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aliphatic hydrocarbon material consistent with polyethylene-like methylene-rich chains

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Nambari ya Matokeo: 20250522161800801480247 Mmiliki: publicuser Maoni: 1
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FTIR ANALYSIS REPORT

FTIR Spectrum Analysis Report

No.: 20250522161800801480247 Date: 2025-05-22 23:04:28 Reported by: FTIR.fun Contact: [email protected]

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Top15

Similarity-ranked Top-15 library comparison

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Top 15 candidates

Reference library candidates

Rank Match % Compound Name Formula / SMILES Library preview Action
Reference candidates load with this Top-15 workbench.

Based on the library matches and evidence above.

Conclusion

aliphatic hydrocarbon material consistent with polyethylene-like methylene-rich chains

General assessment
-
#14511 Initial rank 1 Current rank 1 Library lead match 0.0%
Conclusion
  1. Strong support for saturated aliphatic C-H functionality comes from the 2928/2919 and 2854 cm-1 bands.
  2. The 1458 cm-1 band supports abundant methylene groups in a chain-like hydrocarbon environment.
  3. Library consensus points toward n-h / methyl and includes several methylene-rich hydrocarbon candidates, with polyethylene-family entries among the leaders.
Main limitation

The current spectrum excerpt lacks additional characteristic bands needed to securely separate HDPE from other polyethylene grades or from other long-chain saturated hydrocarbons.

Evidence & interpretation
Evidence

Key evidence

Mechi inayoongoza ya maktaba
Polyethylene,high density #14511 | match 0.0%
Mwelekeo wa nyenzo
aliphatic hydrocarbon material consistent with polyethylene-like methylene-rich chains The spectrum is most consistent with a simple aliphatic hydrocarbon material dominated by methylene C-H vibrations, with a polyethylene-like profile as the nearest library direction. However, the library match quality is very weak and no direct reference or related-literature evidence independently confirms a specific polymer grade or exact identity, so the most supportable conclusion is a broader polyethylene-like methylene-rich hydrocarbon material rather than a firm entity assignment.
Support

Evidence supporting the conclusion

Only sample-relevant statements that support the present conclusion are shown here.

  1. The spectrum is most consistent with a simple aliphatic hydrocarbon material dominated by methylene C-H vibrations, with a polyethylene-like profile as the nearest library direction. However, the library match quality is very weak and no direct reference or related-literature evidence independently confirms a specific polymer grade or exact identity, so the most supportable conclusion is a broader polyethylene-like methylene-rich hydrocarbon material rather than a firm entity assignment.
  2. Strong support for saturated aliphatic C-H functionality comes from the 2928/2919 and 2854 cm-1 bands.
  3. The 1458 cm-1 band supports abundant methylene groups in a chain-like hydrocarbon environment.
  4. Library consensus points toward n-h / methyl and includes several methylene-rich hydrocarbon candidates, with polyethylene-family entries among the leaders.
  5. Observed bands at about 2928/2919 and 2854 cm-1 are characteristic of aliphatic C-H stretching from methylene-rich chains.
  6. The band near 1458 cm-1 is consistent with CH2 bending in saturated hydrocarbon materials.
  7. The Top-15 library pattern is dominated by long-chain hydrocarbon-like entries, including polyethylene, LDPE, chlorinated polyethylene, and long-chain alkyl/ester compounds, which collectively supports a methylene-rich aliphatic composition.
  8. The nearest named library hit is Polyethylene,high density, but all listed similarities are effectively non-discriminating, so the retrieval does not securely distinguish HDPE from other long-chain saturated hydrocarbon materials.
Limitations

Evidence that limits the conclusion

  • The current spectrum excerpt lacks additional characteristic bands needed to securely separate HDPE from other polyethylene grades or from other long-chain saturated hydrocarbons.
  • Several Top-15 candidates include functionalities such as ester, aromatic, halogenated, or nitrogen-containing structures, but the present peak list does not provide corresponding supporting bands for those narrower assignments.
  • Because the reported library similarities are all 0.000, the library result is not strong enough to justify a firm material identification at the entity level.
  • The available peaks support a methylene-rich aliphatic material but do not uniquely identify Polyethylene,high density.
  • The absence of broader spectral coverage leaves key discriminating regions untested, especially the fingerprint region and any bands that could confirm or exclude branching, oxidation, ester content, or halogen substitution.
  • Without stronger matching or independent reference evidence, the conclusion should remain at a polyethylene-like hydrocarbon direction.
Recommendation

Suggested next verification

  • Collect a full FTIR spectrum including the fingerprint region to check for the characteristic polyethylene rocking doublet near 730-720 cm-1 and to assess branching-sensitive features.
  • Inspect for any carbonyl absorption near 1700-1750 cm-1 to exclude long-chain esters or oxidized material suggested by some library candidates.
  • Check for C-Cl region absorption in the lower wavenumber range if chlorinated polyethylene is a practical alternative to exclude.
  • If polymer identification matters, compare against authenticated HDPE, LDPE, and generic polyethylene reference spectra measured under the same sampling conditions.
Peak analysis

Detected peaks and interpretation

★ = Literature-supported peak assignment.

Index Characteristic Wavenumber Absorbance Evidence One-line interpretation Citation Confidence
1 · 2919 1.00 - - - -
2 · 2928 0.44 - - - -
3 · 2854 0.35 - - - -
4 · 1458 0.13 - - - -
Appendix

Sample information and raw spectrum

Original uploaded spectrum for reference and verification.

Baseline correction method: Asymmetric Least Squares Smoothing

The wavelength range for analysis(cm-1): [(650, 4000)]

Raw spectrum without baseline correction or other processing:

Sample spectrum image
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  • 22 Mei '25

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