preservative. Sodium metabisulfite CAS NO.7681-57-4

Min.Order: 1 Kilogram
Payment Terms: T/T,MoneyGram,Other

Product Details

Keywords

Sodium metabisulfite
Sodium pyrosulfite
Natrium pyrosulfit

Quick Details

ProName: preservative. Sodium metabisulfite
CasNo: 7681-57-4
Molecular Formula: Na2O5S2
Appearance: white powder
Application: For analysis. Preservatives. reducing ...
DeliveryTime: 4-15 workdays
PackAge: 25kg/bag
Port: China any of port
ProductionCapacity: 500 Metric Ton/Month
Purity: 98
Storage: 1. It should be stored in a cool, dry ...
Transportation: by sea or air
LimitNum: 1 Kilogram

Superiority

1,Best Quality:

Our products have exported to Germany, Spain, UK, USA, Australia, Middle East, and so on other countries, and we have got very good feedback from our customers.so you can trust us.

2, Payment method: for example T/T, Westerm Union,other

3, Excellent Service: Best service and after-sales service to all clients.

1)We will ship the goods within 5days after get your payments.If you want to cancel or change order, please tell me within 24hours after you finish the payment..

2)We will ship the goods that you order from us by DHL, UPS, TNT and EUB.We will decided to choose which courier depend on different countries.To find the best way to delivery the goods for you.

3)As usual you can get the goods with in 4-7days.If the goods were lost or not received for other reasons, please contact us immediately.

4,Fast and safe delivery:

Sample Order : As usual you can get the goods within 4-7days. We can send it via HKems, HK Air Post, DHL or other methods.

We have a professional and stable logistics, and we can deliver the package smoothly around 3 to 5 days.

Bulk Order: Shipped via sea or air, it's according to your requirement, delivery time is 7-15days after payment.

Details

Sodium metabisulfite physicochemical properties

Density 1.48

Melting point 150 °C

Molecular formula Na2O5S2

Molecular weight 190.107

Exact quality 189.898254

PSA 124.92000

LogP 0.27220

Appearance traits White crystalline powder

Storage conditions

1. It should be stored in a cool, dry warehouse. The package is sealed and should be protected from air oxidation.

2. Pay attention to moisture. It should be protected from rain and sun exposure during transportation. It is strictly forbidden to store and transport with acids, oxidants and toxic and hazardous substances.

3. When there is a fire, use water and various fire extinguishers to save.

Stability

1. It is easily decomposed by moisture, and it is easily oxidized to sodium sulfate when exposed to air. Irritating.

2. Contact with strong acid to release sulfur dioxide to form the corresponding salt. Heat to 150 ° C decomposition. A white powder with a strong SO2 odor that loses SO2 in the air and absorbs O2 to convert to Na2SO4. Soluble in water, the aqueous solution is acidic. When the solution is heated to above 65 °C, it is decomposed into Na2SO3 and SO2.

Water solubility 540 g/L (20 oC)

Computing chemistry

1. Hydrophobic parameter calculation reference value (XlogP): none

2. Number of hydrogen bond donors: 0

3. Number of hydrogen bond acceptors: 6

4. Number of rotatable chemical bonds: 0

5. Number of tautomers: none

6. Topological molecular polarity surface area 125

7. Number of heavy atoms: 9

8. Surface charge: 0

9. Complexity: 136

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. Uncertainty of the number of atomic stereocenters: 0

13. Determine the number of chemical bond stereocenters: 0

14. Uncertain chemical bond number of stereocenters: 0

15. Number of covalent bond units: 3

1. Properties: white or yellowish crystalline powder with odor of sulfur dioxide

2. Density (g/mL 25oC): 1.48

3. Relative steam density (g/mL, air = 1): 1.10

4. Melting point (oC): 150

5. Boiling point (oC, atmospheric pressure): not determined

6. Boiling point (oC, 5.2kPa): not determined

7. Refractive index (n20/D): not determined

8. Flash point (oC,): not determined

9. Specific optical rotation (o): - not determined

10. Self-ignition point or ignition temperature (oC): not determined

11. Vapor pressure (kPa, 25oC): not determined

12. Saturated vapor pressure (kPa, 60oC): not determined

13. Heat of combustion (KJ/mol): not determined

14. Critical temperature (oC): not determined

15. Critical pressure (KPa): not determined

16. Logarithmic value of oil-water (octanol/water) partition coefficient (25 ° C): not determined

17. Upper explosion limit (%, V/V): not determined

18. Lower explosion limit (%, V/V): not determined

19. Solubility (mg/mL): soluble in water (54 g/100 ml water at 20 ° C; 81.7 g/100 ml water at 100 ° C), the aqueous solution is acidic. Soluble in glycerin, slightly soluble in ethanol

preservative. Sodium metabisulfite CAS NO.7681-57-4

Keywords

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