You Deserve to Know What’s in Your Bottle

Your skin absorbs what you put on it—it’s why you care about the quality of the products you use. And we’re right there with you.

That’s why we’re committed to sharing exactly what’s inside your Castor Oil, so you feel confident in every drop. No filters. No secrets. Just honest information to help you make informed choices.

This page is for you—to show what goes into your bottle of Queen of the Thrones® Castor Oil, and why it meets the highest possible standards for purity and quality.

What You Can Expect from Our Castor Oil

We only use 100% pure, cold-pressed, hexane-free, USDA certified organic Castor Oil, with no fillers, preservatives, or fragrance.

Our sourcing and packaging standards are designed to help protect the oil’s integrity from the moment it’s bottled to the moment it touches your skin. You can count on:

  • Cold-pressed extraction (no heat, no chemicals)
  • Bottling in amber glass to reduce light exposure
  • Third-party and functional testing to check for contaminants and quality markers

Because if it’s not something we’d use on ourselves, it doesn’t go into your bottle.

What We Test For

Here’s what makes our Castor Oil stand out as best in class:

  • Ricinoleic Acid Percentage This is the signature fatty acid that gives Castor Oil its unique properties. For cosmetic-grade Castor Oil, a ricinoleic acid content of 80–90% is considered high quality.
    In contrast, USP (United States Pharmacopeia) oral-grade Castor Oil must meet stricter standards, typically ranging between 85–92%, to ensure consistency, purity, and suitability for its intended use. A higher ricinoleic acid percentage is often associated with a higher-quality oil, based on current manufacturing and purity benchmarks.
  • Phthalates Screening — We make sure your oil is free from harmful plasticizers like DEHP, DBP, and others.
  • Acid, Iodine, Peroxide, and Saponification Values — These are important markers that show oil freshness, quality, and stability.
  • Residual Solvents — Confirming no hidden hexane or chemical residues remain from extraction or processing.
  • Fatty Acid Profile — This ensures your oil perfectly matches pure Castor Oil’s unique fingerprint, with no adulteration or dilution.
  • Heavy Metals & Contaminants — Tested to remain well within safe, acceptable limits despite natural environmental exposure.
  • Microbial & Stability Tests — Demonstrating your oil stays clean, shelf-stable, and effective over time without preservatives, thanks to its naturally low water activity.

The Latest Test Results

Here are the most recent lab reports for the Castor Oil batches shipped across the U.S. and Canada. These results are shared so you can see the data for yourself—because you deserve full transparency, not just promises.

Phthalates Certificates

✅ Result: Not Detected (ND) for all major phthalates, including DEHP, DBP, DINP, DCHP, and others.

Heavy Metals Report

✅ Result: Below detection limits for arsenic, cadmium, lead, and mercury — fully compliant with safety thresholds.

Residual Solvents Report

✅ Result: Compliant for all Class 1, 2, and 3 solvents under USP <467> — no concerning levels detected.

Fatty Acid (FAMEs) Profile

✅ Result: Ricinoleic acid measured at ~84.8% (target 85–92%), with balanced supporting fatty acids — slightly below USP spec but consistent with high-quality performance.

A Note About USP Standards vs. Topical Use Standards

You might have heard about USP (United States Pharmacopeia) standards, which are created for Castor Oil used in pharmaceuticals or food products. These standards require a ricinoleic acid content of 85.0%–92.0% (see USP reference).

But here’s what’s important: topical-use Castor Oil has different quality considerations. Oils intended for cosmetic and self-care use often show slightly more natural variability in ricinoleic acid content. A range in the mid 80s to 90% is still consistent with high-quality topical Castor Oil, especially when supported by clean sourcing, organic certification, and gentle extraction methods like hexane-free cold pressing.

Queen of the Thrones® Castor Oil, with a tested ricinoleic acid level of ~84.8%, fits beautifully within these expectations—making it an ideal choice for your self-care and cosmetic rituals.

Microbial & Stability Safety

✅ Microbial Suitability: Passed USP methods for detecting pathogens (C. albicans, Pseudomonas, Staphylococcus, E. coli).

✅ Microbiological Contamination: <10 cfu/g total microbial count — very clean.

✅ Water Activity: 0.18 — too low to support microbial growth; no preservatives needed.

✅ 12-Week Stability: No significant change in odor, color, weight, or appearance under accelerated storage.

Additional Tests (Shared for Full Transparency)

These tests are primarily for EU/UK compliance, but we share them here to give you the full picture.

✅ Cosmetic Product Safety Report (CPSR): Confirms safety under EU Regulation 1223/2009.

✅ ISO 11930 Antimicrobial Protection Tests: Designed for water-based products; non-conformance is expected and acceptable for a pure oil.

A Simple Promise: Quality You Can Trust


Choosing a bottle of Castor Oil from Queen of the Thrones® means choosing a product that’s been tested, traced, and thoughtfully packaged with your wellness in mind.

Because your self-care deserves nothing less.