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
EC number: 231-545-4
REACH registration number: Not required for substances manufactured/imported <1 tonne/year; otherwise confirm the active registrant number before external issue.
IUPAC name: dioxosilane
PubChem CID reference: 24261
Synonyms: SILICON DIOXIDE; Silica; Dioxosilane; Silicic anhydride; Diatomaceous silica; Wessalon; Zorbax sil; Silica, amorphous; Silica, colloidal; Sillikolloid
1.2 Relevant identified uses of the substance or mixture and uses advised against
Relevant identified uses: Laboratory reagent, industrial processing aid, formulation component, and internal product-stewardship review subject to supplier confirmation.
Uses advised against: Consumer, medical, food, or any other use not covered by the supplier's label, technical instructions, or exposure scenario.
Section 2 — Hazards Identification
2.1 Classification of the substance or mixture
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)
Flash point: Not available
Density: 2.2 @ 25 °C
Vapor pressure: 0 hPa
Water solubility: none
Log Pow (log Kow): Not available
Vapor density: Not available
Lower explosive limit: Not available
Upper explosive limit: Not available
Auto-ignition temperature: Not available
Viscosity: Not available
pH: Not available
9.2 Other information
Other information: Additional classification-supporting physical hazard data should be confirmed from the customer-specific product specification where required.
Sources
- 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
The draft covers all 16 sections under OSHA 29 CFR 1910.1200 and GHS Rev. 7, or the CLP EC 1272/2008 layout for the EU. Each draft arrives as an editable .docx and a PDF with an appendix naming the source of each value, in about 60 seconds. $5 per document, no account.