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Silicates, borates and other salts

Mullite

Also known as Mullite-alpha, MP 40-02, Mullitealpha

CAS 1302-93-8Formula Al6O13Si2Molar mass 426.05 g/molEC 215-113-2
GHS signal word: Danger. Pictograms: Serious health hazard 20 suppliers listed
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Mullite chemical structure, Al6O13Si2, CAS 1302-93-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1302-93-8
Formula
Al6O13Si2
Molar mass
426.05 g/mol
Physical form
Crystals
HS code
250860
Category
Silicates, borates and other salts
Illustrative photo, a shrink wrapped pallet of kraft paper sacks in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Mullite?

Plain description, key identifiers and synonyms

Mullite is a chemical substance with the molecular formula Al6O13Si2 and a molar mass of 426.05 g/mol. Its CAS registry number is 1302-93-8. The IUPAC name is bis(dioxosilane), oxo(oxoalumanyloxy)alumane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
bis(dioxosilane), oxo(oxoalumanyloxy)alumane
CAS number
1302-93-8 CAS number cross-checkedOther or deprecated CAS: 142844-00-6, 37287-16-4
EC numbers
215-113-2, 604-314-4, 913-504-9
Molecular formula
Al6O13Si2
InChIKey
KZHJGOXRZJKJNY-UHFFFAOYSA-N
InChI
InChI=1S/6Al.2O2Si.9O/c;;;;;;2*1-3-2;;;;;;;;;
SMILES (canonical and isomeric)
O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Si]=O.O=[Si]=O

Synonyms

  • Mullite-alpha
  • MP 40-02
  • Mullitealpha
  • Porcelainite
  • Dynamullit
  • 3M Interam 1550HT
  • MP 4002
  • Mullite (Al6O5(SiO4)2)
  • Refractories, fibers, aluminosilicate
  • dioxosilane, oxo(oxoalumanyloxy)alumane
  • Aluminum silicate washed fibres free of&
  • Cerabeads 1700
  • Aluminosilicate (Mullite)
  • AM 72S
  • MP 40
  • CK 1081
  • Refractory ceramic fibers
  • Mullit
  • Mullite, -325 Mesh
  • Aluminum silicate, powder
  • Aluminum oxide-silicon oxide (13%), catalyst support, low surface area, macroporous

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

Physical form
Crystalsexp.

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
426.05 g/molcalc.
Exact mass
425.777 Dacalc.
LogP (octanol/water)
-4.44calc.
Topological polar surface area
198.4 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
13calc.
Rotatable bonds
6calc.
Heavy atoms
21calc.
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
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H350May cause cancer.
  • H350iMay cause cancer by inhalation.
Precautionary statements (5)
  • P203Obtain, read and follow all safety instructions before use.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P318If exposed or concerned, get medical advice.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

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

Mullite suppliers

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

All 20 suppliers
20 of 20 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

20 suppliers in 7 countries

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Mullite price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Industrial uses: Absorbent, Other, Stabilizing agent, Hardener.

Consumer uses: Other.

Functional uses

  • Filler

Regulatory status

Inventories, regulations and trade controls that list this substance

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 Mullite is traded under.

HS 2508.60Exact HS code

Clays (excluding expanded clays of heading 6806): mullite

World exports in 2024
$65.7M
−18.3% vs 2023, imports $132M
2019 to 2024
Top exporters
  1. China39.5%
  2. Germany18.1%
  3. United States13.9%
Top importers
  1. Poland24.4%
  2. Germany12.3%
  3. South Korea10.9%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Mullite is indicative (it was matched by name in the HS nomenclature). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Mullite, based on the data on this page

What is Mullite?

Mullite is a chemical substance with the molecular formula Al6O13Si2 and a molar mass of 426.05 g/mol. Its CAS registry number is 1302-93-8. The IUPAC name is bis(dioxosilane), oxo(oxoalumanyloxy)alumane.

What is the CAS number of Mullite?

The CAS registry number of Mullite is 1302-93-8. Other or deprecated CAS numbers: 142844-00-6, 37287-16-4.

What is the molecular formula and weight of Mullite?

The molecular formula of Mullite is Al6O13Si2 and its molar mass is 426.05 g/mol.

What is Mullite used for?

Industrial uses: Absorbent, Other, Stabilizing agent, Hardener. Consumer uses: Other.

Is Mullite hazardous?

Mullite carries the GHS signal word "Danger". Main hazards: may cause cancer, may cause cancer by inhalation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Mullite?

Mullite is usually classified under HS code 250860 (Mullite). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Mullite?

CompoundList lists 20 suppliers of Mullite in United States, China, India, Canada and 3 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Mullite in India?

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

What is the price of Mullite?

Suppliers quote Mullite 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 Mullite

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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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