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CAS 16731-55-8 Potassium Disulfite molecular structure lightbox
CAS RN: 16731-55-8

Potassium Disulfite

Product Availability

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11 package records10 with current stock4 grade groups
Batch No.PackageAvailabilityWarehouseInquiry
Batchno.20260525 100g Out of stock Inquiry
Batchno.20260516 2.5kg In stock Inquiry
Batch No.PackageAvailabilityWarehouseInquiry
Batchno.20250414 25g / 100g / 500g Confirm by inquiry Shanghai Inquiry
Batch No.PackageAvailabilityWarehouseInquiry
Batchno.20250423 100g In stock Inquiry
Batchno.20251031 2.5kg In stock Inquiry
Batchno.20250906 25g In stock Inquiry
Batchno.20250810 500g In stock Inquiry
Batch No.PackageAvailabilityWarehouseInquiry
Batchno.20251027 10kg In stock Chongqing Inquiry
Batchno.20260402 12X500g In stock Shanghai, Shandong Inquiry
Batchno.20250727 2.5kg In stock Shanghai, Shandong, Guangdong, Hebei Inquiry
Batchno.20251230 500g In stock Shanghai, Shandong, Guangdong, Chongqing, Hebei Inquiry
  • Product code: SSC-072984
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Historical Factory Record

Historical Supply Reference

This product has historical factory records. Recorded pack sizes and purity can be used as a supply reference, while project-specific availability is confirmed by inquiry.

  • Pack sizes on record: 500g
  • Available purity: ≥95%
  • Inventory rows with stock: 0
  • Bulk packaging: confirmed by inquiry
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Reference Pack Sizes

Reference pack sizes are shown below. Final availability, packaging and delivery schedule are confirmed by inquiry.

Recorded sizes, purity and stock details for CAS 16731-55-8
Pack Size Recorded Purity Available Qty Ship From Inquiry
500g ≥95% 0 Out of Stock Shanghai Inquiry

16731-55-8 / Potassium Disulfite

Standard CAS: 16731-55-8 Multi CAS: No
Basic Information Physical Properties Computed Properties Safety & Transport

Basic Information

CAS
16731-55-8
Multi CAS
No
Molecular Formula
K2O5S2
Molecular Weight
222.330000
Exact Mass
221.846128
SMILES
[O-]S(=O)S(=O)(=O)[O-].[K+].[K+]
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

Physical Properties

Melting Point
Decomposes at approximately 150 °C
Density
2.3 g/cu cm Relative density (water = 1): 2.34
Physical Description
Potassium metabisulfite appears as a white granular or powdery solid with a sharp odor of sulfur dioxide. Decomposes at 150 to 190 °C. Density 2.3 g / cm3. Contact severely irritates skin, eyes, and mucous membranes. Low toxicity. Used as a food preservative and an antioxidant. Other Solid; Dry Powder Colourless crystals or white crystalline powder A white granular or powdery solid with a sharp odor of sulfur dioxide; [CAMEO] WHITE CRYSTALLINE POWDER WITH PUNGENT ODOUR.
Appearance
White crystals or crystalline powder White powder
State
Solid

Computed Properties

Structural Parameters

Heavy atom count
9
Rotatable bonds
1
H-bond acceptors
5
Molar refractivity
18.62
TPSA
97.33

LogP / Solubility

WLOGP
-7.67
MLOGP
-6.74
XLogP3
-7.67
Consensus LogP
-7.36
Log S (ESOL)
3.68
Class (ESOL)
Highly soluble
Log S (Ali)
4.15
Class (Ali)
Highly soluble
Log S (SILICOS-IT)
5.14
Class (SILICOS-IT)
Highly soluble

ADME

GI absorption
Low
BBB permeant
No
P-gp substrate
No
CYP1A2 inhibitor
No
CYP2C19 inhibitor
No
CYP2C9 inhibitor
No
CYP2D6 inhibitor
No
CYP3A4 inhibitor
No
Log Kp (skin permeation)
-9.52

Drug-likeness / Medicinal Chemistry

Lipinski
Yes
Ghose
No
Veber
Yes
Egan
Yes
Muegge
No
Bioavailability score
0.55
Brenk alerts
1
Leadlikeness
No
Synthetic Accessibility
2

Safety & Transport

Pictogram(s)
Corrosive Irritant
Signal
Danger
GHS Hazard Statements
H315 (90%): Causes skin irritation [Warning Skin corrosion/irritation] H318 (13.7%): Causes serious eye damage [Danger Serious eye damage/eye irritation] H335 (84%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation] H302: Harmful if swallowed [Warning Acute toxicity, oral] H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]
Precautionary Statement Codes
P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P354+P338, P317, P319, P321, P332+P317, P362+P364, P403+P233, P405, and P501 P264, P264+P265, P270, P280, P301+P317, P305+P354+P338, P317, P330, and P501
DOT ID (UN/NA Number)
2693

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