CAS 111-11-5 corresponds to methyl octanoate, a colorless to pale yellow oily liquid used as a food flavoring and organic synthesis intermediate.

Core Information
- Chinese Name: Methyl Caproate (Alternative Names: Methyl Octanoate, Methyl Caproate)
- English name: Caprylic acid methyl ester / Methyl octanoate / Methyl caprylate
- Molecular formula: C₉H₁₈O₂; Molecular weight: 172.24 (some sources incorrectly list it as 158.24, but the correct value based on C9 calculation is 172.24)
- Physical and Chemical Properties: Boiling point approximately 194–195°C (at atmospheric pressure), melting point -37.3°C, insoluble in water but soluble in ethanol and ether; possesses wine, orange, and fruity aroma
- Primary Uses: Formulation of pineapple, berry, and other fruit-type edible flavors (GB 2760 permitted); intermediate in cosmetics and pharmaceutical synthesis; potential biodiesel component
- Safety: GRAS (Generally Recognized As Safe) grade, naturally present in strawberries, pineapples, and iris root

Precautions
Some publicly available data incorrectly lists the molecular weight as 158.24 (the correct value for C9H18O2 is 172.24), and there is also an anomalous record of a boiling point at 79°C (which actually corresponds to reduced pressure or a recording error). Please refer to standard physical property data for accuracy.

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Methyl caprylate CAS 111-11-5
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