Sodium Formaldehyde Bisulfite Cas 870-72-4 Industrial Grade And Medicine Grade
Rongalite is also called sodium bisulfate formaldehyde. Translucent white rhombic crystals or small pieces. The apparent density of 1.80 ~ 1.85 g/cm3. Melting point 64 ℃ (dissolve in the water of crystallization). Higher than 120 ℃. Soluble in water, slightly soluble in alcohol. Anhydrous salt is more stable. But in the moist air will gradually decompose. Has the strong reducibility under high temperature. Match ChengLiao pulp by zinc powder and water, ventilation with sulfur dioxide reaction, generate two zinc sulfate, add formaldehyde addition, zinc powder reduction react with sodium hydroxide to produce again. Used for dyeing and printing of discharging agent and reducing agent and can be used for synthetic rubber, sugar, the production of indigo dye and VAT dye.
| Item | Index |
| Industral Grade | Pharma Grade |
| NaHSO3 % ≥ | 99.0 | 99.0 |
| SO2 | 58.5-65 | 58.5-65 |
| Water insoluble matter % ≤ | 0.05 | 0.05 |
| Arsenic (as As) % ≤ | 0.0002 | 0.0002 |
| Iron (as Fe) % ≤ | 0.003 | 0.003 |
| Clarity % ≤ | Qualified |
| Heavy metal (Pb) % ≤ | 0.002 | 0.001 |
[Molecular Structure] 
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| Application |
| 1 | bleaching of cotton fabrics |
| 2 | paper making |
| 3 | tanning |
| 4 | chemical synthesis |
| 5 | production of pharmaceutical intermediates |
| 6 | Electroplating intermediate |
Physical Property & Specification
Sodium formaldehyde bisulfite Chemical Properties
| Melting point | 200 °C (dec.)(lit.) |
| Fp | 184 °C |
| storage temp. | -20°C |
| form | Powder |
| color | White to almost white |
| Water Solubility | 800 g/L (20 ºC) |
| Sensitive | Hygroscopic |
| Merck | 14,4236 |
| CAS DataBase Reference | 870-72-4(CAS DataBase Reference) |
| EPA Substance Registry System | Methanesulfonic acid, hydroxy-, monosodium salt(870-72-4) |
Applications
Sodium Bisulfite is used in the bleaching of cotton textiles; as reducing agent in dyes, paper-making, leather, chemical synthesis; in the manufacture of pharmaceutical intermediates, photographic developer, food bleacher, antiseptic and anti-oxidants.
Handling
Employees should utilize normal precautions when handling chemical products. The use of a face shield or chemical goggles, chemical gloves and apron are recommended when handling this product. In case of eye contact, flush with clean fresh water for 15 minutes and seek medical advice. In case of skin contact, remove contaminated clothing and launder before reuse, wash the effected area with soap & water. Review the Material Safety Data Sheet (MSDS) for this product prior to use.
Storage
Sodium Bisulfite should be stored in cool and dry place, avoid moisture and heat. No breakage, No mixed with oxidant and toxic matter. The storage period is 6 month since the production date. It should be transported by clean car, with covering matter, avoid raining.
Delivery
Delivery:Transit could be DHL,UPS,TNT,EMS,Fedex,and so on.
For mass orders, it will be delivered by air or sea.
Depending on your location, please allow 1-5 business days for your order to arrive.
For small order, please expect 3-7 days by UPS DHL EMS.
For mass order, please allow 5-8 days by Air, 15-30 days by Sea.
Payment Terms
100% TT Before Shipment
Package: The product is packed in 1200kg/IBC, or 250kg/drum
Storage: Store in room, dry and well-ventilated without direct sunshine, store temperature 5-30 °C.
Shelf life: 12 months.
