---
title: "2,4-Dichlorophenoxyacetic acid (94-75-7): sampling methods"
url: https://analyt-mtc.com/tools/hazard-search/2-4-dichlorophenoxyacetic-acid-94-75-7/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/2-4-dichlorophenoxyacetic-acid-94-75-7/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/2-4-dichlorophenoxyacetic-acid-94-75-7/
---

Hazard search

# 2,4-Dichlorophenoxyacetic acid

CAS number

94-75-7

Also known as

2,4-D · 2,4-D (2,4-dichlorophenoxyacetic acid) · 2,4-D (ISO) · 2,4-D acid · 2,4-Dichlorophenoxyacetic acid (2,4-D) · Hedonal · Trinoxol

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 10 mg/m³ |  |
| 15-minute STEL | 20 mg/m³ |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **NIOSH 5001** / 2,4-D by HPLC/UV / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/500124-D.pdf) | Active (pump) | 37mm Glass fibre filter in cassette | HPLC-UV | [225-709](https://analyt-mtc.com/catalog/product/glass-fibre-depth-filters/#part-225-709) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) / [225-706](https://analyt-mtc.com/catalog/product/glass-fibre-depth-filters/#part-225-706) |
| **NIOSH 5602** / Chlorinated & organonitrogen herbicides Iair sampling) by GC-ECD / [Method document (opens in a new tab)](https://www.cdc.gov/niosh/docs/2003-154/pdfs/5602.pdf) | Active (pump) | XAD-2 OVS-2 tube (270/140 mg) | GC-ECD | [226-58](https://analyt-mtc.com/catalog/product/skc-osha-versatile-sampler-ovs-tubes/#part-226-58) / [224-29V](https://analyt-mtc.com/catalog/product/skc-gas-and-vapour-sampling-accessories/#part-224-29v) |
| **NIOSH 9201** / Chlorinated & organonitrogen herbicides (patch) by GC-ECD / [Method document (opens in a new tab)](https://www.cdc.gov/niosh/docs/2003-154/pdfs/9201.pdf) | Dermal | Dermal PUF Patch |  |  |
| **ASTM D4861-23** / Pesticides and Polychlorinated Biphenyls in Air / [Method document (opens in a new tab)](https://www.astm.org/d4861-23.html) | Active (pump) | Low Volume PUF Tube |  | [226-92](https://analyt-mtc.com/catalog/product/skc-polyurethane-foam-puf-tubes/#part-226-92) |

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/)