USD $1.00-1.00 / Kilogram
USD $1.00-1.00 / Kilogram
USD $1.00-1.00 / Kilogram
USD $1.00-1.00 / Kilogram
USD $1.00-1.00 / Kilogram
USD $5.00-20.00 / Kilogram
USD $100.00-150.00 / Kilogram
USD $100.00-150.00 / Kilogram
USD $9.00-99.00 / Kilogram
product name: sodium metabisulfite / sodium metabisulphite
molecular weight: 190.10
specification: 25kg woven bag
quality guarantee period: 6 months
basic information
product name: |
sodium sulfite |
synonyms: |
sodium sulfite anhydrous;sodium sulfite, exsiccated;sodium sulphite;anhydroussodiumsulfite;disodiumsulfite;exsiccatedsodiumsulfite;natriisulphis;natriumsulfid |
cas: |
7757-83-7 |
mf: |
na2o3s |
mw: |
126.04 |
product categories: |
inorganic chemicals;inorganics;water ttreatment chemicals;analytical reagents for general use;disulfide bridge cleavage reagents;denaturation;synthetic reagents;acs gradebiochemicals and reagents;synthetic reagents;inorganic compound;paper, glass, printing and dyeing |
mol file: |
7757-83-7.mol |
|
chemical properties |
melting point |
500 °c |
density |
2.63 |
refractive index |
1,484 |
storage temp. |
store at rt. |
solubility |
h2o: 1 m at 20 °c, clear, colorless |
water solubility |
23 g/100 ml (20 ºc) |
sensitive |
hygroscopic |
stability |
stable. incompatible with strong acids. moisture and air sensitive. |
technical specification
specification index name |
analytically pure-ar |
chemical pure-cp |
high purity |
content(na2so3) |
≥97.0 |
≥95.0 |
≥96.0 |
clarity test |
qualified |
qualified |
|
water insoluble |
≤0.005 |
≤0.01 |
≤0.03 |
sulphurous acid( counted by na2hso3 ) |
qualified |
qualified |
|
free alkali( counted by na2co3 ) |
≤0.1 |
≤0.3 |
≤0.5 |
chloride(cl) |
≤0.005 |
≤0.02 |
≤0.05 |
thiosulfuric acid(s2o3) |
≤0.01 |
≤0.02 |
≤0.04 |
ferrum(fe) |
≤0.0005 |
≤0.002 |
≤0.003 |
heavy metal(counted by pb) |
≤0.001 |
≤0.002 |
≤0.003 |
arsenic(as) |
≤0.0001 |
≤0.0005 |
≤0.001
|