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Molecule
ID:129071
Structure
Similarity
Functional Group
Text
General Information
Structure
Molecular Formula
K₂O₅S₂
Molecular Mass
222.3236
Exact Mass
221.84612846
Charge
0
InChI
InChI=1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
InChIKey
RWPGFSMJFRPDDP-UHFFFAOYSA-L
Canonic Smiles
[O-]S(=O)S(=O)(=O)[O-].[K+].[K+]
Isomeric Smiles
[K+].[K+].[O-]S(=O)S(=O)(=O)[O-]
Calculated Properties
JChem
Acid pKa
-2.7217357
H Acceptors
5
H Donor
0
LogD (pH = 5.5)
-6.1587806
LogD (pH = 7.4)
-6.185216
Log P
-1.5739199
Molar Refractivity
18.7261
Polarizability
9.72111
Polar Surface Area
97.33
Rotatable Bonds
1
Lipinski's Rule of Five
true
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Molecular Spectra
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Bioactivity
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General Information
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Data Source
Academic Data
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Potassium_metabisulfite
PubChem
28019
Commercial Catalog
Sigma Aldrich
60508
60509
P2522
12619
31268
Alfa Aesar
43908
Names and Identifiers
IUPAC Traditional name
dipotassium metabisulfite
Synonyms
Dipotassium disulfite
Potassium metabisulfite
Potassium pyrosulfite
偏硫代硫酸钾
焦亚硫酸钾
偏重亚硫酸钾
Potassium metabisulfite
Potassium disulfite
Potassium metabisulfite
Potassium disulfite
IUPAC name
dipotassium sulfinatosulfonate
Registration numbers
PubChem CID
28019
Wikipedia Title
Potassium_metabisulfite
Chemspider ID
26061
CAS Number
16731-55-8
Unique Ingredient Identifier
65OE787Q7W
EC Number
240-795-3
PubChem SID
24847706
24858904
24881901
24898332
162223371
MDL Number
MFCD00167605
Merck Index
147645
Molecule Details
Wikipedia
Potassium_metabisulfite
Sigma Aldrich
P2522
Packaging
500 g in poly bottle
References
PubChem Literature
No Data Available
Click here to submit data
Bioactivity
PubChem BioAssay
Registration numbers
•
PubChem CID
•
Wikipedia Title
•
Chemspider ID
•
CAS Number
•
Unique Ingredient Identifier
•
EC Number
•
PubChem SID
•
MDL Number
•
Merck Index
Properties
Safety Information
Main Hazard
Irritant, asthma risk
Source
EU Index
Not listed
Source
RTECS
TT4920000
Source
NFPA704
0
1
0
Source
Risk Statements
R36 37 38
Source
31
-
36/37/38
Source
GHS Hazard statements
H315
-
H319
-
H335
Source
German water hazard class
1
Source
GHS Pictograms
Acute toxicity (oral, dermal, inhalation), category 4
Skin irritation, category 2
Eye irritation, category 2
Skin sensitisation, category 1
Specific Target Organ Toxicity – Single exposure, category 3
Source
European Hazard Symbols
Irritant (Xi)
Source
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
Source
Safety Statements
26
-
36
Source
26
-
37
Source
GHS Signal Word
Warning
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GHS Precautionary statements
P261
-
P305+P351+P338
Source
P261
-
P305+P351+P338
-
P302+P352
-
P321
-
P405
-P501A
Source
MSDS Link
Download link
Source
Download link
Source
Download link
Source
Download link
Source
Download link
Source
Supplemental Hazard Statements
Contact with acids liberates toxic gas.
Source
Storage Warning
Air Sensitive
Source
TSCA Listed
是
Source
Physical Property
Melting Point
190 °C decomp.
Source
190°C dec.
Source
Odor
pungent (sulfur dioxide)
Source
Solubility
insoluble in ethanol
Source
450 g/l (20 °C) in water
Source
H2O: soluble0.1 M at 20 °C, clear, colorless
Source
White crystalline powder
Source
powder
Source
Powder
Source
2.34 g/cm
3
(solid)
Source
2.5-4.5 (25 °C, 0.1 M in H2O)
Source
3.5-4.5 (20 °C, 5%)
Source
Product Information
abs.
absorption0.1M/308 nm, H2O cut-off
Source
Cation Traces
Ba: ≤5 mg/kg
Source
Cd: ≤5 mg/kg
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Ca: ≤10 mg/kg
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Co: ≤5 mg/kg
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Li: ≤5 mg/kg
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Mn: ≤5 mg/kg
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Na: ≤1000 mg/kg
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Pb: ≤5 mg/kg
Source
Cu: ≤5 mg/kg
Source
Sr: ≤5 mg/kg
Source
Al: ≤5 mg/kg
Source
Ni: ≤5 mg/kg
Source
As: ≤0.1 mg/kg
Source
Bi: ≤5 mg/kg
Source
Fe: ≤5 mg/kg
Source
Cr: ≤5 mg/kg
Source
Mg: ≤5 mg/kg
Source
Mo: ≤5 mg/kg
Source
Zn: ≤5 mg/kg
Source
Ca: ≤50 mg/kg
Source
Cu: ≤50 mg/kg
Source
Co: ≤50 mg/kg
Source
Fe: ≤50 mg/kg
Source
Cd: ≤50 mg/kg
Source
Pb: ≤50 mg/kg
Source
Ni: ≤50 mg/kg
Source
Zn: ≤50 mg/kg
Source
As: ≤2 mg/kg
Source
Cu: ≤20 mg/kg
Source
Zn: ≤20 mg/kg
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Se: ≤5 mg/kg
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Fe: ≤10 mg/kg
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Pb: ≤2 mg/kg
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Hg: ≤1 mg/kg
Source
As: ≤1 mg/kg
Source
Zn: ≤10 mg/kg
Source
Cu: ≤10 mg/kg
Source
insoluble matter, passes filter test
Source
organic volatile impurities, complies (GC)
Source
51.8-57.6% sulfur dioxide
Source
residual solvents, in accordance
Source
≤0.001% heavy metals (as Pb)
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≤0.08% thiosulfate (S2O3)
Source
K2S2O5
Source
BioUltra
Source
≥97.0% (RT)
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≥96% (RT)
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≥98%
Source
95.0-101.0% (iodometric)
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≥96% (iodometric)
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95+%
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chloride (Cl-): ≤50 mg/kg
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chloride (Cl-): ≤100 mg/kg
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purum p.a.
Source
puriss.
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puriss. p.a.
Source
meets analytical specification of Ph.Eur., BP, NF, FCC, E224
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in accordance for appearance of solution
Source
Apperance
Density
pH
Impurities
Linear Formula
Product Line
Purity
Antion Traces
Grade
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