Silicon Dioxide

Silicon dioxide is white crystals or powder. Silicon dioxide is also known as Silica. Silicon dioxide has a variety of applications: to control a product’s viscosity, add bulk, and reduce a formulation’s transparency. It can also function as an abrasive. In addition, it can act as a carrier for emollients, and may be used to improve a formulation’s skin feel.

Identification:

Product Name: Silicon dioxide

CAS: 7631-86-9

Synonyms: Silica

Molecular Formula: SiO2

Molecular Weight: 60.08

EINECS: 231-545-4

Properties：

Melting point: >1600 °C(lit.)

Boiling point: >100 °C(lit.)

density: 2.2-2.6 g/mL at 25 °C

refractive index: 1.46

Fp: 2230°C

storage temp.: Refrigerator (+4°C)

solubility: Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides.

form: suspension

color: White to yellow

PH: 5-8 (100g/l, H2O, 20℃)(slurry)

Water Solubility: insoluble

Sensitive: Hygroscopic

Merck: 14,8493

Stability: Stable.

Specification:

Appearance: Loose white powder, no sense

Identification: Conforms

Fineness: Conforms

Assay(SiO2): 99.0% min

PH: 5.0-7.5

Chloride: 0.1% max

Loss on ignition: 8.5% max

Loss on drying: 5.0% max

Arsenic: 0.0003% max

Heavy metals: 0.003% max

Iron salt: 0.015% max

Sulfate: 0.5% max

Bioburden

Total microbial count: 1000cfu/g max

Total mold and yeast: 100cfu/g max

Escherichia coli: Negative

Product Package:

net weight 10kg per fiber drum

Product Storage:

Put in a sealed, dry and ventilated place, Guard Against Fire.

Application:

The product has large specific surface area, good fluidity, strong adsorption to drugs, strong hydrophilicity, and the dosage is 1% to accelerate the disintegration of the tablet, and the disintegration is extremely fine, which is beneficial to the drug. Absorption. This product is generally used as a glidant at a concentration of 0.15-3%. This product is especially suitable for oils and creams. The granules prepared by the granules have good fluidity and compressibility, and poor flow and sticking are rare.

Some photos of shipment: