---
title: "Chlorpyrifos (2921-88-2): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/chlorpyrifos-2921-88-2/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/chlorpyrifos-2921-88-2/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/chlorpyrifos-2921-88-2/
---

Hazard search

# Chlorpyrifos

CAS number

2921-88-2

Also known as

Chloropyrifos (ISO) · Chlorpyrifos (Dursban) · Chlorpyrifos (Organophosphorus Pesticides) · Chlorpyriphos · Dursban · Dursban (chlorpyrifos)(organophosphorus pesticides) · O,O-Diethyl O-(3,5,6-trichloro-2-pyridyl) phosphorothioate

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 0.2 mg/m³ |  |
| 15-minute STEL | 0.6 mg/m³ |  |

### Notations

-   Sk: can be absorbed through the skin

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **MDHS 94/2** / Pesticides in air by GC -MS / [Method document (opens in a new tab)](https://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs94-2.pdf) | Active (pump) | IOM and Tenax Tube (30/15 mg) | HPLC-UV | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) / [225-58F](https://analyt-mtc.com/catalog/product/glass-fibre-depth-filters/#part-225-58f) / [226-35](https://analyt-mtc.com/catalog/product/skc-tenax-sorbent-tubes/#part-226-35) |
| **NIOSH 5600** / Organophosphorus pesticides by GC-FPD / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/5600-F.pdf) | Active (pump) | OVS-2 tube with quartz filter | GC-FPD | [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) |
| **OSHA 62** / Chlorpyrifos, Dichlorvos, Diazinon, Malathion & Parathion by GC-FPD / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha62.pdf) | Active (pump) | OVS-2 tube with GF filter | GC-FPD | [226-30-16](https://analyt-mtc.com/catalog/product/skc-osha-versatile-sampler-ovs-tubes/#part-226-30-16) / [224-29V](https://analyt-mtc.com/catalog/product/skc-gas-and-vapour-sampling-accessories/#part-224-29v) |
| **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/)