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| Description | |||
| Slightly yellow, transparent liquid. | |||
| Uses | |||
| Sodium Bisulphite Solution is a convenient source of sulphur dioxide often used as an alternative to the powder (crystalline Sodium Sulphite / Sodium Metabisulphite). It is used as a reducing agent in a variety of applications, for example: | |||
| in effluent treatment particularly that containing chromium | |||
| as an antichlor in the textile and other industries | |||
| as an oxygen scavenger in boiler water treatment and in oil exploration/extraction | |||
| as a chemical substance in the manufacture of some dyestuffs, e.g. indigo and in the manufacture of pharmaceutical | |||
| intermediates. | |||
| Physico-chemical properties | |||
| Chemical formula | NaHSO3 | ||
| Mol Wt. | 104.07 g/mol | ||
| Density in temp.20C | 1.3-1.4 g/cm3 | ||
| Sodium Bisulphite decomposes with liberation of sulphur dioxide. | |||
| Technical Specification | |||
| NaHSO3 | min. 36% | ||
| Sodium sulphite (Na2SO3) | max. 2% | ||
| Sodium sulphate (Na2SO4) | max. 2,5% | ||
| Iron (Fe) | max. 10 mg/kg | ||
| Heavy metals (as Pb) | max. 10 mg/kg | ||
| Arsenic (As) | max. 0,5 mg/kg | ||
| Lead (Pb) | max. 0,5 mg/kg | ||
| Selenium (Se) | max. 1 mg/kg | ||
| Cadmium (Cd) | max. 0,1 mg/kg | ||
| Mercury (Hg) | max. 0,03 mg/kg | ||
| Zinc (Zn) | max 1 mg/kg | ||
| pH | min. 4 | ||
| Analysis made by ZN-„POLCHEM” Sp. z o.o.-001:2002 | |||
| HEALTH & SAFETY INFORMATION | |||
| Storage | |||
| It should be stored in acid resistant steel cisterns or in carbon steel cisterns with rubber lining or in polyethylene containers. | |||
| Transportation | |||
| Sodium bisulphite is supplied in rail cisterns or tank trucks. | |||
| RID classification – Class 8/17 c; ADR classification – Class 8/17 c. | |||
| Handling Precautions | |||
| Wear eye protection and rubber gloves, particularly when handling bulk quantities. Do not store near to, or allow to come into contact with acids or oxidizing agents. | |||
| Hazards | |||
| Sodium bisulphite solution is middly corrosive. It is not toxic substance and non-flammable but will decompose in a fire with liberation of sulphur dioxide, a toxic gas. | |||
| Toxicity | |||
| Decomposition of sodium bisulphite solution gives sulphur dioxide. The maximum limit value for SO2 is 2 mg/m3. The odour sensibility threshold is about 0.8 mg/m3. | |||
| It is irritation to eyes, nose, skin and respiratory tract. During inhalation causes: mucous membrane irritation, coughing, sultrines. After consumption causes: burning feeling in oesophagus and mouth. | |||
| First Aid – in case of poisoning SO2 | |||
| Eyes: Wash out with water for at least 15 minutes. | |||
| Mouth: Wash out with water and give water or milk to drink. | |||
| Skin: Wash off with planty of water. | |||
| Inhalation: Remove the person out of the danger area to fresh air, rest and keep warm until symptoms of distress subside. | |||
| Obtain medical assistance, particularly if coughing persists. | |||
| Spillage | |||
| In case of effluent: retard spillage with sand, soil. Dilute with water, slurry with soda ash or lime. | |||
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