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Chemical Datasheet
Chemical Identifiers
| CAS Number |
UN/NA Number |
DOT Hazard Label |
USCG CHRIS Code |
|
|
none
|
data unavailable
|
none
|
| NIOSH Pocket Guide |
International Chem Safety Card |
|
Silica, amorphous
|
none
|
NFPA 704
data unavailable
General Description
Transparent to gray, odorless powder. Irritating to the skin and eyes on contact. Inhalation will cause irritation in the respiratory tract. [Note: Amorphous silica is the non-crystalline form of SiO2.]
Hazards
Reactivity Alerts
none
Air & Water Reactions
No rapid reaction with air. No rapid reaction with water.
Fire Hazard
No information available.
Health Hazard
Excerpt from NIOSH Pocket Guide for Silica, amorphous:
Exposure Routes: Inhalation, skin and/or eye contact
Symptoms: Irritation eyes, pneumoconiosis
Target Organs: Eyes, respiratory system (NIOSH, 2023)
Reactivity Profile
SILICA, AMORPHOUS is a non-combustible solid. Generally unreactive chemically. Incompatible with fluorine, oxygen difluoride, chlorine trifluoride. Soluble in molten alkalis and reacts with most metallic oxides at high temperature.
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents
No information available.
Response Recommendations
Isolation and Evacuation
No information available.
Firefighting
No information available.
Non-Fire Response
No information available.
Protective Clothing
Excerpt from NIOSH Pocket Guide for Silica, amorphous:
Skin: No recommendation is made specifying the need for personal protective equipment for the body.
Eyes: No recommendation is made specifying the need for eye protection.
Wash skin: No recommendation is made specifying the need for washing the substance from the skin (either immediately or at the end of the work shift).
Remove: No recommendation is made specifying the need for removing clothing that becomes wet or contaminated.
Change: No recommendation is made specifying the need for the worker to change clothing after the workshift. (NIOSH, 2023)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
Excerpt from NIOSH Pocket Guide for Silica, amorphous:
Eye: IRRIGATE IMMEDIATELY - If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.
Breathing: FRESH AIR - If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. Other measures are usually unnecessary. (NIOSH, 2023)
Physical Properties
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point:
3110°F
(NIOSH, 2023)
Vapor Pressure:
0 mmHg
(approx)
(NIOSH, 2023)
Vapor Density (Relative to Air): data unavailable
Specific Gravity:
2.2
(NIOSH, 2023)
- Denser than water; will sink
Boiling Point:
4046°F
at 760 mmHg
(NIOSH, 2023)
Molecular Weight:
60.1
(NIOSH, 2023)
Water Solubility:
Insoluble
(NIOSH, 2023)
Ionization Energy/Potential: data unavailable
IDLH:
3000 mg/m3
(NIOSH, 2023)
AEGLs (Acute Exposure Guideline Levels)
No AEGL information available.
ERPGs (Emergency Response Planning Guidelines)
No ERPG information available.
PACs (Protective Action Criteria)
| Chemical |
PAC-1 |
PAC-2 |
PAC-3 |
| Silica amorphous hydrated (7631-86-9)
|
18 mg/m3 |
740 mg/m3 |
4500 mg/m3 |
(DOE, 2018)
Regulatory Information
EPA Consolidated List of Lists
No regulatory information available.
CISA Chemical Facility Anti-Terrorism Standards (CFATS)
No regulatory information available.
OSHA Process Safety Management (PSM) Standard List
No regulatory information available.
Alternate Chemical Names