Safety data sheet for Amorphous silica
CAS 7631-86-9
This is the free preview of a draft SDS for Amorphous silica — Sections 1, 2 and 9, generated from the sources named below. The full 16-section draft, with your own company in Section 1, is $5 per document.
Typically documented by: Anti-caking agent, desiccant, coatings.
Draft safety data sheet — preview
Sections 1, 2, 9 of 16
- CAS number
- 7631-86-9
- Molecular formula
- SiO2
- Molecular weight
- 60.084 g/mol
- Signal word
- Warning
Hazard classification
- GHS07 — Health hazard — irritant
- H315: Causes skin irritation.
- H319: Causes serious eye irritation.
- H335: May cause respiratory irritation.
Section 1 — Identification
1.1 Product identifier
Product identifier: Silica
Chemical name (IUPAC): dioxosilane
CAS number: 7631-86-9
PubChem CID reference: 24261
Synonyms: SILICON DIOXIDE; Silica; Dioxosilane; Silicic anhydride; Diatomaceous silica; Wessalon; Zorbax sil; Silica, amorphous; Silica, colloidal; Sillikolloid
Section 2 — Hazards Identification
2.1 Classification of the substance or mixture
Classification basis: OSHA 29 CFR 1910.1200 Appendix A, aligned to the GHS Rev. 7 hazard classes this sheet resolves: Skin Irrit. 2, Eye Irrit. 2, STOT SE 3.
Classification: Skin Irritation, Category 2 (Skin Irrit. 2) [H315]
Classification: Eye Irritation, Category 2 (Eye Irrit. 2) [H319]
Classification: Specific Target Organ Toxicity, Single Exposure, Category 3 (STOT SE 3) [H335]
2.2 Label elements
Signal word: Warning
GHS pictograms: GHS07 (Exclamation)
Hazard statement: H315: Causes skin irritation.
Hazard statement: H319: Causes serious eye irritation.
Hazard statement: H335: May cause respiratory irritation.
Precautionary statement: P264+P265: Wash hands thoroughly after handling. Do not touch eyes.
Precautionary statement: P280: Wear protective gloves, protective clothing, eye protection, face protection, and hearing protection.
Precautionary statement: P271: Use only outdoors or in a well-ventilated area.
Precautionary statement: P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do - continue rinsing.
Precautionary statement: P304+P340: IF INHALED: Remove person to fresh air and keep comfortable for breathing.
Precautionary statement: P302+P352: IF ON SKIN: Wash with plenty of water.
Section 9 — Physical and Chemical Properties
9.1 Information on basic physical and chemical properties
Physical form: Solid
Appearance: Amorphous powder
Odor: Odorless
Boiling point: 2230°C (4046°F) at 1013 hPa
Melting point: 1710°C (3110°F)
Density: 2.2 @ 25 °C
Vapor pressure: 0 hPa
Water solubility: none
Not found in the public records searched: flash point, Log Pow (log Kow), vapor density, lower explosive limit, upper explosive limit, auto-ignition temperature, viscosity and pH. Enter these from your supplier's safety data sheet or your own test report before the draft is issued.
Occupational exposure limits for Amorphous silica
The airborne limits on public record in the United States. These are transcribed from the tables named in each row, not derived. The full draft puts them in Section 8 with the control and PPE guidance.
NIOSH REL — TWA (up to 10 h)
6 mg/m³
NIOSH Pocket Guide to Chemical Hazards
Where each value came from
- Odor — Hazardous Substances Data Bank (HSDB)
- NIOSH. NIOSH Pocket Guide to Chemical Hazards & Other Databases. U.S. Department of Health & Human Services, Public Health Service, Center for Disease Control & Prevention. DHHS (NIOSH) Publication No. 2001-145 (CD-ROM) August 2001
- View the record
- Boiling point — Hazardous Substances Data Bank (HSDB)
- Lewis, R.J. Sax's Dangerous Properties of Industrial Materials. 10th ed. Volumes 1-3 New York, NY: John Wiley & Sons Inc., 1999, p. V3 3205
- View the record
- Melting point — Hazardous Substances Data Bank (HSDB)
- Same reference as boiling point above.
- View the record
- Density — Hazardous Substances Data Bank (HSDB)
- O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. 13th Edition, Whitehouse Station, NJ: Merck and Co., Inc., 2001, p. 1523
- View the record
A value with no row here was assembled from more than one record, so no single record is credited for it. The draft you buy carries this table as an appendix covering all 16 sections.
Sources
- Hazardous Substances Data Bank (HSDB)
- NIOSH Pocket Guide to Chemical Hazards
- PubChem — GHS classification
- PubChem — compound record
- PubChem — names and identifiers
- PubChem — regulatory information
- PubChem — toxicity data
- PubChem — transport information
Sections 1.3 and 1.4 are withheld here because the supplier and emergency contact blocks carry your own company details in the draft you buy. Every draft needs review by a competent person before it is issued.
Measured values for Amorphous silica, and where each one comes from
26 measured values for 6 properties, read from 3 public databases. On 4 properties the records differ. Each reading is shown with its own record. Follow any record to read the value at its source.
Boiling point
3 records, 2230 to 2950 °C
Used with vapour pressure to judge how readily the substance reaches the air you breathe.
- 4046 °F
- NIOSH Pocket Guide
- 2950 °C @760 [mm Hg]
- PAC Chemical Database, U.S. Department of Energy
Melting point
3 records, 1710 to 1722 °C
Fixes the physical state at handling temperature, which the label and the transport class depend on.
- 3110 °F
- NIOSH Pocket Guide
Vapour pressure
3 records differ
The higher it is, the faster the substance evaporates into the workplace air at room temperature.
- approx 0 mm Hg
- Hazardous Substances Data Bank (HSDB)
- 10 mm Hg @ 1732 °C
- Hazardous Substances Data Bank (HSDB)
- 0 mmHg (approx)
- NIOSH Pocket Guide
Density
11 records differ
Needed to convert between mass and volume on the label, in transport papers and in a spill estimate.
- 2.2 @ 25 °C
- Hazardous Substances Data Bank (HSDB)
- Colorless crystals or white powder; odorless and tasteless; density: 2.2-2.6; soluble in molten alkai when finely divided and amorphous /Silicon dioxide/
- Hazardous Substances Data Bank (HSDB)
- Density = 2.648 /alpha-Quartz/ /from table/
- Hazardous Substances Data Bank (HSDB)
- Density = 2.269 /alpha-Tridymite/ /from table/
- Hazardous Substances Data Bank (HSDB)
- Density = 2.318 /alpha-Cristobalite/ /from table/
- Hazardous Substances Data Bank (HSDB)
- Density = 2.909 /Coesite/ /from table/
- Hazardous Substances Data Bank (HSDB)
- Density = 4.287 /Stishovite/ /from table/
- Hazardous Substances Data Bank (HSDB)
- 2.334 @25 °C
- PAC Chemical Database, U.S. Department of Energy
Solubility
5 records, each a different case
Determines spill behaviour, the right extinguishing media and the correct first-aid rinse.
- AMORPHOUS IS SOL IN ALKALIES, ESP WHEN FINELY DIVIDED
- Hazardous Substances Data Bank (HSDB)
- Very slightly sol in alkali
- Hazardous Substances Data Bank (HSDB)
- The external amorphous layer in quartz (the Beilby layer) is more soluble than the crystalline underlying core
- Hazardous Substances Data Bank (HSDB)
- Insoluble
- NIOSH Pocket Guide
Odour
1 record
Odour is a warning property only. Many substances are hazardous well below the concentration you can smell.
These are the public records read for Amorphous silica, published here unchanged. Where two records disagree, the draft you buy states the value and names the record behind it, so a reviewer can see what was chosen. Every draft needs review by a competent person before it is issued.
Get the full draft SDS for Amorphous silica
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