A7317412
Sodium sulfite , AR,98.0% , 7757-83-7
Synonym(s):
E221
CAS NO.：7757-83-7
Empirical Formula: Na2O3S
Molecular Weight: 126.04
MDL number: MFCD00003503
EINECS: 231-821-4
| Pack Size | Price | Stock | Quantity |
| 500G | RMB33.60 | In Stock |
|
| 2.5KG | RMB126.40 | In Stock |
|
| 20×500g | RMB687.20 | In Stock |
|
| others | Enquire |
Update time: 2022-07-08
PRODUCT Properties
| Melting point: | 500 °C |
| bulk density | 1480kg/m3 |
| Density | 2.63 |
| refractive index | 1,484 |
| storage temp. | Store at +5°C to +30°C. |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| form | Solid |
| Specific Gravity | 2.633 |
| color | White to slightly yellow |
| PH | 9.0-10.5 (25℃, 1M in H2O) |
| Odor | Odorless |
| PH Range | 9.0 - 10.5 at 126 g/l at 25 °C |
| Water Solubility | 23 g/100 mL (20 ºC) |
| Sensitive | Hygroscopic |
| Merck | 14,8682 |
| Stability: | Stable. Incompatible with strong acids. Moisture and air sensitive. |
| CAS DataBase Reference | 7757-83-7(CAS DataBase Reference) |
| NIST Chemistry Reference | sodium sulfite(7757-83-7) |
| EPA Substance Registry System | Sodium sulfite (7757-83-7) |
| Absorption | cut-off at 265nm in H2O at 1M |
Description and Uses
These white crystals were prepared by passing sulfurous gas over moist sodium carbonate. Sodium sulfite is soluble in water but less so in alcohol. It was used as a preservative for alkaline developers and as a hypo clearing agent in photographic printing.
Safety
| Symbol(GHS) |  GHS07 |
| Signal word | Warning |
| Hazard statements | H315-H319-H335 |
| Precautionary statements | P233-P260-P261-P264-P271-P280-P302+P352-P304-P304+P340-P305+P351+P338-P312-P321-P332+P313-P337+P313-P340-P362-P403-P403+P233-P405-P501 |
| Hazard Codes | Xn |
| Risk Statements | 31-36/37/38-22-40-36/38 |
| Safety Statements | 24/25-36-26-22 |
| WGK Germany | 1 |
| RTECS | WE2150000 |
| F | 3-10 |
| TSCA | Yes |
| HS Code | 28321000 |
| Hazardous Substances Data | 7757-83-7(Hazardous Substances Data) |
| Toxicity | LD50 i.v. in mice: 175 mg/kg, Hoppe, Goble, J. Pharmacol. Exp. Ther. 101, 101 (1951) |
