The physical form and particle size are not determined for this product. Historical data suggests an average particle size of 0.22 mm with 98% being less than 0.315 mm. However, this testing is not performed routinely, nor is it included as a product specification.
18649
Silicon dioxide
acid washed
Synonym(s):
Cristobalite, Quartz, Sand, Silica
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1 KG
¥10,100
2.5 KG
¥19,200
About This Item
Linear Formula:
SiO2
CAS Number:
Molecular Weight:
60.08
MDL number:
UNSPSC Code:
12352303
PubChem Substance ID:
NACRES:
SB.52
Recommended Products
form
solid
quality
acid washed
impurities
≤0.01% in acid soluble iron (Fe)
≤0.5% soluble in HCl
loss
≤0.5% loss on ignition, 800 °C
refractive index
n20/D 1.544 (lit.)
mp
1610 °C (lit.)
density
2.6 g/mL at 25 °C (lit.)
anion traces
chloride (Cl-): ≤100 mg/kg
SMILES string
O=[Si]=O
InChI
1S/O2Si/c1-3-2
InChI key
VYPSYNLAJGMNEJ-UHFFFAOYSA-N
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General description
Silicon dioxide (SiO2) exists in three crystalline forms, namely quartz, tridymite and cristobalite. It reacts with hydrofluoric acid to form silicon tetrafluoride (SiF4) and water. Silicates are formed on reacting SiO2 with alkali melts.[1] SiO2 is the main component in glass, brick and concrete and also forms the insulator in silicon devices.[2] The alteration of the surface of SiO2 with (3-aminopropyl)triethoxysilane (APTES) for binding lactate dehydrogenase (LDH) to form an amino layer has been reported.[3] The silicon-silicon dioxide structure has been investigated at liquid nitrogen temperature by electron spin resonance spectra.[4]
Storage Class Code
11 - Combustible Solids
WGK
nwg
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
Regulatory Listings
Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.
ISHL Indicated Name
Substances Subject to be Indicated Names
ISHL Notified Names
Substances Subject to be Notified Names
JAN Code
18649-6X1KG:
18649-6X2.5KG:
18649-VAR:
18649-1KG:
18649-50KG-H:
18649-2.5KG:
18649-BULK:
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Iron trichloride/silicon dioxide reacts as oxidant or Lewis acid with phenol ethers.
Jempty TC, et al.
The Journal of Organic Chemistry, 46(22), 4545-4551 (1981)
Study of silicon-silicon dioxide structure by electron spin resonance I.
Nishi Y.
Japanese Journal of Applied Physics, 10(1), 52-52 (1971)
Pinpoint and bulk electrochemical reduction of insulating silicon dioxide to silicon.
Nohira T, et al.
Nature Materials, 2(6), 397-401 (2003)
Electronic structure of silicon dioxide (a review).
Nekrashevich SS and Gritsenko VA.
Physics of the Solid State, 56(2), 207-222 (2014)
Eagleson M.
Concise Encyclopedia Chemistry, 983-984 (1994)
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