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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Reference substances

Reference substances

Currently viewing:
IUPAC name:
silicon

Inventory

EC number:
231-130-8
EC name:
Silicon
CAS number:
7440-21-3
CAS number:
7440-21-3
Synonyms
Names:
Metalic silicon
Silane
Silicane
Silicium
Silicon
Silicon metal
Silicone
Identifier:
CAS number
7440-21-3
Identifier:
CAS number
7440-21-3 silicon
Identifier:
IUPAC name
Elemental Silicon in alloys
Identifier:
IUPAC name
Elemental silicon
Identifier:
IUPAC name
Silicium
Identifier:
IUPAC name
Silicon
Identifier:
IUPAC name
silane
Identifier:
IUPAC name
silicium
Identifier:
IUPAC name
silicon
Identifier:
other: InChl
1S/Si
Identifier:
other: InChl
InChI=1/H4Si/h1H4
Identifier:
other: InChl
InChI=1/Si
Identifier:
other: InChl
InChI=1/Si
Identifier:
other: InChl
InChI=1S/Si
Identifier:
other: InChl
InChI=1S/Si AuxInfo=1/0/N:1/rA:1Si0/rB:/rC:;
Identifier:
other: InChl
InChl = 1/Si
Identifier:
other: SMILES notation
Si
Identifier:
other: SMILES notation
[SiH4]
Identifier:
other: InChl
lnChl=1/Si
Silicon

Molecular and structural information

Molecular formula:
Si
Molecular weight:
ca. 28.086
SMILES notation:
[Si]
InChl:
1S/Si
Structural formula:
Chemical structure

Related substances

Identifier:
CAS number
Identity:
7440-21-3