• Top library match: dimethyl-di(prop-2-enyl)azanium chloride #13288

• Library similarity values are 0.000 throughout the leading candidates, S-O the library match is not strong enough for an entity claim.
• The sample evidence does not clearly confirm specific distinguishing features required for the named top hit, such as secure allylic or quaternary-ammonium-specific band patterns.
• The high-wavenumber broad bands could arise from amine, ammonium-associated moisture, alcohol, or other hydrogen-bonded functionality.
• The 1642 cm-1 feature is not unique and may reflect H-O-H bending, N-H bending, C=C-related absorption, or another overlapping mode.
• Because no reliable literature or high-quality library agreement is present, the exact identity and whether the material is a discrete small molecule, salt, or polymeric nitrogen-containing material remain uncertain.

Recommended next steps: Repeat the FTIR measurement after careful drying to determine whether the 3434-3443 and 1642 cm-1 bands are partly due to absorbed water. Inspect the fingerprint region with higher signal quality, especially approximately 1500-700 cm-1, for characteristic C-N, allylic, or ammonium-associated bands that could better separate amine, ammonium salt, and hydroxyl-containing possibilities. If the dimethyl-di(prop-2-enyl)azanium chloride assignment is important, confirm with a complementary method such as NMR or mass spectrometry, since the present FTIR evidence is not sufficiently specific. If an ionic ammonium material is suspected, compare against authenticated spectra of quaternary ammonium salts and related amine-containing standards measured under the same conditions.