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Magnesium hexafluorosilicate

CAS Number
18972-56-0
EC Number
606-187-0
Chemical Formula
F6Si.6H2O.Mg
Molecular Weight
166.38 g/mol
Industries:Water TreatmentTextile, Leather & PaperBuilding & Construction

Description

Magnesium hexafluorosilicate (CAS 18972-56-0 ), also known as magnesium fluorosilicate, is an inorganic fluorosilicate salt used industrially as a surface hardening agent and biocidal preservative. It is applied to porous substrates to improve durability, resist biological degradation, and modify surface chemistry across construction, textile, and water treatment processes. In concrete and masonry treatment, it reacts with calcium hydroxide in cured cement to densify and harden surface layers, extending the service life of floors, pavements, and structural elements. Textile and leather processors use it as a fixing and preservation agent, improving resistance to microbial attack in treated fabrics and hides during various stages of production. In paper manufacturing, it functions as a surface modifier that improves wet strength and resistance to biological deterioration during storage or processing for industrial use. Water treatment operations employ it as a fluoridating and conditioning agent in specific municipal and industrial treatment programs to ensure proper chemical balance and safety. The product is supplied as a white crystalline powder or in aqueous solution, with solution concentrations typically ranging from 20% to 30% depending on the specific requirements. The product is available in Technical grade for standard commercial specification. Purity levels and packaging formats vary by application, with bulk supply available for large-scale procurement. Contact us for supply of Magnesium hexafluorosilicate Request Quote

Other Names (Synonyms)

Magnesium fluorosilicate | Caswell No. 532 | Hexafluorosilicate(2-) magnesium (1:1) | Fluosilicate de magnesium [French] | Fluosilicate de magnesium | Silicate(2-), hexafluoro-, magnesium (1:1) | EPA Pesticide Chemical Code 075304

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point120°C (dec.)
Density1,79 g/cm 3
AppearanceWhite powder
Colorwhite
FormPowder
pH3.1

Safety & Handling

Danger
GHS06· ToxicGHS05· CorrosiveGHS07· IrritantGHS08· Health Hazard

Hazard Statements

H301Toxic if swallowed
H318Causes serious eye damage
H319Causes serious eye irritation
H320Causes eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation
H372Causes damage to organs through prolonged or repeated exposure
H373May causes damage to organs through prolonged or repeated exposure

Precautionary Statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P317Get emergency medical help.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P316Get emergency medical help immediately.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P233Store in a well-ventilated place. Keep container tightly closed.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code28269080