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Sodium Sulfite Anhydrous Purity from 90%-97% min.
Appearance: white crystalline powder .
Molecular formula : Na2SO3
Packing : double-layer plastic woven bag.
Melting Point:500 ºC Uses : used in medicine, papermaking, tannage, leather, printing, dyeing, bleaching and food .
Quality standard : Q/320124JM02-2003
SODIUM SULPHITE ANHYDROUS | ||||
Super grade | First grade | Salable product | Industrial grade | |
Sodium sulfite ( Na2SO3 ) , % ≥ | 97.0 | 96.0 | 93.0 | 90.0 |
Fe , ?≤ | 0.003 | 0.005 | 0.01 | / |
Water insoluble matter , % ≤ | 0.02 | 0.03 | 0.05 | / |
Free alkali ( as Na2SO3 ) , % ≤ | 0.10 | 0.40 | 0.60 | / |
Na2SO4 , % ≤ | 2.50 | / | / | / |
NaCl , % ≤ | 0.10 | / | / | / |
Package Storage and transportation:
1. Plastic film-lined PP woven bag, Net weight per bag: 25Kg or 50Kg.
2. Not allowed in a room with any oxidant or strong acid, and keep away from an oxidation by air or humidity.
3. Keep away from sunlight and humidity during its transportation.
4. Storage life: No more than half year from ex-factory date.
Sodium Sulphite anhydrous 90-97%