---
title: "2,2-Dichloro-4,4'-methylene dianiline (101-14-4)"
url: https://analyt-mtc.com/tools/hazard-search/2-2-dichloro-4-4-methylene-dianiline-101-14-4/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/2-2-dichloro-4-4-methylene-dianiline-101-14-4/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/2-2-dichloro-4-4-methylene-dianiline-101-14-4/
---

Hazard search

# 2,2-Dichloro-4,4'-methylene dianiline

CAS number

101-14-4

Also known as

2,2'-Dichloro-4,4'-methylene dianiline (MbOCA) · 4,4'-Methylene bis(2-chloroaniline) · 4,4'-Methylenebis(2-chloroaniline) (MOCA) · 4,4'-Methylenebis\[o-chloroaniline\] · 4,4-Methylenebis(orthochloroaniline) (MbOCA) · MBOCA · MOCA

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 0.005 mg/m³ |  |

### Notations

-   BMGV: a biological monitoring guidance value exists
-   Carc: carcinogen
-   Sk: can be absorbed through the skin

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **MDHS 75/2** | Active (pump) |  | GC-ECD | [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) |
| **MDHS 75/2** / Aromatic amines by HPLC / [Method document (opens in a new tab)](https://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs75-2.pdf) | Active (pump) | IOM with glass fibre filter (requires coating) | HPLC | [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) / [225-9004](https://analyt-mtc.com/catalog/product/skc-coated-treated-filters/#part-225-9004) |
| **OSHA 71** / o-Dianisidine, 4.4-Methylenebis(2-chloroaniline), and o-Tolidine by GC-ECD / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-71.pdf) | Active (pump) | Two coated glass fibre filters preloaded in 37mm cassette | GC-ECD | [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) |

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/)