Aerosil (Colloidal Silicon Dioxide) — Pharma Excipient Supplier, Hyderabad
Product Overview
Colloidal Silicon Dioxide (Aerosil) is a fumed silica excipient widely used as a glidant, anti-caking agent, and adsorbent in pharmaceutical tablet and capsule formulations. Its high surface area and low bulk density make it highly effective at improving powder flow and preventing caking at low use levels (0.1–0.5%). Available in IP, BP, EP, and USP grades.
Specifications
| CAS Number | 7631-86-9 |
| Molecular Formula | SiO₂ |
| Molecular Weight | 60.08 g/mol |
| Appearance | White fluffy amorphous powder |
| Surface Area | 175–225 m²/g |
| Loss on Drying | NMT 2.5% |
| pH (4% dispersion) | 3.5–5.5 |
| Grades | IP / BP / EP / USP |
| Packaging | 10 kg / 20 kg bags |
Applications
- Glidant in tablet and capsule formulations
- Anticaking agent in powder blends
- Adsorbent for liquid active ingredients
- Thickening agent in topical gel formulations
- Flow aid in dry powder inhaler (DPI) formulations
- Suspending agent in oral liquid preparations
Why Source from Surravi Phharma?
- Ready stock maintained in our centralised AC warehouse, Hyderabad
- IP / BP / EP / USP grades available
- Complete documentation: COA, MSDS, Regulatory certifications
- Flexible quantities — lab scale to bulk commercial
- Prompt delivery with pan India logistics support
Frequently Asked Questions
Where can I buy Aerosil (Colloidal Silicon Dioxide) IP/USP grade in Hyderabad?
Surravi Phharma supplies Aerosil (Colloidal Silicon Dioxide) in IP, BP, EP, and USP grades in Hyderabad with ready stock. It is widely used as a glidant and anti-caking agent in tablet and capsule manufacturing. Call +91 8008002576 or WhatsApp for bulk pricing, COA, and MSDS.
What is the typical use level of Aerosil (Colloidal Silicon Dioxide) as a glidant?
Colloidal Silicon Dioxide is an extremely effective glidant at very low concentrations — typically 0.1–0.5% w/w of the tablet blend. Above 0.5% it can reduce compressibility. Even at 0.1%, its high surface area significantly improves powder flow by reducing inter-particle friction and preventing powder bridge formation in hoppers and feed frames.
What is the difference between Aerosil and Cab-O-Sil in pharma formulations?
Aerosil (by Evonik) and Cab-O-Sil (by Cabot) are two leading brand names for fumed colloidal silicon dioxide used in pharma. They are functionally equivalent and both meet IP/BP/EP/USP specifications for Colloidal Silicon Dioxide. Selection is based on local availability, supplier qualification, and cost. Our supply meets the full pharmacopoeial specification for Colloidal Anhydrous Silica.
Can Colloidal Silicon Dioxide be used to adsorb liquid APIs onto powder?
Yes. Colloidal Silicon Dioxide has an extremely high surface area (175–225 m²/g) and can adsorb liquid oils and oily API solutions onto its surface to convert them into free-flowing powders. This technique — called liquid adsorption or powder adsorption — is used for poorly soluble lipophilic APIs such as Vitamin D3 oil, CoQ10, and essential fatty acids before blending them into tablets or capsules.
Is Colloidal Silicon Dioxide the same as Silicon Dioxide used in food supplements?
They are the same chemical compound (SiO₂) but manufactured by different processes. Colloidal Silicon Dioxide (fumed silica) is produced by flame hydrolysis and has extremely high surface area and specific properties critical for pharma glidant function. Precipitated Silicon Dioxide and diatomaceous earth are alternative forms used in food but are not interchangeable in pharma tablet manufacturing.