Sodium sulfite CAS NO.7757-83-7

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.

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