# NMR Solvent Impurities

> NMR Solvent Impurities (iPhone/iPad app by ilker UN.)

- Source: https://appshunter.io/ios/app/nmr-solvent-impurities/id6817373435 (this page in markdown: same URL + `.md`)
- Developer: [ilker UN](https://appshunter.io/developer/6817373437)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 20 MB
- Languages: English, Turkish
- Released: 2026-10-03
- Data updated: 2026-10-08

## What is NMR Solvent Impurities?

Is there a peak in your NMR spectrum you cannot assign? NMR Solvent Impurities is a fully offline reference for quickly identifying the residual signals of deuterated solvents and the trace impurities commonly met in the lab.

PEAK SEARCH
• Single peak: choose the solvent, the chemical shift (ppm, ± tolerance) and the splitting (singlet, doublet, triplet, quartet, multiplet…). Exact matches come first, compatible splittings next; incompatible ones are left out.
• Multiple peaks: enter several peaks from your spectrum with their splittings, or paste a list such as "2.05 s; 4.12 q; 1.26 t". Impurities are ranked by the number of matching signals, closeness and splitting agreement.
• The solvent's own residual peaks and the water peak are searched too.

SOLVENTS
• 20 deuterated solvents: residual ¹H and ¹³C peaks, J(H,D) and J(C,D) values, water/HOD peak, density, melting and boiling point, dielectric constant and storage conditions.
• Temperature-dependent HDO shift calculator for D₂O.

IMPURITIES
• More than 3000 ¹H and ¹³C values for 86 common impurities in 12 deuterated solvents.
• Search by English or Turkish name, abbreviation (EtOAc, DCM, THF…) or formula.
• The source publication of every value is shown.

CHEM21 GREEN CHEMISTRY GUIDE
• Safety, health and environment scores of 75 solvents and their ranking from "recommended" to "highly hazardous".
• An explanation of how the scores are obtained.

RECORDS
• Save search results with a sample name, analysis date and note, and mark the impurities you identified in the spectrum.
• Come back to your records any time, edit them, or copy them as text into your report.
• Records are stored only on your device.

MORE
• English and Turkish interface, six colour themes, light and dark mode.
• No internet connection needed; no account, no ads, no data collection.
• Free and open source (GPL-3.0).

SOURCES
The data were compiled from the peer-reviewed literature and a manufacturer's solvent chart:
• H. E. Gottlieb, V. Kotlyar, A. Nudelman, J. Org. Chem. 1997, 62, 7512.
• G. R. Fulmer et al., Organometallics 2010, 29, 2176.
• N. R. Babij et al., Org. Process Res. Dev. 2016, 20, 661.
• D. Prat et al., Green Chem. 2016, 18, 288 (CHEM21).
• Cambridge Isotope Laboratories, NMR Solvent Data Chart.

Chemical shifts can vary with concentration, temperature and pH; consult the original sources and your own measurements for a definitive assignment. This app is not affiliated with the publishers or with Cambridge Isotope Laboratories.

Developer: Dr. İlker ÜN

## Is NMR Solvent Impurities safe?

Not enough ratings yet to assess NMR Solvent Impurities.

## Is NMR Solvent Impurities legit?

NMR Solvent Impurities has limited verification signals. The AppsHunter Legitimacy Score for NMR Solvent Impurities is 40 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-10-03

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-08.*