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 |
| 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. |
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 |
| 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 |
| Toxicity | LD50 i.v. in mice: 175 mg/kg, Hoppe, Goble, J. Pharmacol. Exp. Ther. 101, 101 (1951) |
