Hard Fat Type 36 (S) - Cost-Effective Suppository Base for High-Volume Production

High-volume suppository lines live or die by two numbers: cost per kilogram and melt consistency. Our Hard Fat Type 36 S is built for exactly that environment. With a melting range of 35–37 °C, it pours cleanly at standard molding temperatures and sets fast enough to keep your conveyor throughput high. The S designation denotes our standard industrial grade - fully compliant with pharmacopeial identity requirements but priced for manufacturers who buy in pallet quantities and do not need the full audit-trail package of our pharmaceutical-grade line.

We know that packaging space is money, so every carton is dimensioned to interlock on a standard EUR-pallet with zero dead volume. If you are currently paying a distributor markup on a comparable base, ask us for a side-by-side sample - the melt behavior will speak for itself.

Melt Profile and Batch Specifications

Pharmacopeial Name	Hard Fat (Mixed Fatty Acid Glycerides), Standard (Industrial) Grade, Type 36 - S standard grade
CAS Number	136626-73-8
Pharmacopeial Compliance	ChP 2025 (Part IV, Excipients)
Melting Range	30–45 °C, within ±2 °C of labeled value (labeled: 36 °C; ChP General Rule 0612, Method II)
Appearance	White or almost white waxy solid, faint characteristic fatty odor
Solubility	Freely soluble in dichloromethane; practically insoluble in water and ethanol
Acid Value	≤ 0.5 mg KOH/g (ChP General Rule 0713)
Hydroxyl Value	≤ 50 mg KOH/g, within ±5 of labeled value (labeled: 45); if labeled value < 5, measured value ≤ 5 (ChP General Rule 0713)
Iodine Value	≤ 2.0 (ChP General Rule 0713)
Peroxide Value	≤ 3.0 meq/kg (ChP General Rule 0713)
Saponification Value	215–260 mg KOH/g, 95 %–105 % of labeled value (labeled: 225; ChP General Rule 0713)
Unsaponifiable Matter	≤ 3.0 % (ChP General Rule 0713)
Alkaline Impurities	≤ 0.15 ml of 0.01 mol/L hydrochloric acid volumetric solution
Total Ash	≤ 0.05 % (ChP General Rule 2302)
Heavy Metals	≤ 20 ppm (ChP General Rule 0821, Method I) [industrial-grade limit]
Category	Pharmaceutical excipient, suppository base and release modifier
Storage	Protect from light, store at a temperature at least 5 °C below the labeled melting point
Labeling	Labeled values of melting point, hydroxyl value, and saponification value shall be stated on the certificate of analysis and packaging

The Workhorse Grade That Keeps Your Line Running

Lowest cost per kilogram in the catalog

Direct from our production floor - no distributor markup, no trading-company margin. If you are buying a comparable 36-type base through a middleman, our per-kilogram price will pay for the switch within the first container.

Universal melting point for most formulas

Labeled 36 °C (35–37 °C range) is the industry standard for immediate-release rectal and vaginal suppositories. If your current formulation runs on a 36-type base, you can qualify ours with a minimal bridging study.

Fast solidification = high throughput

The S-grade hydroxyl profile gives a balanced 3–4 minute set at 15 °C mold temperature. On a rotary line, that translates to more cycles per shift and fewer partially-filled molds at shift change.

Stock grade = 7–10 day lead times

We maintain a 30-tonne safety stock of Type 36 S. Standing-order clients get 30-day rolling reservation at no charge, so a customs delay on one shipment never stops your production.

Suited Production Environments

Type 36 S is the workhorse grade for contract manufacturers running generic rectal suppositories, glycerin-gelatin combination bases, and veterinary dosage forms. Its 35–37 °C melting point is close enough to body temperature for reliable in vivo release, yet high enough that finished suppositories do not deform in unconditioned warehouses during summer months.

For production, the recommended melt temperature is 45–50 °C; API addition should occur at 38–42 °C to avoid thermal degradation of heat-sensitive actives. The material exhibits minimal polymorphism compared with cocoa butter, which means you will not encounter the sudden batch-to-batch solidification-time shifts that force line recalibration.

Pallet Configuration and Reorder Cadence

All goods are securely packaged for safe, reliable transit. Container loading is optimized for both standard and high-capacity containers, with the exact configuration confirmed at order confirmation.

Questions Procurement Teams Ask Us

Q: Are there any special requirements for OEM purchases?

A: Yes, we require proof of trademark registration in order to print or emboss your trademark onto the product or packaging.

Q: What is the main application of this product?

A: It is mainly used as a suppository base for rectal and vaginal suppositories in the pharmaceutical industry. It is also applicable as a slow-release matrix, ointment substrate and solid-dispersion carrier.

Q: What do the suffixes S, H and W stand for?

A: S = high-solidification, low-hydroxyl type. H = high-hydroxyl-value type. W = moderate-hydroxyl-value, anti-brittleness type.

Q: What's is your shipping service?

A: We can provide services for vessel booking, goods consolidation, customs declaration, shipping documents preparation and delivery bulk at the shipping port.

Q: Can you provide DMF or supporting documents for overseas registration?

A: We supply COA, TDS, MSDS and production-audit documents. DMF-related supporting materials can be provided upon request.

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