How can you identify HCl from FTIR?
This page summarizes the recurring FTIR evidence reported for HCl, including the most frequent peaks, supporting functional groups, and literature-backed interpretation patterns. It is a structured evidence page, not a claim of automatic single-spectrum certainty.
Backed by 11 cited sources
Quick answer
HCl is usually reported with a recurring pattern of peaks and functional-group evidence. The most useful approach is to cross-check at least two characteristic peaks before treating it as a match, then verify whether the full spectrum still fits the same material family.
Peak interpretation
Possible materials / groups
| Functional group | Evidence |
|---|---|
| Hydroxyl (O-H) | 11 |
| Aromatic ring | 9 |
| N h | 8 |
| Methacrylate | 5 |
| C-O single bond | 5 |
| Acetate | 5 |
| Methoxy (OCH3) | 4 |
| Carbohydrate | 3 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of HCl, repeated peak positions, and repeated functional-group associations. A strong material hypothesis should still be supported by multiple peaks that agree with each other, not by one headline band alone.
Real-world usage
This page is designed for polymer identification, incoming-material QC, unknown plastic analysis, recycled-content review, and literature-backed interpretation of reference spectra.
Common mistakes
- Calling a material match too early because one famous peak is present.
- Ignoring sample prep, fillers, oxidation, water, or additives that can change the apparent pattern.
- Using literature evidence without checking whether your own sampling mode and spectrum quality are comparable.
Verification advice
Use DSC, GC-MS, or TGA to validate the material hypothesis when the peak pattern is ambiguous or mixed.
Literature behind this page
-
confidence 4.8
HCl
Retrieval of Stratospheric HNO3 and HCl Based on Ground-Based High-Resolution Fourier Transform Spectroscopy DOI: 10.3390/rs13112159 -
confidence 3.6
HCl
Chiesa 和 Rossi - 2013 - The metastable HCl center dot 6H(2)O phase - IR sp DOI: 10.5194/acp-13-11905-2013 -
confidence 3.6
HCl
Iannarelli 和 Rossi - 2014 - H2O and HCl trace gas kinetics on crystalline HCl DOI: 10.5194/acp-14-5183-2014 -
confidence 3.6
HCl
Kohlhepp 等 - 2011 - Trends of HCl, ClONO2, and HF column abundances fr DOI: 10.5194/acp-11-4669-2011 -
confidence 3.6
HCl
Kohlhepp 等 - 2012 - Observed and simulated time evolution of HCl, ClON DOI: 10.5194/acp-12-3527-2012 -
confidence 3.6
HCl
High-yield cellulose hydrolysis by HCl vapor: cocrystallization, deuterium accessibility and hightemperature thermal stability DOI: 10.1007/s10570-020-03002-2 -
confidence 3.6
HCl
Hydrogen Chloride (HCl) Absorption by Raw Meal and Raw Meal Compounds, using In-situ HCl Generation and TGA-FTIR Tests DOI: 10.1016/j.jece.2018.102869 -
confidence 3.6
HCl
Sharma 等 - 2022 - Metal-organic framework ZIF-8 for exceptional HCl DOI: 10.1016/j.ijhydene.2022.04.244 -
confidence 2.8
HCl
Developing Further Versatility in Benzoxazine Synthesis via Hydrolytic Ring-Opening DOI: 10.3390/polym12030694 -
confidence 2.8
HCl
Fahim 等 - 2014 - A Green Approach for the Determination of Selected DOI: 10.5935/0103-5053.20140188
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