---
title: "Dimethylamine (124-40-3): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/dimethylamine-124-40-3/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/dimethylamine-124-40-3/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/dimethylamine-124-40-3/
---

Hazard search

# Dimethylamine

CAS number

124-40-3

Also known as

Dimethylamine (DMA) · DMA · N,N-Dimethylamine

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 2 ppm |  |
| 8-hour TWA | 3.8 mg/m³ |  |
| 15-minute STEL | 6 ppm |  |
| 15-minute STEL | 11 mg/m³ |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **MDHS 96** / VOCs by solvent desorption and GC / [Method document (opens in a new tab)](https://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs96.pdf) | Active (pump) | Silica gel tube (150/75mg) | GC-FID | [226-10](https://analyt-mtc.com/catalog/product/skc-silica-gel-sorbent-tubes/#part-226-10) |
| **MDHS 104** / VOCs by solvent desorption and GC / [Method document (opens in a new tab)](https://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs104.pdf) | Active (pump) | Silica gel tube (150/75mg) |  | [226-10](https://analyt-mtc.com/catalog/product/skc-silica-gel-sorbent-tubes/#part-226-10) |
| **NIOSH 2010** / Aliphatic amines by GC-FID / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/2010.pdf) | Active (pump) | Silica gel tube (150/75mg) | GC-FID | [226-10](https://analyt-mtc.com/catalog/product/skc-silica-gel-sorbent-tubes/#part-226-10) |
| **OSHA 34** / Dimethylamine by HPLC / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-34.pdf) | Active (pump) | XAD-7 tube (80/40mg) | HPLC | [226-96](https://analyt-mtc.com/catalog/product/skc-xad-sorbent-tubes/#part-226-96) |
| **Non-agency** / Dimethylamine by Colorimetric analysis | Direct-reading | Gastec detector tube |  | [810-3H](https://analyt-mtc.com/catalog/product/gastec-colour-gas-detector-tubes/#part-gst-3h) / [810-180](https://analyt-mtc.com/catalog/product/gastec-colour-gas-detector-tubes/#part-gst-180) / [810-180L](https://analyt-mtc.com/catalog/product/gastec-colour-gas-detector-tubes/#part-gst-180l) |
| **Non-agency** / Dimethylamine by Colorimetric analysis | Passive | Gastec Dosi-tube |  | [810-3D](https://analyt-mtc.com/catalog/product/gastec-passive-dosi-tubes/#part-gst-3d) |
| **Non-agency** / Amines by HPLC / [Method document (opens in a new tab)](https://www.skcltd.com/products2/passive-samplers/umex-400-aiphatic-amines.html) | Passive | UMEx 400 Passive Sampler |  | 500-400 |
| **Other** | Passive |  | HPLC-UV | 500-400 |
| **Other** | Passive |  | DR | [810-3D](https://analyt-mtc.com/catalog/product/gastec-passive-dosi-tubes/#part-gst-3d) |

Methods and limits as published by their agencies and summarised by SKC; check the current method and the limit that applies to you before sampling.

Source: [SKC Ltd (UK), Hazard Search, used with SKC's permission (opens in a new tab)](https://www.skcltd.com/hazard-search.html); [SKC Inc. (USA), Sampling Guides, used with SKC's permission (opens in a new tab)](https://international.skcinc.com/sampling-guides/)