BS 15796:2010 pdf download – Chemicals used for treatment of swimming pool water — Calcium hypochlorite
This European Standard is applicable to calcium hypochlorite used directly, or for the production of formulations, for treatment of water for swimming pools. It describes the characteristics of calcium hypochlorite and specifies the requirements and the corresponding test methods for calcium hypochlorite. It gives information on its use in swimming pool water treatment. It also determines the rules relating to safe handling and use of calcium hypochlorite (see Annex B).
2 Normative reference The following referenced document is indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 900, Chemicals used for treatment of water intended for human consumption ― Calcium hypochlorite 3 Description For the identification, the commercial form, the physical properties and the chemical properties see the relevant subclauses of EN 900.
4 Purity criteria
4.1 General This European Standard specifies the minimum purity requirements for calcium hypochlorite used for the treatment of water for swimming pools. Limits are given for impurities commonly present in the product. Depending on the raw material and the manufacturing process other impurities may be present and, if so, this shall be notified to the user and when necessary to relevant authorities. NOTE Users of the product should check national regulations in order to clarify whether it is of appropriate purity for treatment of water for swimming pools, taking into account water quality, required dosage, and contents of other impurities and additives used in the product not stated in the product standard. Limits have been given for impurities and chemical parameters where these are likely to be present in significant quantities from the current production process and raw materials. If the production process or raw materials lead to significant quantities of other impurities, by-products or additives being present, this shall be notified to the user.
4.2 Composition of commercial product Calcium hypochlorite is available in powder, granular or tablet form with a minimum concentration of mass fraction 65,5 % calcium hypochlorite (Ca(ClO) 2 ) (equivalent to an available active chlorine content in mass fraction of at least 65 %) at the time of delivery by the producer. The concentration of calcium hypochlorite shall be equal to or greater than the value specified by the manufacturer. Dissolution quality, calculated as available chlorine which is obtainable within 1 min after dissolution in water, shall not be less than a mass fraction of 45,5 %.
4.3 Impurities and main by-products The content of impurities and water-insoluble matter shall conform to the requirements specified in EN 900.
4.4 Chemical parameters
The contents of arsenic, cadmium, chromium, mercury, nickel, lead, antimony, selenium and bromate for each type of product shall conform to the requirements specified in EN 900.
5 Test methods
The methods for sampling and analysis are those specified in EN 900.
6 Labelling – Transportation – Storage
6.1 Means of delivery
Calcium hypochlorite shall be delivered in plastics-coated steel drums or polyethylene bottles.
In order that the purity of the product is not affected, the means of delivery shall not have been used previously for any different product or it shall have been specially cleaned and prepared before use.
6.2 Risk and safety labelling according to the EU Directives 1)
The following labelling requirements shall apply to calcium hypochlorite dry at the date of the publication of this standard.
a) Symbols and indications of danger:
1) O: Oxidizing;
2) C: Corrosive;
3) N: Dangerous for the environment;
b) Nature of special risks attributed to dangerous substances:
1) R 8: Contact with combustible material may cause fire;
2) R22: Harmful if swallowed;
3) R 31: Contact with acids liberates toxic gas;
4) R 34: Causes burns;
5) R 50: Very toxic to aquatic organisms;
c) Safety advice concerning dangerous substances:
1) S1/2: Keep locked up and out of the reach of children;
2) S 26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice;
3) S 36/37/39: Wear suitable protective clothing, gloves and eye/face protection;