disodium;4-acetamido-5-hydroxy-6-phenyldiazenylnaphthalene-1,7-disulfonate
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disodium;4-acetamido-5-hydroxy-6-phenyldiazenylnaphthalene-1,7-disulfonate
Material direction: aromatic / sulfate
Sample & Measurement Parameters
Identification Result
79%The library search identifies disodium;4-acetamido-5-hydroxy-6-phenyldiazenylnaphthalene-1,7-disulfonate as the closest match. The spectrum is consistent with an azo dye-type structure containing aromatic rings, amide, and sulfonate groups, although the library confidence is moderate (68%) and several top‑15 candidates include proteinaceous materials, suggesting a possible mixture or impurity FTIR In-Depth Interpretation was not selected for this task, so this section shows the library-search result only and no deep AI interpretation was run.
Detailed interpretation
- Top library match: disodium;4-acetamido-5-hydroxy-6-phenyldiazenylnaphthalene-1,7-disulfonate #134826
- The library match confidence is only moderate (0.685), and several top‑15 candidates (gelatin, mucin, gluten) are proteinaceous, indicating that biological contamination or a mixture cannot be ruled out.
- The exact substitution pattern, position of the azo linkage, and counterion (sodium) cannot be confirmed by FTIR alone.
- The broad O–H/N–H band and the presence of protein‑like amide bands raise the possibility of a mixed sample with biopolymers.
Library Comparison
Library Search Results — Top 15 Candidates
| Rank | Match % | Compound | SMILES | Spectrum No. | Action |
|---|---|---|---|---|---|
| Loading library candidates... | |||||
Peak Analysis
★ = Literature-supported assignment| # | Wavenumber (cm⁻¹) | Absorbance | Assignment | Citation | Assignment status | |
|---|---|---|---|---|---|---|
| 1 | · | 3445 | 1.00 | - | - | - |
| 2 | · | 3445 | 1.00 | - | - | - |
| 3 | · | 1651 | 0.74 | - | - | - |
| 4 | · | 1559 | 0.57 | - | - | - |
| 5 | · | 1542 | 0.51 | - | - | - |
| 6 | · | 1573 | 0.50 | - | - | - |
| 7 | · | 1385 | 0.45 | - | - | - |
| 8 | · | 1520 | 0.44 | - | - | - |
| 9 | · | 1451 | 0.38 | - | - | - |
| 10 | · | 1399 | 0.36 | - | - | - |
| 11 | · | 2360 | 0.25 | - | - | - |
| 12 | · | 1081 | 0.25 | - | - | - |
| 13 | · | 1260 | 0.25 | - | - | - |
| 14 | · | 1338 | 0.25 | - | - | - |
| 15 | · | 1035 | 0.23 | - | - | - |
| 16 | · | 2340 | 0.18 | - | - | - |
| 17 | · | 1162 | 0.17 | - | - | - |
| 18 | · | 669 | 0.16 | - | - | - |
| 19 | · | 2926 | 0.14 | - | - | - |
| 20 | · | 3734 | 0.08 | - | - | - |
| 21 | · | 3853 | 0.07 | - | - | - |
| 22 | · | 2854 | 0.07 | - | - | - |
| 23 | · | 473 | 0.06 | - | - | - |
| 24 | · | 521 | 0.06 | - | - | - |
| 25 | · | 3902 | 0.06 | - | - | - |
| 26 | · | 3838 | 0.05 | - | - | - |
| 27 | · | 420 | 0.05 | - | - | - |
| 28 | · | 3819 | 0.04 | - | - | - |
| 29 | · | 2119 | 0.04 | - | - | - |
Appendix — Raw Spectrum
Comments and follow-up evidence
Use this area to continue the interpretation, ask questions, or add extra verification evidence.