CAS 555-36-2 is iron (III) stearate (also known as iron octadecate), a trivalent metal soap formed by iron ions and stearic acid. It is mainly used as a photosensitizer and industrial additive for polyolefin photodegradation.

Core Information
-Chinese name: Iron stearate (also known as iron (III) stearate)
-English name: Iron (III) Steel
-Molecular formula: C ₅₄ H ₁₀₅ FeO ₆ (representing three molecules of stearic acid combined with one molecule of iron ion); Some materials are abbreviated as C ₁₈ H ∝₅ FeO ₂ (calculated as monomers, please pay attention to differentiation)
-Molecular weight: 906.25 (calculated in trisalt form)
-Appearance: Orange red to dark brown powder, non-toxic, odorless, tasteless, insoluble in water, soluble in hot organic solvents (such as ethanol, ether, chloroform), hygroscopic.
-Main application: As a photosensitizer for photo degradable polyolefin, it is widely used as a plastic additive for agricultural films, packaging bags, garbage bags, and other plastic additives; It is also used as an analytical reagent, paint drying agent, and PVC heat stabilizer component.

Precautions
There are two conventions for the chemical stoichiometry of this substance: the “monomer form” and the “three salt form”. The rigorous structural formula is iron tristearate (C ₅₄ H ₁₀₅ FeO ₆), but some industrial catalogs may label the molecular weight (approximately 339.3) according to the empirical formula (C ₁₈ H ③₅ FeO ₂). Please verify the specific specifications when purchasing or conducting experiments.

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CAS 555-36-2, iron tristearate (Ferric Stearate or iron stearate)
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