• Top library match: Menatetrenone #123713

• Direct literature assignments link peaks at 423, 444, 483, 564, and 598 cm⁻¹ to inorganic moieties (metal‑oxygen, silicon‑oxygen, phosphate), which cannot be explained by Menatetrenone alone.
• These inorganic absorptions are strong enough to suggest that the sample may contain mineral components, or that the library match is not the main spectral contributor.
• Library confidence is moderate (69%), and the best hit (Menatetrenone) does not account for several low‑wavenumber bands.
• Direct‑evidence peak assignments are derived from a wide range of material systems, many of which are not chemically related to naphthoquinones, lowering their reliability for this sample.
• The possibility of a mixture or a structurally related impurity cannot be excluded without additional analysis.

Recommended next steps: Obtain an independent molecular weight determination (e.g., LC‑MS or GC‑MS) to verify the presence of Menatetrenone or similar naphthoquinones. Examine the sample by X‑ray fluorescence or EDS to assess whether the inorganic signatures (Si, Ca, etc.) indicate a composite or contaminated material. If the sample is a mixture, consider fractional dissolution or chromatographic separation to isolate the organic component for a purer FTIR spectrum.