Calcium hydroxide. Documentation
Journal Title: Podstawy i Metody Oceny Środowiska Pracy - Year 2013, Vol 29, Issue 3
Abstract
Calcium hydroxide (Ca(OH)[sub]2[/sub]), commonly known as slaked lime, is used to clean beet juice in the sugar industry, as a water softener, in fertilizer production and in flue gas desulphurisation in power. The term slaked lime (slaked lime) corresponds to an aqueous slurry of calcium hydroxide known as milk of lime. The aqueous slurry is used in chemical processes for painting and as a component of mortar. Hydrated lime, or dry powdered calcium hydroxide, is used to manufacture sodium carbonate by Solvay (Soda Ash), in deacidification of soils, disinfection, in bleach-ing households, farm buildings and tree trunks. Calcium hydroxide is an HPV substance. Calcium hydroxide is considered as a strong base, completely ionized in solution. Compared with the strong inorganic base, it has a similar effect, but 2.5-fold weaker. Mixtures of aqueous calcium hydroxide are strongly alkaline and its pH is, depending on the concentration, 12–13. Calcium hydroxide is corrosive after ingestion, especially in the esophagus and the stomach and causes redness, blisters and sores at the contact with the skin. Occupational exposure of workers to calcium hydroxide dusts takes place during the comminution of the substance, but also as a result of exposure to calcium oxide, which in humidity reacts with water to form calcium hydroxide. Particles of calcium hydroxide in humans are irritating to the eyes, upper respiratory tract and skin. In the available literature, there are no data about dose-response in humans and animals for calcium hydroxide. Given the similarities in the action of the oxide and calcium hydroxide, it was proposed to maintain the current value of TWA for inhalable fraction of calcium hydroxide 2 mg/m[sup]3[/sup] and adopt STEL of 6 mg/m[sup]3[/sup], and for respirable fraction of 1 mg/m3 for TWA and STEL of 4 mg/m[sup]3[/sup].
Authors and Affiliations
Małgorzata Kupczewska-Dobecka
Keywords
Related Articles
- EP ID EP224626
- DOI -
- Views 111
- Downloads 0
Fluorouracyl – frakcja wdychalna. Dokumentacja proponowanych dopuszczalnych wielkości narażenia zawodowego
Fluorouracyl jest lekiem cytostatycznym. Narażenie zawodowe na fluorouracyl występuje podczas jego wytwarzania, konfekcjonowania i pakowania oraz stosowania w codziennej praktyce leczniczej oddziałów szpitalnych. Maksyma...
Fenylohydrazyna i jej sole – w przeliczeniu na fenylohydrazynę. Dokumentacja proponowanych dopuszczalnych wielkości narażenia zawodowego
Fenylohydrazyna w temperaturze pokojowej jest bezbarwną lub żółtą oleistą cieczą, a w niższych temperaturach występuje w postaci krystalicznej. Fenylohydrazyna jest stosowana w syntezie organicznej jako silny środek redu...
Sól sodowa warfaryny Oznaczanie w powietrzu środowiska pracy metodą wysokosprawnej chromatografii cieczowej
Opracowano nową metodę oznaczania stężeń soli sodowej warfaryny (WAS) w powietrzu na stanowiskach pracy do przeprowadzania kontroli warunków sanitarnohigienicznych. Metoda polega na: zatrzymaniu soli sodowej warfaryny na...
Zinc dichloride. Determination in workplace air
Zinc dichloride is very soluble in water. It is used in galvanic processes, for wood impregnation, in the textile industry, in organic synthesis and for the production of explosives, for example smoke candles. Zinc dichl...
The activity of the Interdepartmental Commission forMaximum Admissible Concentrations and Intensities for Agents Harmful to Health in the Working Environment in 2014–2016
In the third part of the National Programme “Improvement of safety and working condi-tions”, the Commission met at 10 sessions, during which the following items were discussed:– 35 documentations for recommended exposure...