---
title: "Dibutyl phosphate (107-66-4): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/dibutyl-phosphate-107-66-4/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/dibutyl-phosphate-107-66-4/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/dibutyl-phosphate-107-66-4/
---

Hazard search

# Dibutyl phosphate

CAS number

107-66-4

Also known as

Dibutyl acid o-phosphate · Dibutyl hydrogen phosphate · Phosphoric acid dibutyl ester

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 1 ppm |  |
| 8-hour TWA | 8.7 mg/m³ |  |
| 15-minute STEL | 2 ppm |  |
| 15-minute STEL | 17 mg/m³ |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **NIOSH 5017** / GC-FPD / [Method document (opens in a new tab)](https://www.cdc.gov/niosh/docs/2003-154/pdfs/5017.pdf) | Active (pump) | Filter Cassette | GC-FPD | [225-17-01](https://analyt-mtc.com/catalog/product/ptfe-polytetrafluoroethylene-filters/#part-225-17-01) / [225-2LF](https://analyt-mtc.com/catalog/product/sureseal-cassette-blanks/#part-225-2lf) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |

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/)