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Formulation and Assay of Semisolids: Salicylic and Benzoic Acid Ointment, Diclofenac Gel

semisolids ointment diclofenac gel
semisolids ointment diclofenac gel

1. Aim

To study the Year 3 practical formulation and assay of semisolids: salicylic and benzoic acid ointment, diclofenac gel using the assigned verified method and document its outcome. Actual product or compound must be entered in the student record.

2. Requirements

Instructor-approved master formula or monograph, authenticated sample or teaching data, calibrated apparatus, control and quality records, observation sheet, protective equipment, and local waste instructions. Use the approved master formula for substances, quantities, process settings, and software. Acceptance limits and any unconfirmed drug identity are to be recorded from the assigned current monograph or approved college method in the student record.

3. Theory

An ointment and a gel differ in base structure, mixing, drug distribution, and tests. The syllabus names products but not validated compositions. Appearance and pH alone cannot prove assay or content uniformity. A suitable sampling plan and product-specific method are required.

4. Procedure

  1. Confirm the exact syllabus entry and the instructor-selected compound, formulation, or test.
  2. Read the current approved method, risk controls, material identities, and equipment status before work.
  3. Confirm the assigned ointment or gel and approved formula. Observe supervised mixing, packaging, and sampling. Record physical properties and assay data with controls.
  4. Record raw observations, controls, sample identifiers, and any deviation without replacing missing values with assumptions.
  5. Calculate only where the validated method, units, and actual inputs support it.
  6. State the supported result and all missing details marked Record here.

5. Observation and calculation

Student record field Entry
Case or product Record here
Method Record here
Observation Record here
Inference Record here
Supervisor check Record here
Outcome Record here

Assumed values or observations for practice only: Assumed sample A assay is 98% and assumed sample B assay is 101%. Both invented readings illustrate the need to compare locations; uniformity criteria are specified in your college lab manual and instructor's method sheet. Every invented input and output is assumed and is not an actual manufacturing instruction or release result.

6. Output or final result

Submit a labelled semisolid sampling map and a conditional result. Record the supervised outcome here.

Teaching-lab safety: Any synthesis, manufacture, or testing requires teaching-lab supervision, approved hazards review, and local disposal. Sterile or injectable products are not for human use. Software-dependent work requires the approved lab system.

This page is a supervised-activity guide; it does not report a completed case.

7. Sources

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Theory notes: Pharm D Year 3, Pharmaceutical Formulations