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Precipitated Silica USP NF FCC Food Grade Manufacturers

Anmol Chemicals Group, established in 1976, is the pioneer manufacturer of Specialty chemicals, Pharmaceutical Excipients, Fragrance & Flavor chemicals in India. Anmol Chemicals Group has manufacturing facilities spread across Western India, representatives in Houston Chicago USA, Dubai and UAE. We also have toll manufacturing units for processing chemicals in a few countries around the world. We make IP, BP, USP, Ph. Eur., FCC or Food Grade, Analytical Reagent Grade, LR or Laboratory Reagent Grade, Pure and Technical Grades of various chemicals. All our items are analyzed to meet the required standards. We can supply the material in grams for your laboratory trial and in tons for your plant scale jobs.

Our manufacturing facility is FDA approved and cGMP, GLP (FDA) Approved, ISO 9001, ISO 14001, ISO 17025, ISO 45001, ISO 22000, HACCP, FSSAI, FSSC 22000, Halal and Kosher certified. We are registered with "REACH" for export to European countries. Solid materials can be customized for particle size, shape and bulk density. We observe WHO Good Manufacturing Practice and Good Laboratory Practice. We are a STAR Export House and “Authorised Economic Operator” as per Indian customs.

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Precipitated Silica SDS of Manufacturers

Please visit Precipitated silica and also Fumed silica.

Precipitated Silica Manufacturers

Synonyms: Silicon Dioxide
CAS Number: 112926-00-8 or 7631-86-9, Molecular Weight: 60.08, Chemical Formula: SiO2, EINECS EC Number: 601-214-2, FEMA: ----,

Silicon dioxide is generally recognized as safe by the FDA. In the pharmaceutical industry, colloidal silicon dioxide is used in tablet-making, including use as an anti-caking agent, adsorbent, disintegrant, or glidant to allow powder to flow freely when tablets are processed.

Fumed silica also known as pyrogenic silica is a very fine particulate or colloidal form of silicon dioxide. It is prepared by burning SiCl4 in an oxygen-rich hydrogen flame to produce a "smoke" of SiO2.

Hydrophilic fumed silica is used with increasing success in high technology fields including pharmaceuticals, polyester, silicone, paints and coatings.

Hydrophobic fumed silica has a low moisture adsorption, excellent dispersibility, and ability to adjust rheological behavior, even that of polar systems.

Precipitated silica is an amorphous form of silica. It is a white, powdery material, produced by precipitation from a solution containing silicate salts. We offer it in various bulk density.

There is some confusion about nomenclature of silica as Precipitated silica or Fumed silica. The readers are advised to study both these pages.

The analysis Report of Particle Size of Precipitated Silica is produced below. You can enlarge it by increasing your view-ratio.
Precipitated Silica Particle Size
Here, D0.5 is 2.87 micrometer and D0.9 is 7.16 micrometer

Specifications of Silicon Dioxide USP NF Grade:
(This is a precipitated silica grade.)
Anhydrous 60.08

Silicon Dioxide is obtained by insolubilizing the dissolved silica in sodium silicate solution. Where obtained by the addition of sodium silicate to a mineral acid, the product is termed silica gel; where obtained by the destabilization of a solution of sodium silicate in such manner as to yield very fine particles, the product is termed precipitated silica. After ignition at 1000C for not less than 1 hour, it contains not less than 99.0 percent of SiO2.

Packaging and storage: Preserve in tight containers, protected from moisture.
Labeling: Label it to state whether it is silica gel or precipitated silica.
Identification: Transfer about 5 mg to a platinum crucible, mix with about 200 mg of anhydrous potassium carbonate, ignite at a red heat over a burner for 10 minutes and cool. Dissolve the melt in 2 mL of recently distilled water, warming if necessary, and slowly add 2 mL of ammonium molybdate: a deep yellow color is produced.
pH: between 4 and 8, in a slurry (1 in 20).
Loss on drying: Dry it at 145 for 4 hours: it loses not more than 5.0% of its weight.
Loss on ignition: Ignite about 1 g of it, previously dried and accurately weighed, at 1000C for not less than 1 hour: it loses not more than 8.5% of its weight.
Chloride: Boil 5 g in 50 mL of water under a reflux condenser for 2 hours, cool, and filter. A 7-mL portion of the filtrate shows no more chloride than corresponds to 1.0 mL of 0.020 N hydrochloric acid (0.1%).
Sulfate: A 10-mL portion of the filtrate obtained in the test for Chloride shows no more sulfate than corresponds to 5.0 mL of 0.020 N sulfuric acid (0.5%).
Arsenic: To pass the test. --- The limit is 3 ppm.
Heavy metals: To pass the test. --- The limit is 0.003%.
Assay: Transfer about 1 g of Silica Gel to a tared platinum dish, ignite at 1000 for 1 hour, cool in a desiccator, and weigh. Carefully wet with water, and add about 10 mL of hydrofluoric acid, in small increments. Evaporate on a steam bath to dryness, and cool. Add about 10 mL of hydrofluoric acid and about 0.5 mL of sulfuric acid and evaporate to dryness. Slowly increase the temperature until all of the acids have been volatilized and ignite at 1000C. Cool in a desiccator, and weigh. The difference between the final weight and the weight of the initially ignited portion represents the weight of SiO2.

Specifications of Silicon Dioxide FCC Food Grade:
Synthetic Amorphous Silica
SiO2 Formula wt 60.08
INS: 551 CAS: [7631-86-9]

Silicon Dioxide occurs as an amorphous substance that shows a noncrystalline pattern when examined by X-ray diffraction. It is produced synthetically, either by a vapor-phase hydrolysisprocess, yielding fumed silica, or by a wet process, yielding precipitated silica, silica gel, colloidal silica, or hydrous silica. Fumed silica is produced in an essentially anhydrous state, whereas the wet-process products are obtained as hydrates or contain surface-adsorbed water.
Fumed silica occurs as a white, fluffy, nongritty powder of extremely fine particle size and is hygroscopic. The wet process silicas occur as white, fluffy powders or as white, microcellular beads or granules and are hygroscopic or absorb moisture from the air in varying amounts. All these forms of Silicon Dioxide are insoluble in water and in organic solvents but they are soluble in hydrofluoric acid and in hot, concentrated solutions of alkalies.
Function: Anticaking agent; defoaming agent; carrier; conditioning agent; chillproofing agent in malt beverages; filter aid.

A. Place about 5 mg of sample into a platinum crucible, mix with 200 mg of anhydrous potassium carbonate and ignite over a burner at a red heat for about 10 min. Cool, dissolve the melt in 2 mL of freshly distilled water, warming if necessary, and slowly add 2 mL of ammonium molybdate. A deep yellow color appears.
B. Place 1 drop of the solution from Identification Test A on a filter paper and evaporate the solvent. Add 1 drop of a saturated solution of o-toluidine in glacial acetic acid and place the paper over ammonium hydroxide. A green-blue spot develops.
Assay: Fumed Silica: Not less than 99.0% of SiO2 after ignition; Precipitated Silica, Silica Gel, and Hydrous Silica: Not less than 94.0% of SiO2 after ignition.
Lead: Not more than 5 mg/kg.
Loss on Drying: Fumed Silica: Not more than 2.5%; Precipitated Silica and Silica Gel: Not more than 7.0%; Hydrous Silica: Not more than 70.0%; Colloidal Silica: Not more than 85.0%.
Loss on Ignition: Fumed Silica: Not more than 2.0% after drying; Silica Gel, Hydrous Silica, and Precipitated Silica: Not more than 8.5% after drying.
Soluble Ionizable Salts (as Na2SO4): Precipitated Silica, Silica Gel, and Hydrous Silica: Not more than 5.0%.

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Last updated 1-apr-21

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Precipitated Silica
USP NF FCC Food Grades Manufacturers
Precipitated Silica