potassium metabisulfite
5 Inquiries
16731-55-8
Pharma Grade
99%
DAHAI BIOCHEM
25kg/Cardboard Drum
Yes
2026-12-31
HARD FAT
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Product Description
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Seller Information
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Inquiry History
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DescriptionECHEMI Editorial ReferenceWHITE CRYSTALLINE POWDER WITH PUNGENT ODOUR.
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.|DryPowder|Colourless crystals or white crystalline powder|WHITE CRYSTALLINE POWDER WITH PUNGENT ODOUR.
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.
White to slightly yellowish fine cryst. powder
Potassium disulfite (Potassium metabisulfite, PMB) is an inorganic salt with antimicrobial properties. It is a sulfiting agent that prevents browning of foods.Basic Info-
Product Name:
POTASSIUM METABISULFITE
Other Name:dipotassiumdisulfite;dipotassiummetabisulfite;Disulfurousacid,dipotassiumsalt;potassiummetabisulphate;pyrosulfurousacid,dipotassiumsalt;POTASSIUM METABISULFITE REAGENT;POTASSIUMMETABISULFITE,CRYSTAL,FCC;POTASSIUMMETABISULFITE,CRYSTAL,NF
CAS No.:16731-55-8
Molecular Formula:K2O5S2
InChIKeys:RWPGFSMJFRPDDP-UHFFFAOYSA-L
Molecular Weight:222.32
Exact Mass:221.84600
EC Number:240-795-3
UNII:65OE787Q7W
ICSC Number:1175
UN Number:1759
TSCA:TSCA listed
DSSTox ID:DTXSID1021293
Color/Form:White to slightly yellow
HScode:28322000
Categories:
Characteristics-
λmax:
267nm(H2O)(lit.)
PSA:124.92000
XLogP3:0.27220
Density:2.34 g/cm3
Melting Point:190°C
Water Solubility:Soluble in water. Insoluble in ethanol.
Storage Conditions:Keep dry and well closed.
Vapor Density:2.3 (vs air)
Toxicity:LD50 orally in Rabbit: 2300 mg/kg
Odor:Odorless
PH:2.5-4.5 (25℃, 0.1M in H2O)
Experimental Properties:Liberates SO2 with acids; oxidizes in air to sulfate, more readily in presence of moisture|It may catch fire if too much heat develops in powdering it.
Air and Water Reactions:Water soluble.
Reactive Group:Sulfite and Thiosulfate Salts
Reactivity Alerts:Strong Reducing Agent
Reactivity Profile:POTASSIUM METABISULFITE reacts with oxidizing agents to generate heat and products that may be flammable, combustible, or otherwise reactive. Can react explosively with strong oxidizing agents. Generates gaseous sulfur dioxide in contact with acids. Aqueous solutions are acidic and corrosive.
Critical Temperature & Pressure:Store at +5°C to +30°C.
Hazard IdentificationClassification of the substance or mixture
Serious eye damage, Category 1
GHS label elements, including precautionary statements
Pictogram(s) 
Signal word Danger
Hazard statement(s) H318 Causes serious eye damage
Precautionary statement(s) Prevention P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
Response P305+P354+P338 IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P317 Get medical help.
Storage none
Disposal none
Other hazards which do not result in classification
no data available
Handling and StoragePrecautions for safe handling
NO open flames. Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.
Conditions for safe storage, including any incompatibilities
Dry. Well closed. Keep in a well-ventilated room.Potassium metabisulfite should be stored in a cool, dark place.
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Seller Information
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Business Type:
Trader
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Main Products:
HARD FAT
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Location:
BUILDING 4,NO.571, STR.19,BAIYANG DISTRICT, HANGZHOU,CHINA
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Payment Terms:
TT against copy of documents,TT against B/L draft before shipment,100% TT in advance
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Total Annual Revenue:
Less than $1 million
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Total Employees:
5-10
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Year of Establishment:
2025
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Inquiry History5 Inquiries
Country Product Purchase Quantity Date Posted 
India
Sodium Metabisulfite Food Grade
1 Jun 27, 2025 
Brazil
Potassium Metabisulfite E224
1 20' Fcl Dec 27, 2024 
Burkina-faso
Métabisulfite de potassium en powder CAS 16731-55-8(E224) 99% Food grade
1.5 MT Mar 25, 2026
India
Potassium Metabisulfite, IP grade
1.00 KG Dec 9, 2024 
Bosnia and Herzegovina
potassium metabisulfite
10 KG Dec 19, 2023 Post an enquiry for this product
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