Ingredient Dictionary

TRIMAGNESIUM PHOSPHATE

Magnesium phosphate is an inorganic magnesium salt.

Definition

Magnesium phosphate is an inorganic magnesium salt.

Source: PubChem

US FDA substance register · UNII XMK14ETW2D · registered name MAGNESIUM PHOSPHATE ANHYDROUS · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Makes a clear formula opaqueOPACIFYINGStops powders from cakingANTICAKINGAdds bulkBULKING

Safety & regulatory references

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

Reviewed by CIR: Safety Assessment of Phosphoric Acid and Its Salts as Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)

More data — names, identifiers, properties, test records, literature

Official labels & definitions

JCIA labelling name リン酸３Ｍｇ: 本品は、リン酸（＊）の三マグネシウム塩であり、次の化学式で表される。

Source: JCIA labelling names (Japan)

JCIA labelling name スルホコハク酸ラウレス－３Ｍｇ: 本品は、スルホコハク酸とラウレス－３（＊）とのモノエステルのマグネシウム塩で、次の化学式で表される。

Source: JCIA labelling names (Japan)

Names & identifiers

TRIMAGNESIUM PHOSPHATEINCI트라이마그네슘포스페이트Korean label name (MFDS standard)Phosphoric acid, magnesium salt (2:3)Synonymスルホコハク酸ラウレス－３ＭｇJapanese labelling nameリン酸３ＭｇJapanese labelling name

CAS No.chemical registry number: 7757-87-1
EC No.EU chemical inventory number: 231-824-0
DTXSIDUS EPA chemical ID: DTXSID00872527
DTXCIDUS EPA compound ID: DTXCID90820173

IUPAC: Magnesium phosphate (3/2)
Molecular formula: Mg3O8P2
Molecular weight: 262.855 g/mol

Measured properties

Appearance: Odorless iridescent solid, [HSDB] White odorless powder, [MSDSonline] · RHOMBIC PLATES
Odour: odorless · odourless
Melting point: 1,184 °C
Solubility: INSOL IN COLD OR HOT WATER, INSOL IN LIQUID AMMONIA, SOL IN AMMONIUM SALT SOLN
Density: Crystallizes with 5, 8, and 22 H2O /molecules/ ... salts are practically insoluble in water but readily soluble in acids, density (octahydrate): 2.19, density (22 H2O): 1.66
Colour: white
pH: 0.66
Melting/freezing point: 1184 ℃
Relative density: 2.195
Molecular weight: 262.86

Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.

Source: PubChem · KOSHA safety data sheets (Korea)

What products actually use it for

What the 8 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.

Filler1
Thickening agent1
pH regulating agent1
Opacifer1
Anti-caking agent1
Soil amendments1
Pigment1
Flavouring and nutrient1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

2 skin studies and 2 eye studies are on record.

Classed as low2

The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 4 studies

Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion) equivalent or similar to
Not likely to be sensitizing
skin sensitisation: in vivo (LLNA) · Screening · according to OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay) according to EU Method B.42 (Skin Sensitisation: Local Lymph Node Assay)
Ambiguous
eye irritation: in vitro / ex vivo · Screening · OECD Guideline 437 (Bovine Corneal Opacity and Permeability Test Method for Identifying Ocular Corrosives and Severe Irritants) [before 26 July 2013] according to
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion) according to OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to