--- title: "Iron oxide (1309-37-1): exposure limits and sampling" url: https://analyt-mtc.com/tools/hazard-search/iron-oxide-1309-37-1/ lang: en alternates: en: https://analyt-mtc.com/tools/hazard-search/iron-oxide-1309-37-1/ de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/iron-oxide-1309-37-1/ --- Hazard search # Iron oxide CAS number 1309-37-1 Also known as Ferric oxide · Iron oxide (Elements by ICP HNO3 Digestion) · Iron oxide (fume) (as Fe) · Iron oxide fume · Iron oxide red · Iron(III) oxide · Red iron oxide · Rouge (inhalable) · Rouge (particulates, respirable) · Rouge (particulates, total) · Rouge (respirable) · Rouge (total inhalable) · Rouge (total respirable) ## UK workplace exposure limits | Limit | Value | Applies to | | --- | --- | --- | | 8-hour TWA | 5 mg/m³ | Iron oxide | | 15-minute STEL | 10 mg/m³ | Iron oxide | | 8-hour TWA | 10 mg/m³ | Rouge (inhalable) | | 8-hour TWA | 4 mg/m³ | Rouge (respirable) | ## Sampling methods | Method | Sampling | Medium | Analysis | Part numbers | | --- | --- | --- | --- | --- | | **MDHS 14/4** / General inhalable or respirable dusts by gravimetric analysis (respirable) / [Method document (opens in a new tab)](http://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs14-4.pdf) | Active (pump) | IOM & foam (or cyclone) with GF filter | GR | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) / [225-772](https://analyt-mtc.com/catalog/product/iom-sampler/#part-225-772) / [225-69](https://analyt-mtc.com/catalog/product/plastic-cyclone/#part-225-69) / [225-58F](https://analyt-mtc.com/catalog/product/glass-fibre-depth-filters/#part-225-58f) | | **MDHS 14/4** / General inhalable or respirable dusts by gravimetric analysis (inhalable) / [Method document (opens in a new tab)](http://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs14-4.pdf) | Active (pump) | IOM with glass fibre filter | GR | [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) | | **MDHS 91/2** / Metals & metalloids by XRF / [Method document (opens in a new tab)](http://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs91-2.pdf) | Active (pump) | IOM with 0.8µm MCE filter | XRF | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) / [225-19](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-19) / [225-1930](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-1930) | | **NIOSH 0500** / Particulates Not Otherwise Regulated, Total GR / [Method document (opens in a new tab)](https://www.cdc.gov/niosh/docs/2003-154/pdfs/0500.pdf) | Active (pump) | Filter Cassette | GR | [225-5-37-P](https://analyt-mtc.com/catalog/product/gla-5000-pvc-membrane-filters/#part-225-5-37-p) / [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) | | **NIOSH 0600** / Particulates Not Otherwise Regulated, Respirable GR / [Method document (opens in a new tab)](https://www.cdc.gov/niosh/docs/2003-154/pdfs/0600.pdf) | Active (pump) | Filter Cassette | GR | [225-01-02](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-01-02) / [225-5-37-P](https://analyt-mtc.com/catalog/product/gla-5000-pvc-membrane-filters/#part-225-5-37-p) / [225-3LF](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-3lf) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) / [225-8208A](https://analyt-mtc.com/catalog/product/gla-5000-pvc-membrane-filters/#part-225-8208) / [225-3851-PW](https://analyt-mtc.com/catalog/product/disposable-parallel-particle-impactors/#part-225-3851-pw) | | **NIOSH 7303** / Elements by ICP (Hot block/HCl/HNO3 Digestion) / [Method document (opens in a new tab)](http://www.cdc.gov/niosh/docs/2003-154/pdfs/7303.pdf) | Active (pump) | 0.8µm MCE filter in cassette | ICP-AES | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) | | **OSHA ID 121** | Active (pump) | | AA or AES | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) | | **OSHA ID 125G** | Active (pump) | | ICP-AES | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-3100](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3100) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) | | **OSHA ID-121** / Metal & metalloid particulates by AAS / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/osha-id121.pdf) | Active (pump) | 0.8µm MCE filter in cassette | | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) | | **OSHA ID-125G** / Metals & metalloid particulates by ICP / [Method document (opens in a new tab)](https://www.osha.gov/sites/default/files/methods/id125g.pdf) | Active (pump) | 0.8µm MCE filter in cassette | | [225-3-01](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3-01) / [225-3100](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3100) / [225-1](https://analyt-mtc.com/catalog/product/aluminium-respirable-dust-cyclone/#part-225-1) | | **ISO 10882-1: 2011** / Welding fumes by gravimetric or chemical analysis / [Method document (opens in a new tab)](https://shop.bsigroup.com/ProductDetail/?pid=000000000030144532) | Active (pump) | Headset & minisampler with 13mm MCE filter | | [225-6200](https://analyt-mtc.com/catalog/product/face-level-sampling/#part-225-6200) / [225-6201](https://analyt-mtc.com/catalog/product/face-level-sampling/#part-225-6201) / [225-6202](https://analyt-mtc.com/catalog/product/biostage/#part-225-6202) / [225-8050](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-8050) | 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/)