Customization: | Available |
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CAS No.: | 7757-83-7 |
Formula: | Na2so3 |
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ITEM | SPECIFICATION | TEST RESULT |
Na2SO3 content : | 96.0 %min | 96.58% |
Sodium sulphate : | 2.5%max | 1.30% |
Sodium chloride (NaCL): | 0.1%max | 0.08% |
Iron (Fe) : | 30ppm max | 15ppm |
Water insoluble : | 0.02%max | 0.02% |
HEAVY METAL AS PB | 10ppm max | 5ppm |
Free alkali (as Na2CO3) : | 0.10%max | 0.08% |
Arsenic: | 2ppm max | 1.5ppm |
Sodium sulphite is a versatile chemical compound with various industrial applications. It serves as a reducing agent, bleaching agent, and preservative in industries such as photography, water purification, food, and textile printing. In photography, it reacts with silver salts to develop images on film. Its reducing properties make it effective in killing bacteria and viruses, making it ideal for water purification and disinfecting medical tools. In the food industry, sodium sulfite acts as a bleaching agent, preservative, loosening agent, and antioxidant, enhancing food shelf life and quality. Additionally, it is utilized in the textile industry as a bleaching agent and vat residual dye.
Storage conditions: Sodium sulphite should be stored in a cool, ventilated warehouse, away from fire and heat sources, and direct sunlight. It should be kept separate from oxidants, acids, and alkalis to prevent dangerous mixing.
Operational safety: Operators must undergo special training and strictly follow operating procedures. Protective equipment like self-priming filter dust masks, chemical safety glasses, rubber acid and alkali resistant clothing, and gloves should be worn to prevent contact with harmful substances.
Precautions for use: Sodium sulfite is easily decomposed, so it is best to prepare it for immediate use. In the food industry, its solution should be prepared and used immediately to maintain effectiveness. Avoid direct contact with substances containing metal ions to prevent chelation reactions.
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