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Substance Name: Silicon, elemental
RN: 7440-21-3
UNII: Z4152N8IUI
InChIKey: XUIMIQQOPSSXEZ-UHFFFAOYSA-N

Note

  • A trace element that constitutes about 27.6% of the earth's crust in the form of SILICON DIOXIDE. It does not occur free in nature. Silicon has the atomic symbol Si, atomic number 14, and atomic weight [28.084; 28.086].

Molecular Formula

  • Si

Molecular Weight

  • 28.086
 

Classification Codes

Classification Codes

  • Growth Substances
  • Micronutrients
  • Skin / Eye Irritant
  • Trace Elements

Superlist Classification Codes

  • TWA (15 mg/m3 total dust; 5 mg/m3 respirable fraction)
  • TWA 10 mg/m3

Names and Synonyms

Name of Substance

  • Silicon
  • Silicon, elemental

MeSH Heading

  • Silicon

Synonyms

  • CCRIS 6599
  • Defoamer S-10
  • EC 231-130-8
  • EINECS 231-130-8
  • HSDB 5033
  • Polyeristalline silicon powder
  • Silicon
  • Silicon metal
  • UNII-Z4152N8IUI

Systematic Names

  • Silicon
  • Silicon, containing more than 99.99 per cent by weight of silicon
  • Silicone

Superlist Names

  • Silicon
  • Silicon dust
  • Silicon powder, amorphous
  • Silicon powder, amorphous [UN1346] [Flammable solid]
  • UN1346

Registry Numbers

CAS Registry Number

  • 7440-21-3

FDA UNII

  • Z4152N8IUI

Other Registry Numbers

  • 152284-21-4
  • 157383-37-4
  • 160371-18-6
  • 17375-03-0
  • 71536-23-7
  • 72516-01-9
  • 72516-02-0
  • 72516-03-1
  • 90337-93-2

System Generated Number

  • 0007440213

Structure Descriptors

InChI

1S/Si

InChIKey

XUIMIQQOPSSXEZ-UHFFFAOYSA-N

Smiles

[SiH4]

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD50 oral 3160mg/kg (3160mg/kg)   FAO Nutrition Meetings Report Series. Vol. 53A, Pg. 21, 1974.
rat LDLo intraperitoneal 500mg/kg (500mg/kg) SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY STIMULATION

SENSE ORGANS AND SPECIAL SENSES: OTHER CHANGES: OLFACTION
National Technical Information Service. Vol. OTS0536164,