Quartz

  • Silicic anhydride
  • Samd
  • Silicon dioxide
Formula
SiO2
Structure
Description
Colorless, white or variable, black, purple, green crystals.
Uses
Used in mining, quarrying, tunnelling, foundries. Used in the fabrication of stone and clay products; the manufacture of glass, enamels, ceramic products and glazes; as an abrasive and grinding media

Registry Numbers and Inventories.
CAS
14808-60-7
EC (EINECS/ELINCS)
238-878-4
RTECS
VV7330000
RTECS class
Tumorigen; Mutagen; Human Data
Beilstein/Gmelin
13882 (G)
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
O2Si
Formula mass
60.08
Melting point, °C
1427
Boiling point, °C
2230
Vapor pressure, mmHg
10 at 1732 C
Density
2.622 - 2.645 g/cm3
Solubility in water
Insoluble
Dielectric constant
4.1
Heat of fusion
8.5 kJ/mol

Hazards and Protection.
Storage
Store in a dry area.
D2A
Handling
Use only in a well ventilated area. Minimize dust generation and accumulation. Avoid ingestion and inhalation.
Protection
Eyes: Wear dust goggles. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
A NIOSH/MSHA approved air purifying dust or mist respirator or European Standard EN 149. Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions.
Stability
Stable under normal shipping and handling conditions.
Incompatibilities
Dissolves readily in hydrofluoric acid, forming silicon tetrafluoride, a corrosive gas. Reacts violently with powerful oxidizers such as chlorine trifluoride, manganese trifluoride, oxygen difluoride, vinyl acetate, and certain other fluorine-containing compounds. Will be attacked by strong alkalis.
Decomposition
Irritating and toxic gases.

Fire.
Fire fighting
Not flammable. Use extinguishing media and protective equipment most appropriate for surrounding fire.
Health
0
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: Ca TWA 0.05 mg/m3 See Appendix A NIOSH IDLH: Potential occupational carcinogen 25 mg/m3 (cristobalite, tridymite); 50 mg/m3 (quartz, tripoli)
Carcinogin
G-A2, I-1, N-1, CP65
Poison_Class
F (Not subject to toxicity classification)
Exposure effects
Prolonged exposure to respirable crystalline quartz may cause delayed lung injury/fibrosis (silicosis).
   Ingestion
May cause irritation of the digestive tract.
   Inhalation
Dust is irritating to the respiratory tract.
   Skin
Dust may cause mechanical irritation.
   Eyes
Dust may cause mechanical irritation.

First aid
 
   Ingestion
Treat symptomatically and supportively. Get medical aid.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
HS Code
2506 10 00