---
title: "Diphenylamine (122-39-4): exposure limits and sampling"
url: https://analyt-mtc.com/tools/hazard-search/diphenylamine-122-39-4/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/diphenylamine-122-39-4/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/diphenylamine-122-39-4/
---

Hazard search

# Diphenylamine

CAS number

122-39-4

Also known as

N-phenylaniline · N-Phenylbenzamine

## 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 |
| --- | --- | --- | --- | --- |
| **OSHA 78** / Diphenylamine & Isopropylaniline by HPLC/UV / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-78.pdf) | Active (pump) | Coated glass fibre filters in cassette | HPLC-UV | [225-9004](https://analyt-mtc.com/catalog/product/skc-coated-treated-filters/#part-225-9004) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) |
| **Other** | Passive |  | HPLC-UV |  |

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/)