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Glycol/alkanolamine coolant mixture

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結果番号: 20260528110428364632024 所有者: luca.chiodaroli.83 コメント: 0
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FTIR ANALYSIS REPORT

FTIR Spectrum Analysis Report

No.: 20260528110428364632024 Date: 2026-05-28 09:17:39 Reported by: FTIR.fun Contact: [email protected]

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Top15

Similarity-ranked Top-15 library comparison

Library spectrum will appear here.
Library spectrum Interactive sample curve Move the pointer to show the vertical guide line.
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

Glycol/alkanolamine coolant mixture

Library direction
全体的な信頼度
#143491 Current rank 1 Library lead match 83.7%
Conclusion
  1. Top-15 library consensus includes Ethane-1,2-diol and triethanolamine-related compounds, supporting the glycol/alkanolamine material family.
  2. Related literature confirms that prominent aliphatic C–H stretches and broad O–H/N–H bands are commonly observed in polyol/amine mixtures.
  3. The bands at 2931 and 2875 cm⁻¹ are directly assigned in literature as CH₂ asymmetric stretching and CH₃ symmetric stretching, respectively, indicating aliphatic hydrocarbon chains.
Main limitation

No distinct carbonyl absorption near 1730 cm⁻¹ is observed; therefore methacrylate or ester structures are unlikely despite the AI-generated direction hint of methoxy/methacrylate.

Evidence & interpretation
Evidence

Key evidence

ライブラリリードマッチ
Coolant #143491 | match 83.7%
材料の方向性
Glycol/alkanolamine coolant mixture The sample spectrum is consistent with a commercial coolant formulation containing oxygenated organic components such as ethylene glycol and alkanolamines (e.g., triethanolamine). Prominent aliphatic C–H stretching bands, broad O–H/N–H absorption, and C–O stretching features support the presence of polyols and amines. The library search returns Coolant as the nearest match, with the Top-15 candidates dominated by ethanolamines and diols, corroborating this assignment.
Supporting peaks
878 cm-1 1035 cm-1 1066 cm-1 1238 cm-1 1449 cm-1 1513 cm-1 1612 cm-1 1911 cm-1
Supporting groups
methyl n_h aromatic c_o_single_bond oxygen nitrogen ch2_asymmetric_stretch ch3_symmetric_stretch
Support

Evidence supporting the conclusion

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

  1. The sample spectrum is consistent with a commercial coolant formulation containing oxygenated organic components such as ethylene glycol and alkanolamines (e.g., triethanolamine). Prominent aliphatic C–H stretching bands, broad O–H/N–H absorption, and C–O stretching features support the presence of polyols and amines. The library search returns Coolant as the nearest match, with the Top-15 candidates dominated by ethanolamines and diols, corroborating this assignment.
  2. Top-15 library consensus includes Ethane-1,2-diol and triethanolamine-related compounds, supporting the glycol/alkanolamine material family.
  3. Related literature confirms that prominent aliphatic C–H stretches and broad O–H/N–H bands are commonly observed in polyol/amine mixtures.
  4. The bands at 2931 and 2875 cm⁻¹ are directly assigned in literature as CH₂ asymmetric stretching and CH₃ symmetric stretching, respectively, indicating aliphatic hydrocarbon chains.
  5. The broad band centered near 3190 cm⁻¹ is attributable to overlapping O–H and N–H stretching modes, characteristic of the hydroxyl and amine groups in glycols and alkanolamines.
  6. Strong C–O stretching absorption appears at 1035 and 1066 cm⁻¹, typical of primary alcohols and ether linkages present in coolant components.
  7. The fingerprint region contains additional bands at 1238, 1449, and 1513 cm⁻¹, which are consistent with C–H bending and deformation modes of the aliphatic backbone.
  8. Major peak assignments include 2931: Related literature: Aliphatic C-H stretching (CH2 asymmetric, CH3 symmetric) | Direct reference: alkyl c h; aromatic; 3190: Related literature: O-H / N-H stretching region | Direct reference: aromatic; c o single bond; 2875: Related literature: Aliphatic C-H stretching (CH2 asymmetric, CH3 symmetric); 1066: Related literature: C-O stretching (ether/polysaccharide-like) | Direct reference: alkyl c h; aromatic.
Limitations

Evidence that limits the conclusion

  • No distinct carbonyl absorption near 1730 cm⁻¹ is observed; therefore methacrylate or ester structures are unlikely despite the AI-generated direction hint of methoxy/methacrylate.
  • A weak band at 2375 cm⁻¹ may arise from atmospheric CO₂ interference rather than a sample component.
  • The exact ratio of glycol to alkanolamine cannot be determined from FTIR data alone, and the presence of water or minor additives may influence the spectrum.
  • Differentiation between primary, secondary, and tertiary amine contributions is limited by the broad O–H/N–H envelope.
Recommendation

Suggested next verification

  • Compare the spectrum with reference spectra of known ethylene glycol/triethanolamine-based coolant formulations.
  • Consider GC-MS or NMR analysis to confirm the specific alkanolamine and glycol composition.
  • The band at 2375 cm⁻¹ may be due to CO₂; perform a nitrogen-purged background measurement or spectral subtraction to verify.
Peak analysis

Detected peaks and interpretation

★ = Literature-supported peak assignment.

Index Characteristic Wavenumber Absorbance Evidence One-line interpretation Citation Confidence
1 ★ 2931 1.00 文献サポート割り当て 2931 cm-1のバンドはalkyl/aliphatic C-H vibration[RC750]に割り当てられています。 [RC750] LLM信頼度
2 ★ 3190 0.98 アナロジー文献割り当て 3190 cm-1のバンドはhydroxyl O-H vibration[S8][S2]に割り当てられています。 [S8], [S2] LLM信頼度
3 ★ 2875 0.94 文献サポート割り当て 2875 cm-1のバンドはalkyl/aliphatic C-H vibration[RC542]に割り当てられています。 [RC542] LLM信頼度
4 ★ 1066 0.51 アナロジー文献割り当て 1066 cm-1のバンドはC-O vibration[S1][S3]に割り当てられています。 [S1], [S3] 全体的な信頼度
5 ★ 1035 0.49 文献サポート割り当て 1035 cm-1のバンドはC-O vibration[RC1869]に割り当てられています。 [RC1869] 全体的な信頼度
6 · 2375 0.45 - - - -
7 · 878 0.35 - - - -
8 · 1612 0.22 - - - -
9 · 2109 0.21 - - - -
10 · 1449 0.20 - - - -
11 · 1238 0.12 - - - -
12 · 1911 0.10 - - - -
13 · 1513 0.08 - - - -
14 · 3751 0.07 - - - -
15 · 1991 0.06 - - - -
16 · 3860 0.05 - - - -
Literature

References

No. Title DOI Page
[1] Sorokin 等 - 2023 - Carboxymethyl Cellulose-Based Polymers as Promisin - -
[2] Rukman 等 - 2019 - GO-Fe3O4 Nanocomposite from coconut shell Synthes - -
[3] Owonubi 等 - 2018 - Characterization and in vitro release kinetics of - -
[4] Liu 等 - 2020 - Use of Sulfur-Free Lignin as a novel soil additive - -
[5] Kulathuraan 等 - 2016 - Structural, optical and electrical characterizatio - -
[6] Elkhouly 等 - 2022 - An investigated organic and inorganic reinforcemen - -
[7] Caccamo 等 - 2020 - Self-Assembly Processes in Hydrated Montmorillonit - -
[8] Ashwar 等 - 2021 - Encapsulating probiotics in novel resistant starch - -
[9] Ashurov 等 - 2021 - Characterization of polysaccharides from Eremurus - -
[10] Abdullah 等 - 2014 - Effect of annealing process on the phase formation - -
[11] 0816 ftir cm_1 peak wos/bonamore 等 - 2001 - the distal heme pocket of escherichia coli flavohe.pdf - -
[12] Soulard 和 Tremblay - 2015 - Vibrational investigations of CO2-H2O, CO2-(H2O)(2 - -
[13] Rozi 等 - 2016 - Characterization of Ultraviolet-Photocured Acrylam - -
[14] Beatriz Gomez-Patino 等 - 2020 - Cutin fromSolanum MyriacanthumDunal andSolanum Acu - -
[15] Adeyi 等 - 2019 - Adsorption of Malachite Green Dye from Liquid Phas - -
[16] Ducic 等 - 2023 - Monitoring oocyte-based human pluripotency acquisi - -
[S1] Kert 等 - 2021 - Application of Fragrance Microcapsules onto Cotton - 13
[S4] Agbaje 等 - 2021 - Organic biopolymers of venus clams Collagen-relat - 5
[S5] Ledeti 等 - 2020 - Stability and Compatibility Studies of Levothyroxi - 6
[S6] Gurdebeke 等 - 2018 - The affiliation of Hexasterias problematica and Ha - 21
[S7] Gatica 等 - 2013 - BLENDS OF POLY(N-VINYL-2-PYRROLIDONE) AND DIHYDRIC - 5
[S8] Sha 等 - 2017 - High Electrocatalytic Behaviour of Ni Impregnated - 20
[RC542] Santos 等 - 2023 - Different Species of Marine Sponges Diverge in Ost - 7
[RC750] Almutairi 和 Ali - 2015 - Direct detection of saponins in crude extracts of - 4
[RC1869] Ramirez-Herrera 等 - 2021 - Influence of the Epoxy Resin Process Parameters on - 6
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): [(400, 4000)]

Raw spectrum without baseline correction or other processing:

Sample spectrum image
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