---
title: "Calcium oxide - inhalable fraction (1305-78-8) — Analyt-MTC"
url: https://analyt-mtc.com/tools/hazard-search/calcium-oxide-inhalable-fraction-1305-78-8/
lang: en
alternates:
  en: https://analyt-mtc.com/tools/hazard-search/calcium-oxide-inhalable-fraction-1305-78-8/
  de: https://analyt-mtc.com/de/tools/gefahrstoffsuche/calcium-oxide-inhalable-fraction-1305-78-8/
---

Hazard search

# Calcium oxide - inhalable fraction

CAS number

1305-78-8

Also known as

Calcium oxide · Calcium oxide (calcium) · Calcium oxide (Elements by ICP HNO3 Digestion) · Calcium oxide - respirable fraction · Lime · Quicklime

## UK workplace exposure limits

| Limit | Value | Applies to |
| --- | --- | --- |
| 8-hour TWA | 2 mg/m³ | Calcium oxide - inhalable fraction |
| 8-hour TWA | 1 mg/m³ | Calcium oxide - respirable fraction |
| 15-minute STEL | 4 mg/m³ | Calcium oxide - respirable fraction |

## Sampling methods

| Method | Sampling | Medium | Analysis | Part numbers |
| --- | --- | --- | --- | --- |
| **MDHS 14/4** / General inhalable or respirable dusts by gravimetric analysis (total inhalable) / [Method document (opens in a new tab)](http://www.hse.gov.uk/pubns/mdhs/pdfs/mdhs14-4.pdf) | Active (pump) | IOM sampler |  | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) |
| **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 sampler & foam, or cyclone |  | [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) |
| **NIOSH 7020** / CALCIUM and compounds, as Ca by AA-F / [Method document (opens in a new tab)](https://www.cdc.gov/NIOSH/DOCS/2003-154/pdfs/7020.pdf) | Active (pump) | Filter Cassette | AA-F | [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) / [225-3100](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-3100) |
| **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 37mm 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-121** / Metal & metalloid particulates in Workplace Atmospheres by AA/AES / [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) |
| **BS ISO 15202-1: 2020** / Determination of metals and metalloids in airborne particulate matter by ICP | Active (pump) | IOM with 0.8µm MCE filter |  | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) / [225-1930](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-1930) |
| **BS ISO 15202-1: 2020** / Determination of metals and metalloids in airborne particulate matter by ICP | Active (pump) | IOM with 0.8µm MCE filter and foam |  | [225-70A](https://analyt-mtc.com/catalog/product/haz-dust-7204-particulate-monitor/#part-225-70a) / [225-1930](https://analyt-mtc.com/catalog/product/mixed-cellulose-ester-membrane-filters/#part-225-1930) / [225-772](https://analyt-mtc.com/catalog/product/iom-sampler/#part-225-772) |

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/)