• Top library match: Diethyl tetradecanedioate #43142

• The top library hit, Diethyl tetradecanedioate, has a similarity of 0.000, S-O the retrieval does not provide direct identification support.
• The library consensus note of "methyl / chlorine" is not convincingly supported by the observed peak list, which does not show clear identifying evidence for chlorinated functionality.
• The current evidence supports an ester class assignment, but it does not securely distinguish between a simple fatty ester, a diester, a glyceride-related ester, or a similar long-chain oxygenated aliphatic material.
• The weak 3006 cm⁻1 feature leaves open whether the sample is fully saturated or contains some unsaturation.
• Without stronger match quality or additional corroborating data, the specific library name cannot be treated as confirmed.

Recommended next steps: Re-run the FTIR with full-spectrum review and band intensities to confirm the ester C–O region and check for any overlooked bands that would distinguish monoester, diester, or hydroxyl-containing ester materials. Compare the sample against authenticated spectra of long-chain fatty esters and aliphatic diesters, including Diethyl tetradecanedioate, under the same measurement conditions. Use GC-MS or LC-MS, if the sample is extractable, to determine chain length distribution and whether the material is a single ester, a diester, or a mixture of fatty esters. If unsaturation is important to the application, verify the weak 3006 cm⁻1 feature with repeat FTIR or complementary NMR analysis.