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Oxides and peroxides

Magnesium silicate

Also known as Ambosol, Silicic acid, magnesium salt, Magsorbent

CAS 1343-88-0Formula MgO3SiMolar mass 100.39 g/molEC 215-681-1
GHS signal word: Danger. Pictograms: Corrosive, Harmful or irritant 24 suppliers listed
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Magnesium silicate chemical structure, MgO3Si, CAS 1343-88-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1343-88-0
Formula
MgO3Si
Appearance
Fine, white powder
Density
2.5 @25 °C
HS code
251990
Category
Oxides and peroxides
Illustrative photo, fine white powder in a clear glass bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Magnesium silicate?

Plain description, key identifiers and synonyms

Magnesium silicate is a chemical substance with the molecular formula MgO3Si and a molar mass of 100.39 g/mol. Its CAS registry number is 1343-88-0. The IUPAC name is magnesium, tris(oxygen(2-)), silicon(4+).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
magnesium, tris(oxygen(2-)), silicon(4+)
CAS number
1343-88-0 CAS number cross-checkedOther or deprecated CAS: 13776-74-4
EC numbers
215-681-1, 237-413-2
Molecular formula
MgO3Si
UNII
9B9691B2N9
INCI name
MAGNESIUM SILICATE
InChIKey
ZADYMNAVLSWLEQ-UHFFFAOYSA-N
InChI
InChI=1S/Mg.3O.Si/q+2;3*-2;+4
SMILES (canonical and isomeric)
[O-2].[O-2].[O-2].[Mg+2].[Si+4]

Synonyms

  • Ambosol
  • Silicic acid, magnesium salt
  • Magsorbent
  • Avibest
  • Britesorb
  • Gastomag
  • Magmasil
  • Naisuton
  • Novasorb
  • Salisil
  • Trinesium
  • Trisomin
  • Chooz
  • Nikkagel M
  • Shimugon M
  • Magnesol XL
  • Tri-Sil
  • Britesorb 90
  • Haiburaito 325
  • Macrosorb M 15
  • Haiburaito 1250
  • Silton SS 1
  • Celkate T 21
  • Kyowaad 600S
  • Mizuka Life P 1G
Show all 38 synonyms
  • Mizupearl M 302
  • Britesorb No. 40
  • Magnesium hydrosilicate
  • Magnesium silicate (talc)
  • INS NO.553(I)
  • KW 600S
  • INS-553(I)
  • E-553(I)
  • Magnesium silicate,
  • Florisil
  • Magnesol
  • Sep-Pak Florisil
  • HS-T (silicate)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Fine, white powderexp.
Density
2.5 @25 °Cexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
100.39 g/molcalc.
Exact mass
99.9467 Dacalc.
LogP (octanol/water)
-1.12calc.
Topological polar surface area
85.5 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
5calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
5calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS05: Corrosive
Corrosive
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H318Causes serious eye damage.
  • H319Causes serious eye irritation.
Precautionary statements (6)
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Magnesium silicate suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 24 suppliers
24 of 24 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

24 suppliers in 10 countries

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Magnesium silicate price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Florisil ... Is used in vitamin analysis, chromatography, (and) antibiotic processing.

Rubber filler, ceramics, glass, refractories, absorbent for crude oil spills, manufacture of permanently dry resins and resinous compositions, paints, varnishes, and paper (filler), animal and vegetable oils (bleaching agent), odor absorbent, filter medium, catalyst and catalyst carrier, anticaking agent in foods.

Industrial uses: Flame retardant, Absorbent, Catalyst, Binder, Other, Processing aids not otherwise specified.

Consumer uses: Other, Catalyst, Absorbent.

Use classes: Cosmetics.

Cosmetic ingredient, INCI name MAGNESIUM SILICATE(absorbent, anticaking, bulking, opacifying)

Functional uses

  • Absorbent
  • Anti-adhesive/cohesive
  • Anti-caking agent
  • Conductive agent
  • Filler
  • Opacifer
  • Processing aids not otherwise specified
  • Thickening agent
  • Viscosity modifier

Cosmetic functions

  • Absorbent
  • Anticaking
  • Bulking
  • Opacifying
  • Viscosity controlling

How it is made

Simons, united states patent 2,393,625 (1946 to floridin). (Florisil, an activated magnesium silicate)

Interaction of a magnesium salt and a soluble silicate

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Magnesium silicate is traded under.

HS 2519.90Indicative HS code

Magnesia, fused or dead-burned (sintered) whether or not containing small quantities of other oxides added…

World exports in 2024
$1.67B
−4.1% vs 2023, imports $1.72B
2019 to 2024
Top exporters
  1. China45.9%
  2. Netherlands7.5%
  3. Brazil5.2%
Top importers
  1. United States13.4%
  2. Germany9.3%
  3. India * partner reported7.8%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Magnesium silicate is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Magnesium silicate, based on the data on this page

What is Magnesium silicate?

Magnesium silicate is a chemical substance with the molecular formula MgO3Si and a molar mass of 100.39 g/mol. Its CAS registry number is 1343-88-0. The IUPAC name is magnesium, tris(oxygen(2-)), silicon(4+).

What is the CAS number of Magnesium silicate?

The CAS registry number of Magnesium silicate is 1343-88-0. Other or deprecated CAS numbers: 13776-74-4.

What is the molecular formula and weight of Magnesium silicate?

The molecular formula of Magnesium silicate is MgO3Si and its molar mass is 100.39 g/mol.

What is Magnesium silicate used for?

Florisil ... Is used in vitamin analysis, chromatography, (and) antibiotic processing.

Is Magnesium silicate hazardous?

Magnesium silicate carries the GHS signal word "Danger". Main hazards: causes serious eye damage, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Magnesium silicate?

Magnesium silicate is usually classified under HS code 251990 (Natural magnesium carbonate (magnesite), fused magnesia, dead-burned (sintered)…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Magnesium silicate?

CompoundList lists 24 suppliers of Magnesium silicate in India, China, United States, France and 6 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Magnesium silicate in India?

6 suppliers in India list Magnesium silicate on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Magnesium silicate?

Suppliers quote Magnesium silicate on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Magnesium silicate

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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