Sorbitol IR Granules are pharmaceutical excipient granules based on d-sorbitol and developed in a granulated format for immediate-release oral formulation applications. Sorbitol, also known as d-glucitol, has the molecular formula C₆H₁₄O₆, molecular weight 182.17, and CAS Number 50-70-4. The current USP-NF monograph defines Sorbitol as containing 91.0% to 100.5% d-sorbitol, calculated on the anhydrous basis.
The designation IR, or Immediate Release, describes the intended performance of the finished formulation or granule system. Sorbitol itself is a highly water-soluble polyhydric alcohol and is not inherently an immediate-release system. The release behavior of finished Sorbitol IR Granules depends on particle size, granule structure, formulation composition, processing conditions, and other product-specific characteristics.
FCC describes sorbitol as occurring in forms including powder and granules and as very soluble in water. Sorbitol is also hygroscopic, making moisture management an important consideration during manufacturing and storage.
Sorbitol IR Granules are granulated pharmaceutical excipient materials containing d-sorbitol as the principal component and intended for immediate-release formulation applications.
Granulation converts the starting material into a controlled physical form that can provide defined particle characteristics for handling, blending, filling, and downstream pharmaceutical processing.
The IR designation should be used for a finished product that has been developed and evaluated for immediate-release performance. It should not be interpreted as a universal property of every sorbitol granule.
Sorbitol is a polyhydric alcohol used as a pharmaceutical excipient. Current USP-NF identifies Sorbitol as d-glucitol with formula C₆H₁₄O₆, molecular weight 182.17, and CAS Number 50-70-4.
The current USP-NF monograph specifies 91.0–100.5% d-sorbitol, calculated on the anhydrous basis. This chemical requirement relates to Sorbitol itself and should be distinguished from additional functional specifications applicable to finished Sorbitol IR Granules.
Sorbitol's high water solubility can be relevant to immediate-release formulation development. FCC describes sorbitol as very soluble in water and slightly soluble in ethanol, while also identifying its hygroscopic nature.
Immediate-release formulations are designed to make the formulation components available without an intentionally prolonged or delayed release mechanism.
For Sorbitol IR Granules, the immediate-release characteristics depend on the complete finished granule and formulation system. Factors such as granule size, porosity, density, moisture, excipient composition, compression conditions, and processing method can influence hydration and dissolution.
Specific dissolution or release claims should therefore be supported by finished-product testing rather than inferred solely from the presence of sorbitol.
Sorbitol is very soluble in water. This characteristic can support formulation systems where rapid interaction with an aqueous environment is desirable.
However, the water solubility of sorbitol does not by itself establish a specific dissolution time for Sorbitol IR Granules. Finished-granule performance can be affected by particle size, granule structure, binders, compression, coating, and other formulation components.
During product development, dissolution and disintegration testing can be used to establish the actual performance of the finished formulation.
Particle size is an important physical attribute for Sorbitol IR Granules. It can influence surface area, hydration, flowability, packing, blending, segregation, and dissolution behavior.
Product-specific particle-size parameters may include:
A controlled particle-size distribution can support consistent manufacturing and predictable physical behavior.
The actual D10, D50, D90 and granule-size limits should be based on the approved product specification.
Bulk density and tapped density are useful parameters for evaluating granulated pharmaceutical excipients.
Bulk density reflects the mass-to-volume relationship before standardized tapping, while tapped density provides information about packing behavior after tapping.
These characteristics can affect blending, hopper filling, capsule filling, tablet compression, packaging, and material handling.
Where actual measurements are available, Carr Index and Hausner Ratio can also be calculated to support evaluation of flow behavior.
Flowability is important when Sorbitol IR Granules are processed through pharmaceutical manufacturing equipment.
Flow can be influenced by:
Consistent flow can support more uniform feeding, blending, filling, and downstream processing.
Flowability should be evaluated using an appropriate validated method rather than assigned a generic classification without supporting data.
Sorbitol is hygroscopic, so moisture management is important for Sorbitol IR Granules.
Moisture can influence flowability, agglomeration, granule strength, packing behavior, and dissolution. Exposure to uncontrolled humidity may change the physical characteristics of the material.
The appropriate moisture specification should be determined from the actual product specification and stability data.
Packaging should provide appropriate protection against environmental moisture where required by the validated stability program.
The physical structure of the granule can influence its interaction with water and its downstream processing characteristics.
Important attributes may include:
These properties can affect wetting, dispersion, dissolution, and handling.
For an immediate-release product, the granule structure should be developed to support the intended formulation performance without introducing an unnecessary release-controlling barrier.
Sorbitol IR Granules can be evaluated in pharmaceutical formulation development where a water-soluble polyol excipient in a controlled granulated format is required.
Development studies may include:
The final formulation should be optimized according to its intended dosage form and performance requirements.
The manufacturing process can significantly influence the physical properties of Sorbitol IR Granules.
Important processing stages may include:
Process conditions should be controlled to produce consistent granule characteristics between batches.
The finished material should be evaluated against the approved specification before release for pharmaceutical formulation use.
Quality control of Sorbitol IR Granules should combine the applicable compendial requirements for Sorbitol with additional physical and functional specifications for the finished granulated product.
Current USP-NF specifies the identity and d-sorbitol content requirement for Sorbitol.
Finished-product quality evaluation may include:
Additional tests should be included only when supported by the approved product specification.
Sorbitol IR Granules can be evaluated for:
The actual application depends on the grade, formulation composition, processing conditions, and validated finished-product performance.
Sorbitol IR Granules are pharmaceutical excipient granules based on d-sorbitol and developed for immediate-release formulation applications.
Current USP-NF identifies Sorbitol as d-glucitol with CAS Number 50-70-4, formula C₆H₁₄O₆, molecular weight 182.17, and a d-sorbitol content requirement of 91.0–100.5% on the anhydrous basis.
FCC describes sorbitol as available in granular form, very soluble in water, and hygroscopic.
The IR performance of the finished granule system should be established through appropriate formulation and dissolution evaluation. It should not be assumed solely from the chemical identity of sorbitol.
Sorbitol IR Granules can provide a controlled granulated excipient format for pharmaceutical manufacturers and formulation developers working on immediate-release oral formulations.
| Parameter | Specification |
|---|---|
| Appearance | White to off-white granules |