Grade: Technical Grade
Chemical Formula: Na₂SO₃
Molecular Weight: 126.04
CAS No.: 7757-83-7
Appearance: White crystalline powder or hexagonal crystals
Odor: Odorless
Solubility: Soluble in water / Slightly soluble in alcohol / Insoluble in ether
Water Solubility:12.54 g/100 ml (0°C)，28% max solubility at ，33.4°C283 g/100 ml (80°C)
pH Value: Alkaline in aqueous solution

Grade: Food Grade
Chemical Formula: Na₂SO₃
Molecular Weight: 126.04
CAS No.: 7757-83-7
Appearance: White crystalline powder or hexagonal crystals
Odor: Odorless
Solubility: Easily soluble in water, slightly soluble in ethanol, insoluble in ether
Water Solubility: 12.54 g/100 ml (0°C), 283 g/100 ml (80°C), max solubility ~28% at 33.4°C
pH Value: Alkaline aqueous solution
Stability: Easily oxidized to sodium sulfate in air, decomposes at high temperature

Product Name: Manganese Carbonate
Grade: High Purity & Phosphating Grade
Chemical Formula: MnCO₃
Molecular Weight: 114.95
CAS No.: 598-62-9
Appearance: Rose-colored diamond-shaped crystals or amorphous light brown powder
Relative Density: 3.125
Solubility: Insoluble in water, soluble in dilute inorganic acids
Stability: Stable in dry air, prone to oxidation when wet forming manganese trioxide, decomposes on heating releasing CO₂

Grade: Food Grade
Chemical Formula: NaHSO₃
Molecular Weight: 104.06
CAS No.: 7631-90-5
Appearance: White crystalline powder with odor of sulfur dioxide
Stability: Oxidizes to sulfate when exposed to air
Water-Insoluble: ≤ 0.01%
SO₂ Content: 58.5–67.4% (Result: 65%)
Iron (Fe): ≤ 50 mg/kg (Result: 42.2 mg/kg)
Arsenic (As): ≤ 2 mg/kg (Result: <2 mg/kg)
Lead (Pb): ≤ 2 mg/kg (Result: <0.005 mg/kg)
Heavy Metals (Pb): ≤ 5 mg/kg (Result: <5 mg/kg)
Selenium (Se): ≤ 5 mg/kg (Result: 0.1 mg/kg)