Castor Oil – PP (Pressed Grade) is a mechanically extracted castor oil obtained from the seeds of Ricinus communis without solvent extraction. It represents a baseline industrial grade where natural castor oil chemistry is retained, making it suitable for applications that prioritize functionality over enhanced appearance or advanced refining.
Industrially, PP grade serves as a versatile base oil and intermediate for large-volume processing and downstream modification.
Product Overview
PP grade castor oil is produced by physical pressing of castor seeds, followed by basic clarification and filtration. This method preserves the intrinsic triglyceride structure rich in ricinoleic acid.
Common industrial forms:
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Liquid, pressed castor oil (PP grade)
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Application-aligned specifications (dependent on filtration and handling)
At a high level, PP grade differs from degummed or pale pressed grades by having wider tolerance for natural color and non-glyceride components, while still delivering the characteristic viscosity and reactivity of castor oil.
Manufacturing Process (High Level)
The production of Castor Oil – PP follows a straightforward, non-proprietary industrial pathway.
1. Raw Material Sourcing
Castor seeds are sourced from established agricultural regions with monitored storage and handling practices.
2. Mechanical Pressing
Oil is extracted through pressing, separating oil from solid meal without solvent use.
3. Clarification & Filtration
Basic settling and filtration remove suspended solids and residual particulates.
4. Conditioning & Packaging
The oil is conditioned for storage or further processing and packed accordingly.
5. Quality Control Stages
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Incoming seed inspection
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In-process monitoring
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Final batch testing prior to dispatch
Specific operating conditions or proprietary methods are not disclosed.
Key Properties & Technical Characteristics
The performance of PP grade castor oil depends on its inherent chemistry and consistency. Each property influences handling and end use.
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Appearance & Physical State – Yellow to amber viscous liquid; natural variation is acceptable within specification.
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Odour – Natural characteristic odour; suitable for industrial applications.
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Viscosity – Naturally high, contributing to lubricity and film formation.
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Specific Gravity – Indicates compositional consistency between batches.
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Acid Value – Reflects free fatty acid content typical of pressed oils.
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Hydroxyl Value – Represents reactive hydroxyl groups essential for chemical modification.
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Iodine Value – Indicates degree of unsaturation and oxidation behavior.
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Saponification Value – Used to assess fatty acid chain composition.
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Moisture Content – Controlled to support storage stability.
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Unsaponifiable Matter – Monitored to ensure process suitability.
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Oxidation Stability – Relevant for storage and downstream processing.
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Typical Impurities Monitored – Residual solids, gums, and trace contaminants.
Typical Technical Parameters
| Parameter | Typical Indication |
|---|---|
| Appearance | Yellow to amber viscous liquid |
| Key Chemical Values | Typical range — confirm with Certificate of Analysis (COA) |
| Purity Indicators | Batch-specific, COA verified |
Exact numerical values depend on specification and must be confirmed with the COA.
Applications & End-Use Industries
Pharmaceuticals
Use case: Limited, process-oriented applications.
Why it works: Functional castor oil chemistry at pressed-grade specification.
Examples: Processing aids and intermediate systems (application dependent).
Cosmetics & Personal Care
Use case: Non-aesthetic-sensitive formulations.
Why it works: Lubricity and dispersing properties.
Examples: Soaps, basic personal care products.
Lubricants & Greases
Use case: Base oil and blending component.
Why it works: High viscosity and natural lubricity.
Examples: Industrial lubricants, grease manufacturing.
Polymers & Resins
Use case: Renewable chemical intermediate.
Why it works: Preserved hydroxyl functionality supports modification.
Examples: Polyurethanes, modified resins.
Paints, Coatings & Adhesives
Use case: Functional oil component.
Why it works: Film-forming ability and compatibility with resin systems.
Examples: Industrial coatings, inks, adhesive blends.
Specialty & Other Industrial Uses
Use case: Feedstock for downstream castor derivatives.
Why it works: Predictable chemistry and availability.
Examples: Hydrogenated castor oil, fatty acids, esters.
Quality Standards & Compliance Practices
PP grade castor oil is supplied based on routine testing and batch verification, without unverifiable certification claims.
Common practices include:
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Acid value testing
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Moisture analysis
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Appearance and odour checks
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Batch traceability
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Availability of COA, TDS, and MSDS
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Quality systems aligned with generic ISO-style frameworks
Packaging, Storage & Export Handling
Common packaging options:
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HDPE drums
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IBC containers
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Bulk supply (application dependent)
Storage guidelines:
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Store in a cool, dry, sealed environment
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Protect from heat, air exposure, and moisture
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Shelf life depends on storage conditions
Export documentation typically includes:
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Commercial Invoice
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Packing List
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Certificate of Analysis (COA)
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MSDS
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Bill of Lading
HS Code: Provided on request
MOQ & Lead Time: Subject to grade, packaging, and incoterms; confirm at enquiry
Why Buyers Source Pressed Grade Castor Oil from India
India is a primary origin for castor seeds and castor oil. Gujarat functions as a major processing and export hub due to integrated agricultural sourcing, established oil processing infrastructure, and strong port connectivity, supporting traceable and consistent international supply.
Frequently Asked Questions (FAQs)
1. What does “PP” mean in castor oil?
It indicates Pressed Grade, produced by mechanical pressing.
2. How does PP grade differ from degummed or pale pressed grades?
PP grade has wider tolerance for color and natural components.
3. Is PP grade water-soluble?
No, it is insoluble in water.
4. How should it be stored?
In sealed containers, away from heat and moisture.
5. What affects shelf life?
Storage conditions and exposure to air.
6. Are batches tested before dispatch?
Yes, routine QC checks are performed.
7. Can specifications vary by application?
Yes, pressed-grade specifications may differ by use.
8. Is export documentation provided?
COA, MSDS, and standard export documents are available.
Technical Enquiries
For technical datasheets, samples, or commercial enquiries, buyers may contact Nova Industries at export@novaind.in.
