Castor Seed Oil

Castor Oil

INCI: Ricinus Communis (Castor) Seed Oil

Product Overview

Castor Oil is a viscous, high-functionality natural oil derived from the seeds of Ricinus communis. Its exceptionally high content of ricinoleic acid (≥85%) gives it unique chemical behavior compared to other vegetable oils—offering enhanced polarity, solubility, and emolliency. A staple in both traditional and advanced formulations, it is valued for its versatility across a wide range of cosmetic applications.

Sensory Characteristics

Appearance: Clear to pale yellow, medium-to-high viscosity liquid

Odor: Mild, fatty, slightly earthy odor characteristic of refined castor oil

Texture: Thick, cushiony, and slightly tacky; forms a protective film on the skin

Key Functional Attributes

Polar Emollient: Creates an occlusive, film-forming barrier that reduces transepidermal water loss (TEWL) and enhances long-lasting skin hydration.

High Solvency: Effective carrier for oil-soluble actives, dyes, and essential oils; improves pigment dispersion in decorative cosmetics.

Viscosity Modifier: Naturally thickens and structures anhydrous systems such as balms, ointments, and lip products.

Oxidative Stability: High stability due to low polyunsaturated content; suitable for formulations with extended shelf life.

Low Comedogenicity: Rating 1 – unlikely to clog pores; well-suited for sensitive and acne-prone skin.

Formulation Guidelines

Usage Range: 1–20% typical; up to 100% in oil-only systems

May impart tackiness—blend with esters or lightweight oils to enhance slip and after feel

Compatible with a wide range of emollients, waxes, and surfactants

Stable in pH 4–9 and under typical heating and emulsification conditions

Shelf Life: 24 months (sealed; store in a cool, dry environment)