Salts & Minerals
REACH
Quartz
CAS Number
14808-60-7
EC Number
238-878-4
What is Quartz?
Quartz (CAS 14808-60-7), also sold as Silicon Dioxide or E551, is a naturally occurring crystalline mineral processed for construction and electronics.
Where is Quartz used?
- Building and construction: compounded into mortars, grouts, and engineered stone slabs
- Electronics: raw material for silicon wafer production and filler in epoxy encapsulants for semiconductor packaging
- Foundry and refractory: quartz sand as mold medium and heat-resistant aggregate in furnace linings
- Plastics and polymer compounding: milled quartz improves scratch resistance and reduces shrinkage in thermoset and thermoplastic systems
- It functions as a functional filler, abrasive, and rheology modifier in solid and composite systems.
Commercial specifications
- Purity levels typically specified by SiO2 content
- Surface-treated variants for polymer compounding where improved matrix adhesion is required
Other Names (Synonyms)
SiO2|α-Quarz|SILICON DIOXIDE|Silica|Silicic anhydride|Diatomaceous silica|Wessalon|Zorbax sil|E600
What are the physical properties of Quartz?
Melting Point 1610 °C
Boiling Point 2230 °C
Density 2.6 g/cm³
Appearance Silicon dioxide/crystalline silica is a component of many mineral dusts and materials which melts to a glass at very high temperature.
Color white
Form powder
Water Solubility insoluble
Refractive Index n 20/D 1.544(lit.)
pH 5-8 (400g/l, H2O, 20℃)(slurry)
How is Quartz classified and handled safely? Learn More
Warning
GHS07· Irritant GHS08· Health Hazard
Hazard Statements
H315 Causes skin irritation
H319 Causes serious eye irritation
H320 Causes eye irritation
H335 May cause respiratory irritation
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
Which trade and regulatory codes apply to Quartz?
HS Code 25061000
Storage Class 6.1D - Non-combustible acute toxic Cat.3
toxic hazardous materials or hazardous materials causing chronic effects
WGK (Germany) 3