1. Direct Head-to-Head Specification Comparison — Typical specification (indicative)
Comparing more liquid grades? Explore the full 4-grade matrix in our Castor Oil Grades Comparison (Commercial, FSG, FPD & PPG) →
| Typical specification (indicative) | First Special Grade (FSG / BSS) | Commercial Grade | Impact on Formulation |
|---|---|---|---|
| Refining Process | Refined, Bleached, Vacuum Dried | Mechanical Expelling + Filtration | FSG removes gums, soaps, and phosphatides |
| Acid Value (mg KOH/g) | ≤ 2.00 (Typically ≤ 0.80) | ≤ 4.00 – 6.00 | Low acid in FSG prevents isocyanate consumption in PU |
| Colour (Lovibond 1" Cell) | ≤ 20.0 Y + 2.0 R (Pale Yellow) | Dark Yellow / Brownish | FSG prevents discoloration in clear coatings & resins |
| Moisture Content | ≤ 0.25% (or <0.08% special dried) | ≤ 0.50% | Crucial for bubble-free polyurethane casting |
| Hydroxyl Value (mg KOH/g) | 160 – 168 | 160 – 168 | Identical hydroxyl functionality preserved |
| Indicative HS Code | 1515.30 |
1515.30 |
Shared customs classification (Castor oil & fractions) |
Values are typical for this grade. Results for each lot are reported on its COA; specifications can be agreed per contract.
2. When to Formulate with FSG vs. Commercial Grade
- Polyurethane Foams & CASE: Low acid value and minimal moisture prevent side-reactions with isocyanates.
- High-End Alkyd Resins: Yields color-stable architectural and industrial stoving finishes.
- Plasticizers & Chemical Syntheses: Primary for consistent esterification and sulfonation stoichiometry.
- Lithium Grease Manufacture: Provides tighter penetration numbers and uniform fiber growth.
- Boundary Lubricant Blends: Two-stroke engine lubricants, gear oils, and wire-rope dressings where color is irrelevant.
- Metalworking Cutting Fluids: Water-miscible soluble oils and heavy drawing compounds.
- Rubber Compounding: Internal processing aid and vulcanization plasticizer.
- Cost-Sensitive Chemical Splitting: Raw feed for crude fatty acid distillation where color impurities are removed downstream.
Frequently Asked Technical Questions
Can FSG be substituted for Commercial Grade directly? +
Yes. FSG possesses higher purity, lighter color, and lower acidity than Commercial Grade, making it technically enhanced in every application. The choice is primarily economic based on budget and target performance.
Why is Commercial Grade cheaper than FSG? +
Commercial Grade is filtered crude expeller oil, bypassing chemical caustic refining, bleaching earth filtration, and vacuum drying, which reduces energy and processing costs.
What packaging is available for both grades? +
Both grades are packaged in 200 kg steel/HDPE drums, 1,000L IBC totes, and 20–22 MT flexitanks.
How does Nagdev Products ensure low moisture in FSG? +
Our automated vacuum drying columns strip moisture under vacuum (<50 mbar) at 105°C, monitored by in-line Karl Fischer titration.
What is the ordering procedure for commercial castor oil consignments? +
Submit projected monthly volume, packaging specifications, and delivery terms to nagdevproducts@gmail.com for formal contract allocation.
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Nagdev Products delivers technical lot-to-lot consistency backed by in-house laboratory Certificates of Analysis (COA). Request analytical samples and commercial quotes.