Stearic Acid (Pharmaceutical Grade)
CAS Number: 57-11-4
Pharmaceutical grade Stearic Acid is a saturated fatty acid used as a tablet and capsule lubricant, with slightly less sensitivity to over-lubrication than magnesium stearate. It is also used as a binder in wax matrix sustained-release tablets and as a coating agent. Available in multiple grades differing in stearic acid content to meet various pharmacopoeial specifications.
Technical Specifications
| appearance | White or almost white waxy powder |
| iodine value | ≤4.0 |
| heavy metals (ppm) | ≤10 |
| acid value (mg KOH/g) | 195–210 |
| assay (stearic acid, %) | 40.0–60.0 (Type 50) or ≥90.0 (Type 90+) |
Applications
- Tablet lubricant
- Wax matrix sustained-release binder
- Suppository base component
- Capsule fill lubricant
- Cosmetic and topical preparations
Key Features
- Lower over-lubrication risk vs. magnesium stearate
- Multiple stearic acid content grades
- Versatile for tablets, suppositories, and coatings
- USP/NF, EP compliant
Send Inquiry
CAS Number
57-11-4
Category
Pharmaceutical ExcipientsAvailability
In StockSample
Dispatched within 5 days
More in Pharmaceutical Excipients
Ascorbic Acid (Vitamin C, Pharmaceutical Grade)
50-81-7
Benzyl Alcohol (Pharmaceutical Grade Preservative)
100-51-6
Calcium Stearate (Pharmaceutical Grade)
1592-23-0
Carnauba Wax (Pharmaceutical Grade)
8015-86-9
Cellulose Acetate Phthalate (CAP)
9004-38-0
Citric Acid (Pharmaceutical Grade)
77-92-9
Colloidal Silicon Dioxide (Aerosil 200)
7631-86-9
Copovidone VA64 (Kollidon VA64)
25086-89-9