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Oxides and peroxides

Feldspar

Also known as Aluminate(1-), octaoxotrisilicate-, potassium, Orthoclase, Orthoclase (K(AlSi3O8))

CAS 12168-80-8Formula AlKO8Si3Molar mass 278.33 g/molEC 934-437-1
GHS signal word: Warning. Pictograms: Serious health hazard 10 suppliers listed
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Feldspar chemical structure, AlKO8Si3, CAS 12168-80-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
12168-80-8
Formula
AlKO8Si3
Molar mass
278.33 g/mol
EC number
934-437-1
HS code
252910
Category
Oxides and peroxides

What is Feldspar?

Plain description, key identifiers and synonyms

Feldspar is a chemical substance with the molecular formula AlKO8Si3 and a molar mass of 278.33 g/mol. Its CAS registry number is 12168-80-8. The IUPAC name is aluminum, potassium, octakis(oxygen(2-)), tris(silicon(4+)).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
aluminum, potassium, octakis(oxygen(2-)), tris(silicon(4+))
CAS number
12168-80-8Other or deprecated CAS: 12251-44-4
EC number
934-437-1
Molecular formula
AlKO8Si3
UNII
96874XSJ39
INCI name
FELDSPAR POWDER, MOONSTONE EXTRACT, ORTHOCLASE
InChIKey
DLHONNLASJQAHX-UHFFFAOYSA-N
InChI
InChI=1S/Al.K.8O.3Si/q+3;+1;8*-2;3*+4
SMILES (canonical and isomeric)
[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+]

Synonyms

  • Aluminate(1-), octaoxotrisilicate-, potassium
  • Orthoclase
  • Orthoclase (K(AlSi3O8))
  • aluminum, potassium, oxygen(2-), silicon(4+)
  • Potassium feldspar
  • Orthose
  • Aluminum potassium silicon oxide (AlKSi3O8)
  • Gems'tone lepidolite

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
278.33 g/molcalc.
Exact mass
277.8353 Dacalc.
LogP (octanol/water)
-5.47calc.
Topological polar surface area
228 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
13calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
13calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H373May cause damage to organs through prolonged or repeated exposure.
Precautionary statements (3)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P319Get medical help if you feel unwell.
  • 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

Feldspar suppliers

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

All 10 suppliers
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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

10 suppliers in 6 countries

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Feldspar 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

Cosmetic ingredient, INCI name ORTHOCLASE(abrasive)

Functional uses

  • Abrasive
  • Filler
  • Flux agent
  • Viscosity modifier

Cosmetic functions

  • Abrasive
  • Skin conditioning

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2529.10Exact HS code

Feldspar

World exports in 2024
$603M
+9.7% vs 2023, imports $543M
2019 to 2024
Top exporters
  1. Turkey43.2%
  2. South Africa15.2%
  3. India * partner reported6.0%
Top importers
  1. Italy23.8%
  2. India * partner reported17.7%
  3. Spain16.1%

* Partner reported figures, a lower bound.

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

The HS code shown for Feldspar 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 Feldspar, based on the data on this page

What is Feldspar?

Feldspar is a chemical substance with the molecular formula AlKO8Si3 and a molar mass of 278.33 g/mol. Its CAS registry number is 12168-80-8. The IUPAC name is aluminum, potassium, octakis(oxygen(2-)), tris(silicon(4+)).

What is the CAS number of Feldspar?

The CAS registry number of Feldspar is 12168-80-8. Other or deprecated CAS numbers: 12251-44-4.

What is the molecular formula and weight of Feldspar?

The molecular formula of Feldspar is AlKO8Si3 and its molar mass is 278.33 g/mol.

What is Feldspar used for?

Known uses and roles of Feldspar include skin conditioning agents in cosmetics and personal care, abrasive, skin conditioning, filler, flux agent and 1 more.

Is Feldspar hazardous?

Feldspar carries the GHS signal word "Warning". Main hazards: may cause damage to organs through prolonged or repeated exposure. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Feldspar?

Feldspar is usually classified under HS code 252910 (Feldspar). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Feldspar?

CompoundList lists 10 suppliers of Feldspar in India, China, Indonesia, Ireland and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Feldspar in India?

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

What is the price of Feldspar?

Suppliers quote Feldspar 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 Feldspar

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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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