Name: Silicon Dioxide 7631 - 86 - 9
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Silicon Dioxide 7631 - 86 - 9

Silica (white carbon black) is a widely used inorganic functional powder material, playing an irreplaceable role in numerous industries such as rubber, coatings, plastics, food, feed, agrochemicals, and cosmetics. Our products are manufactured in strict accordance with national and industry standards such as GB 25576-2020 and HG/T 3061-2020, and support third-party testing (SGS, BV, etc.). We can customize key indicators such as particle size, specific surface area, and oil absorption value according to customer application requirements. Leveraging major ports such as Tianjin Port, Qingdao Port, and Shanghai Port, we can efficiently arrange export sea freight, supporting small-batch trial orders and customized packaging.

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Classification

Inorganic Chemistry

INQUIRY

Properties Of Silicon Dioxide 7631 - 86 - 9

Melting point	>1600 °C(lit.)
Boiling point	>100 °C(lit.)
bulk density	200-800kg/m3
density	2.2-2.6 g/mL at 25 °C
vapor pressure	13.3hPa at 1732℃
refractive index	1.46
Fp	2230°C
storage temp.	2-8°C
solubility	Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides.
pka	6.65-9.8[at 20 ℃]
form	suspension
Specific Gravity	2.2
color	White to yellow
PH	5-8 (100g/l, H2O, 20℃)(slurry)
Odor	at 100.00?%. odorless
Resistivity	1∞10*20 (ρ/μΩ.cm)
Water Solubility	insoluble
Sensitive	Hygroscopic
Hydrolytic Sensitivity	6: forms irreversible hydrate
Crystal Structure	Trigonal
Merck	14,8493
Exposure limits	NIOSH: IDLH 3000 mg/m3; TWA 6 mg/m3
Stability:	Stable.
CAS DataBase Reference	7631-86-9(CAS DataBase Reference)
IARC	3 (Vol. Sup 7, 68) 1997
NIST Chemistry Reference	Silicon(iv) oxide(7631-86-9)
EPA Substance Registry System	Silica (7631-86-9)

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