ingredients Functions	LIGHT STABILIZER
LogP (partition coefficient)	-2.148 (est)
Indirect Additives used in Food Contact Substances	MAGNESIUM PHOSPHATE
FDA 21 CFR	175.300181.29
EPA Substance Registry System	Phosphoric acid, magnesium salt (10043-83-1)
GHS pictogram	GHS05,GHS06
Signal word	Danger
GHS hazard statements	H314-H331-H311-H302
GHS precautionary statements	P261-P271-P304+P340-P311-P321-P403+P233-P405-P501-P264-P270-P301+P312-P330-P501-P280-P302+P352-P312-P322-P361-P363-P405-P501-P260-P264-P280-P301+P330+P331-P303+P361+P353-P363-P304+P340-P310-P321-P305+P351+P338-P405-P501
TSCA inventory status	TSCA listed

Safety & Regulations

GHS classification	This chemical does not meet GHS hazard criteria for 100% (125 of 125) of all reports.Not ClassifiedAggregated GHS information provided per 125 reports by companies from 2 notifications to the ECHA C&L Inventory.WarningH315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)
Regulatory information	Chemical: Phosphoric acid, magnesium salt (2:3)Chemical: Phosphoric acid, magnesium saltStatus: Active Update: 20-01-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/11587Phosphoric acid, magnesium salt (1:?): Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.Phosphoric acid, magnesium salt (2:3): Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.
Other safety information	IMAP assessments - Phosphoric acid, magnesium salt (2:3): Human health tier I assessmentIMAP assessments - Phosphoric acid, magnesium salt: Human health tier I assessment
Hazards summary	See Magnesium.
FDA requirements	Substance added directly to human food affirmed as generally recognized as safe (GRAS).
Hazard Classes and Categories	Acute Tox. 4 (78.6%)Skin Irrit. 2 (100%)Not Classified
Disposal methods	SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.
Toxicity summary	The CIR Expert Panel concluded that the following 31 ingredients are safe in the present practices of use and concentration in cosmetics as described in this safety assessment, when formulated to be non-irritating...Magnesium Phosphate...

CAS No.

10043-83-1

Molecular formula

Mg3O8P2

Average molar mass

262.86 g/mol

Monoisotopic mass

261.86196532 g/mol

SMILES

O=P([O-])([O-])[O-].O=P([O-])([O-])[O-].[Mg+2].[Mg+2].[Mg+2]

InChIKey

GVALZJMUIHGIMD-UHFFFAOYSA-H

PubChem CID

24439

ChEMBL

CHEMBL2106873

ChEBI

CHEBI:190298

EC No.

231-824-0

DTXSID

DTXSID00872527

Chemical & Physical Properties

Topological polar surface area

173

Hydrogen bond donors

Hydrogen bond acceptors

Rotatable bonds

Heavy atoms

Formal charge

Complexity

36.8

Chemical classes

Metals -> Phosphates, Metallic Salts

Polymers

Plastics -> N.a.Plastics -> Pigments agents

Cosmetics

Cosmetic ingredients (Magnesium Phosphate) -> CIR (Cosmetic Ingredient Review)Cosmetic ingredients (Trimagnesium Phosphate) -> CIR (Cosmetic Ingredient Review)OpacifyingAnticakingBulking

Odor

odorless

Taste

tasteless

Food additives

NUTRIENT SUPPLEMENT, PH CONTROL AGENT, STABILIZER OR THICKENER -> FDA Substance added to food

Density

Crystallizes with 5, 8, and 22 H2O /molecules/ ... salts are practically insoluble in water but readily soluble in acidsdensity (octahydrate): 2.19density (22 H2O): 1.66

Color/Form

RHOMBIC PLATES

Solubility

INSOL IN COLD OR HOT WATERINSOL IN LIQUID AMMONIASOL IN AMMONIUM SALT SOLN

Melting point

1,184 °C

Food Contact Substances

FCS -> FDA Inventory of Food Contact Substances Listed in 21 CFR

Physical Description

Odorless iridescent solid[HSDB] White odorless powder[MSDSonline]

Cosmetics Ingredients Functions

LIGHT STABILIZER

LogP (partition coefficient)

-2.148 (est)

Indirect Additives used in Food Contact Substances

MAGNESIUM PHOSPHATE

FDA 21 CFR

175.300181.29

EPA Substance Registry System

Phosphoric acid, magnesium salt (10043-83-1)

GHS pictogram

GHS05,GHS06

Signal word

Danger

GHS hazard statements

H314-H331-H311-H302

GHS precautionary statements

P261-P271-P304+P340-P311-P321-P403+P233-P405-P501-P264-P270-P301+P312-P330-P501-P280-P302+P352-P312-P322-P361-P363-P405-P501-P260-P264-P280-P301+P330+P331-P303+P361+P353-P363-P304+P340-P310-P321-P305+P351+P338-P405-P501

TSCA inventory status

TSCA listed

Safety & Regulations

GHS classification

This chemical does not meet GHS hazard criteria for 100% (125 of 125) of all reports.Not ClassifiedAggregated GHS information provided per 125 reports by companies from 2 notifications to the ECHA C&L Inventory.WarningH315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)

Regulatory information

Chemical: Phosphoric acid, magnesium salt (2:3)Chemical: Phosphoric acid, magnesium saltStatus: Active Update: 20-01-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/11587Phosphoric acid, magnesium salt (1:?): Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.Phosphoric acid, magnesium salt (2:3): Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.

Other safety information

IMAP assessments - Phosphoric acid, magnesium salt (2:3): Human health tier I assessmentIMAP assessments - Phosphoric acid, magnesium salt: Human health tier I assessment

Hazards summary

See Magnesium.

FDA requirements

Substance added directly to human food affirmed as generally recognized as safe (GRAS).

Hazard Classes and Categories

Acute Tox. 4 (78.6%)Skin Irrit. 2 (100%)Not Classified

Disposal methods

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Toxicity summary

The CIR Expert Panel concluded that the following 31 ingredients are safe in the present practices of use and concentration in cosmetics as described in this safety assessment, when formulated to be non-irritating...Magnesium Phosphate...