---
title: "Tetramethyldiaminobenzophenone (90-94-8): sampling methods"
url: https://analyt-mtc.com/tools/hazard-search/tetramethyldiaminobenzophenone-90-94-8/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/tetramethyldiaminobenzophenone-90-94-8/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/tetramethyldiaminobenzophenone-90-94-8/
---

Hazard search

# Tetramethyldiaminobenzophenone

CAS number

90-94-8

Also known as

Michler's ketone

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 50 ppm |  |
| 8-hour TWA | 308 mg/m³ |  |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **NIOSH 2554** / Glycol Ethers by GC-FID / [Method document (opens in a new tab)](https://www.cdc.gov/niosh/docs/2003-154/pdfs/2554.pdf) | Active (pump) | Sorbent Tube |  | [226-81A](https://analyt-mtc.com/catalog/product/skc-anasorb-sorbent-tubes/#part-226-81a) |
| **OSHA 101** / Dipropylene Glycol Methyl Ether by GC-FID / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-101.pdf) | Active (pump) | Sorbent Tube |  | [226-01](https://analyt-mtc.com/catalog/product/skc-anasorb-sorbent-tubes/) |

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)