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| Product name:Sodium metabisulfite CAS：7681-57-4 MF：H2O5S2.2Na MW：192.12 EINECS:231-673-0 | |||||||||
7681-57-4
bosschem
7681-57-4
Product Description
Product name:Sodium metabisulfite
CAS：7681-57-4
MF：H2O5S2.2Na
MW：192.12
EINECS:231-673-0
Specifications :
| Sodium metabisulfite Basic information | |
| Product Name: | Sodium metabisulfite |
| CAS: | 7681-57-4 |
| MF: | 2Na.O5S2 |
| MW: | 190.11 |
| EINECS: | 231-673-0 |
| Mol File: | 7681-57-4.mol |
| Sodium metabisulfite Chemical Properties | |
| Melting point | >300 °C (lit.) |
| density | 1.48 |
| storage temp. | Store at +5°C to +30°C. |
| solubility | 540 g/L (20°C) |
| form | Powder/Solid |
| Specific Gravity | 1.48 |
| color | White to slightly yellow |
| PH | 3.5-5 (50g/l, H2O, 20℃) |
| Odor | Sulphorous |
| PH Range | 4.5 at 50 g/l at 20 °C |
| Water Solubility | 540 g/L (20 ºC) |
| Sensitive | Air & Moisture Sensitive |
| Merck | 148,638 |
| Exposure limits | ACGIH: TWA 5 mg/m3 |
| NIOSH: TWA 5 mg/m3 | |
| Stability: | Stable. Incompatible with strong oxidizing agents, strong acids. Contact with strong acids releases a poisonous gas. May be moisture and air sensitive. |
| InChIKey | HRZFUMHJMZEROT-UHFFFAOYSA-L |
| CAS DataBase Reference | 7681-57-4(CAS DataBase Reference) |
| EPA Substance Registry System | Sodium metabisulfite (7681-57-4) |
ITEM | SPECIFICATION | TEST RESULT |
PURITY(AS Na2S2O5 ): | 97.0%MIN | 97.26% |
SULFUR DIOXIDE(SO2): | 65.0%MIN | 65.53% |
HEAVY METALS(As Pb): | 0.0005%MAX | 0.00015% |
WATER INSOLUBLE: |
0.05%MAX |
0.02% |
IRON(Fe): | 0.003%MAX | 0.0013% |
PH VALUE: | 4.0-4.8 | 4.4 |
