BS/EN 15362-2014 pdf download.Chemicals used for treatment of swimming pool water Sodium carbonate.
2 Normative references
The following documents. in whole or in part, are normatively referenced in this document and care indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 897, Chemicals used for treatment of wafer intended for human consumption – Sodium carbonate
3 Description
3.1 Identification
3.1.1 Chemical name
Sodium carbonate.
3.1.2 Synonym or common name
Soda ash, anhydrous sodium carbonate, light soda ash, heavy soda ash.
3.1.3 Relative molecular mass
105,99.
3.1.4 Empirical formula
Na2CO3
3.1.5 Chemical formula Na2CO3
3.1.6 CAS Registry Numberl)
497-19-8.
3.2 CommercIal forms
The product is available as dry powder or fine granules and is described as light soda or heavy soda according to
bulk density (see 3.3.2).
3.3 Physical properties
3.3.1 Appearance
The product is a white powder or crystals, slightly hygroscopic.
3.3.2 Density
The density of this product is 2,53 9/cm3.
The bulk density is:
— ranging from 0,5 kgldm3 to 0,65 kg/dm3 (light soda ash);
— ranging from 0,8 kg/dm3 to 1,2 kgldm3 (heavy soda ash).
3.3.3 Solubility in water
The product is soluble at 212 gIl at 20 °C.
3.3.4 Vapour pressure
Not applicable.
3.3.5 Boiling point at 100 kPa)
Not applicable.
3.3.6 Melting point
851 C.
3.3.7 Specific heat
1,043 J/(kg. K).
3.3.10 Critical pressure
Not applicable.
3.3.11 PhysIcal hardness
The hardness of solid sodium carbonate is given as 1 to 2 on the Mohs scale of hardness.
3.4 Chemical properties
Sodium carbonate reacts exothermically with acids with the formation of carbon dioxide, Sodium carbonate is slightly hygroscopic and dissolution in water is an exothermic reaction.
4 Purity criteria
4.1 General
This European Standard specifies the minimum purity requirements for sodium carbonate used for the treatment of swimming pool water. 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.
Users of this product should check the national regulations in order to clarify whether it is of appropriate purity for treatment of swimming pool water, taking into account raw water quality, required dosage, contents of other impunties and additives used in the products not stated in this 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 leads to significant quantities of impurities, by-products or additives being present, this shall be notified to the user.
4.2 Composition of commercial product
The product shall contain not less than a mass fraction of 99 % of Na2CO3.
4.3 Impurities and main by-products
The product shall conform to the requirements specified in Table 1.
The concentration limits refer to pure Na2CO3.
5 Test methods
The methods for sampling and analysis are those specified In EN 897.
6 Labelling — Transportation — Storage
6.1 Means of delivery
Sodium carbonate can be delivered in bulk, bulk bags or in bags.
To ensure that the purity of the products is not affected, the means of delivery shall not have been previously used
for any different product or it shall have been specially cleaned and prepared before use.
6.2 Labelling according to the EU legislation4)
The following labelling requirements apply to sodium carbonate at the date of the publication of this document.
The legislation 121, and its amendments for the purposes of its adaptation to technical and scientific progress, contains a list of substances classified by the EU.
Substances not listed in this regulation should be classified on the basis of their intrinsic properties according to the criteria in the regulation by the person responsible for the marketing of the substance.
6.3 Transportation regulations and labelling
Sodium carbonate is not listed under a UN Numbers). Sodium carbonate is not classified as a dangerous product for road, rail, sea and air transportation.
6.4 Marking
The marking shall include the following:
— the name “sodium carbonate” and trade name;
— the net mass;
— the name and address of supplier and/or manufacturer;
— the statement “This product conforms to EN 15362.
6.5 Storage
6.5.1 General
For more details about use, see Annex A.
6.5.2 Long term stability
Sodium carbonate is stable in dry conditions.
6.5.3 Storage Incompatibilities
Keep bags tightly closed and dry. Keep away from acids.BS/EN 15362-2014 pdf download.