|Place of Origin:||China|
|Brand Name:||JH China|
Payment & Shipping Terms:
|Minimum Order Quantity:||20000KG|
|Packaging Details:||25KGS/PE Bag|
|Delivery Time:||15 work days|
|Name:||Sodium Metabisulfite||Chemical Formula:||Na2S2O5|
|Molecular Weight:||190.09||CAS Registry Number:||7681-57-4|
|Melting Point:||> 300 Degrees||Water Soluble:||Soluble|
Sodium Metabisulfite is White or Yellow Crystalline Powder or Small Crystals with a Strong SO2 Odor
|CAS Registry Number||7681-57-4|
Sodium metablisulfite; sodium bisulfite; heavy sulfur oxygen; Sodium metabisulfite; Sodium pyrosulfite molecular formula Na2S2O5
Molecular weight: 190.10
Appearance and properties: It is colorless prism crystal or white powder; it has sulfur dioxide taste, acid and salty; it will be yellow when stored for a long time.
Melting point (° C):> 300 (decomposition)
Relative density (water = 1): 1.48
Solubility: soluble in water, the aqueous solution is acidic (54g / 100ml water at 20 ℃; 81.7g / 100ml water at 100 ℃). Soluble in glycerol, slightly soluble in ethanol. The relative density is 1.4. Soluble in water, soluble in glycerol, slightly soluble in ethanol. Decompose easily when exposed to moisture, and easily oxidize to sodium sulfate when exposed to air. Contact with strong acid releases sulfur dioxide and generates corresponding salts. Decomposes when heated to 150 ° C.
Stability and reactivity
Incompatibility: Strong acid, strong oxidant.
Conditions to avoid: humid air.
S26In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
After accidental contact with eyes, rinse immediately with plenty of water and seek medical advice.
S39Wear eye / face protection.
Wear goggles or a mask.
S46If swallowed, seek medical advice immediately and show this container or label.
If swallowed, seek medical advice immediately and show the container or label.
R22Harmful if swallowed.
Harmful if swallowed.
R31Contact with acids liberates toxic gas.
Case of acid releases toxic gas.
R41Risk of serious damage to the eyes.
Serious damage to eyes.