Sodium Metabisulfite Photo Grade

Appearance:White crystalline powder

CAS No:7681-57-4

EINECS No:231-673-0

Synonyms:Sodium Pyrosulfite, SMBS

Molecular Formula:Na2S2O5

Molecular Weight:190.107

Melting Point:150℃ (Decomposed)

Density:1.48 g/cm³

Accurate Mass:189.898254

Water Solubility:540g/L (20 ℃)

Get a Quote

Tianya Chemical is the leading manufacturer and supplier of Sodium Metabisulfite in China, we produce and supply high quality Sodium Metabisulfite Photo Grade product. Our Sodium Metabisulfite Photo Grade product is with white color, gentle color, transparent and clear solution.

Function & Application Of Sodium Metabisulfite Photo Grade

Sodium metabisulfite is used for a fixer ingredient in the photography industry. The product can be applied for not only general photography but medical X-ray film. Sodium metabisulfite photo grade is a basic component of developer and fixer as stabilizing agent in photography.

The developing powder in the photography industry mainly consists of sodium sulfite anhydrous, sodium carbonate, potassium bromide, prednisone, and hydroquinone. The fixing powder mainly consists of sodium metabisulfite, sodium thiosulfate and sodium sulfite anhydrous.

The developing solution is to reduce the photosensitive silver halide in the emulsion layer of the photosensitive material to metallic silver. The developer is an alkaline solution, and adjust the reduction strength of the developer based on the strength of alkalinity, strong alkalinity and strong developing effect. Usually, the pH of the developing solution of film is 7-10, and the pH of the developing solution of photographic paper is 10.

Developer dissolved in alkaline aqueous solutions will lose their developing effect due to oxidation, therefore, it is necessary to add an antioxidant to the solution. Protective agents represented by sodium metabisulfite can achieve the goal of preventing oxidation. According to it, dissolving sodium metabisulfite in the developing solution can prolong the service life of the developing solution.

Fixing powder is prone to decompose and precipitate sulfur in acidic aqueous solutions due to the action of acid, aqueous solutions like this can’t be used as fixing solution.

To prevent sodium thiosulfate from being decomposed by acid, the protective agent sodium metabisulfite can be used. Sodium metabisulfite is dissolved in aqueous solution of sodium thiosulfate and can react with the decomposed thiosulfate in the form of acid, has the ability to restore thiosulfate, making the fixing solution more stable.

Package, Loading & Storage

Standard packing: 25 Kg plastic woven bag with PE inner/jumbo bag

Customized packaging accepted

Loading: 25MT with pallet; 27MT without pallet

Storage: Store at a cool, dry, and ventilated storehouse.

The product is with hygroscopicity, packaging should be sealed to prevent air oxidation.

Prohibited to store and transport together with acids, oxidants, and harmful and toxic substances.

Technical Data Sheet

Sodium Metabisulfite Photo Grade TDS

Specifications

Items Specification
Purity (As Na2S2O5 ) 97% Min
Sulfur Dioxide (SO2) 65% Min
Sodium Sulfite (Na2SO3) 0.6% Max
Sodium Thiosulfate (Na2S2O3) 0.04% Max
Heavy Metal (Pb) 0.0005% Max
Arsenic (As) 0.0001% Max
Selenium (Se) 0.0005% Max
Chloride (Cl) 0.02% Max
Lead (Pb) 0.00005% Max
Iron (Fe) 0.001% Max
Water Insoluble 0.02% Max
PH Value 4.0-4.8

FAQs

1. What is minimum order quantity of Tianya’s sodium metabisulfite products?

Our minimum order quantity of sodium metabisulfite is 1 ton, anyway, based cost-effective, we recommend the MOQ of one 20′ container.

2. Is Tianya a manufacturer of sodium metabisulfite or a trading company?

Tianya is a manufacturer of Sodium Metabisulfite products in China, we produce sodium metabisulfite products with more than 20 years with rich experience.

3. What certifications has Tianya’s sodium metabisulfite products got?

Our sodium metabisulfite products have got the certifications of Halal, Kosher, ISO, NSF, etc..

4. What kinds of payment terms do you accept?

We can accept the common payment terms TT, L/C, DP, DA, etc..

5. How long is the lead time of your sodium metabisulfite products?

We always keep regular quantity of stock goods, and we produce fresh sodium metabisulfite goods based customers’ orders. We prepare goods and book shipping within one week, usually goods can be delivered within 7 to 10 days after order confirmation.

6. How do you transport sodium metabisulfite goods to customers?

The available modes of transportation includes transportations by sea, by air, by railway, by truck, etc.. If conditions permit, sea shipment is the most preferred mode of transportation by customers, considering the most economical transportation of bulk chemicals.

7. How long can I receive your reply after I send an inquiry of sodium metabisulfite or ask some questions?

We can reply to you within 2 hours during working hours, within 24 hours during nonworking time.

8. What is the price of sodium metabisulfite?

The price of sodium metabisulfite is influenced by some factors, such as raw materials, freight, exchange rate, off-season and peak-season, etc.. Tianya is the leading manufacturer of sodium metabisulfite in China, we always keep offering highly competitive price to customers.

9. What is the raw materials of sodium metabisulfite products?

The main raw materials of sodium metabisulfite products are soda ash and sulfur.

10. How long is the shelf life of sodium metabisulfite?

The shelf life of sodium metabisulfite is 2 years under the premise of following storage rules.

11. What is the standard package of your sodium metabisulfite products?

Our standard package of sodium metabisulfite products are 25 Kg bag, or jumbo bag. Jumbo bags includes 1000 Kg, 1100 kg, 1200 Kg, 1250 kg bag.

12. Can you accept customized packages and labels?

Yes, we can supply customized packages and labels based customers’ requirements.

13. Can you accept OEM/ODM?

Yes, OEM/ODM is available.

14. How many tons of sodium metabisulfite can one container load?

For sodium metabisulfite products loading, 20′ container is recommended. One 20′ container can load 27 tons sodium metabisulfite without pallet, 25 tons with pallet. Anyway, during actual loading, we remind customers to note limited max weight regulated by local road transportation and/or destination ports.

15. What kinds of pallets can you supply if necessary?

For sodium metabisulfite products, we supply the two kinds of standard pallets: plywood pallets and wooden pallets. Customers also can specify their preferred pallets types.

16. Does the supplied pallets for sodium metabisulfite have fumigation certification?

Yes. For plywood pallet, it is fumigation free. For wooden pallet, it is given fumigation. They can totally meet regulations of related countries.

17. Do you have food manufacturing license of sodium metabisulfite?

Yes, we have the food manufacturing license of sodium metabisulfite, and we produce sodium metabisulfite food grade products with high quality.

18. Do you accept to visit or inspect your factory?

Yes, we welcome customers to visit us and inspect our factory.

19. How will you handle it in case your goods has some problems?

For the quality of our sodium metabisulfite products, until now it is zero compliant. In case any problem, we have complete after-sales service policy.

20. What is the differences of your sodium metabisulfite food grade and industrial grade?

Sodium metabisulfite food grade has the requirements for clarity and heavy metal (lead) content, while industrial grade doesn’t have the requirements for these two items. For detailed specifications differences, pls view Specification of Sodium Metabisulfite Food Grade & Specification of Sodium Metabisulfite Industrial Grade. In addition, sodium metabisulfite food grade has the specified regulations for production equipment and workshop.

Sodium Metabisulfite Photo Grade

Appearance:White crystalline powder

CAS No:7681-57-4

EINECS No:231-673-0

Synonyms:Sodium Pyrosulfite, SMBS

Molecular Formula:Na2S2O5

Molecular Weight:190.107

Melting Point:150℃ (Decomposed)

Density:1.48 g/cm³

Accurate Mass:189.898254

Water Solubility:540g/L (20 ℃)

Get a Quote

Tianya Chemical is the leading manufacturer and supplier of Sodium Metabisulfite in China, we produce and supply high quality Sodium Metabisulfite Photo Grade product. Our Sodium Metabisulfite Photo Grade product is with white color, gentle color, transparent and clear solution.

Function & Application Of Sodium Metabisulfite Photo Grade

Sodium metabisulfite is used for a fixer ingredient in the photography industry. The product can be applied for not only general photography but medical X-ray film. Sodium metabisulfite photo grade is a basic component of developer and fixer as stabilizing agent in photography.

The developing powder in the photography industry mainly consists of sodium sulfite anhydrous, sodium carbonate, potassium bromide, prednisone, and hydroquinone. The fixing powder mainly consists of sodium metabisulfite, sodium thiosulfate and sodium sulfite anhydrous.

The developing solution is to reduce the photosensitive silver halide in the emulsion layer of the photosensitive material to metallic silver. The developer is an alkaline solution, and adjust the reduction strength of the developer based on the strength of alkalinity, strong alkalinity and strong developing effect. Usually, the pH of the developing solution of film is 7-10, and the pH of the developing solution of photographic paper is 10.

Developer dissolved in alkaline aqueous solutions will lose their developing effect due to oxidation, therefore, it is necessary to add an antioxidant to the solution. Protective agents represented by sodium metabisulfite can achieve the goal of preventing oxidation. According to it, dissolving sodium metabisulfite in the developing solution can prolong the service life of the developing solution.

Fixing powder is prone to decompose and precipitate sulfur in acidic aqueous solutions due to the action of acid, aqueous solutions like this can’t be used as fixing solution.

To prevent sodium thiosulfate from being decomposed by acid, the protective agent sodium metabisulfite can be used. Sodium metabisulfite is dissolved in aqueous solution of sodium thiosulfate and can react with the decomposed thiosulfate in the form of acid, has the ability to restore thiosulfate, making the fixing solution more stable.

Package, Loading & Storage

Standard packing: 25 Kg plastic woven bag with PE inner/jumbo bag

Customized packaging accepted

Loading: 25MT with pallet; 27MT without pallet

Storage: Store at a cool, dry, and ventilated storehouse.

The product is with hygroscopicity, packaging should be sealed to prevent air oxidation.

Prohibited to store and transport together with acids, oxidants, and harmful and toxic substances.

Technical Data Sheet

Sodium Metabisulfite Photo Grade TDS

Specifications

Items Specification
Purity (As Na2S2O5 ) 97% Min
Sulfur Dioxide (SO2) 65% Min
Sodium Sulfite (Na2SO3) 0.6% Max
Sodium Thiosulfate (Na2S2O3) 0.04% Max
Heavy Metal (Pb) 0.0005% Max
Arsenic (As) 0.0001% Max
Selenium (Se) 0.0005% Max
Chloride (Cl) 0.02% Max
Lead (Pb) 0.00005% Max
Iron (Fe) 0.001% Max
Water Insoluble 0.02% Max
PH Value 4.0-4.8

FAQs

1. What is minimum order quantity of Tianya’s sodium metabisulfite products?

Our minimum order quantity of sodium metabisulfite is 1 ton, anyway, based cost-effective, we recommend the MOQ of one 20′ container.

2. Is Tianya a manufacturer of sodium metabisulfite or a trading company?

Tianya is a manufacturer of Sodium Metabisulfite products in China, we produce sodium metabisulfite products with more than 20 years with rich experience.

3. What certifications has Tianya’s sodium metabisulfite products got?

Our sodium metabisulfite products have got the certifications of Halal, Kosher, ISO, NSF, etc..

4. What kinds of payment terms do you accept?

We can accept the common payment terms TT, L/C, DP, DA, etc..

5. How long is the lead time of your sodium metabisulfite products?

We always keep regular quantity of stock goods, and we produce fresh sodium metabisulfite goods based customers’ orders. We prepare goods and book shipping within one week, usually goods can be delivered within 7 to 10 days after order confirmation.

6. How do you transport sodium metabisulfite goods to customers?

The available modes of transportation includes transportations by sea, by air, by railway, by truck, etc.. If conditions permit, sea shipment is the most preferred mode of transportation by customers, considering the most economical transportation of bulk chemicals.

7. How long can I receive your reply after I send an inquiry of sodium metabisulfite or ask some questions?

We can reply to you within 2 hours during working hours, within 24 hours during nonworking time.

8. What is the price of sodium metabisulfite?

The price of sodium metabisulfite is influenced by some factors, such as raw materials, freight, exchange rate, off-season and peak-season, etc.. Tianya is the leading manufacturer of sodium metabisulfite in China, we always keep offering highly competitive price to customers.

9. What is the raw materials of sodium metabisulfite products?

The main raw materials of sodium metabisulfite products are soda ash and sulfur.

10. How long is the shelf life of sodium metabisulfite?

The shelf life of sodium metabisulfite is 2 years under the premise of following storage rules.

11. What is the standard package of your sodium metabisulfite products?

Our standard package of sodium metabisulfite products are 25 Kg bag, or jumbo bag. Jumbo bags includes 1000 Kg, 1100 kg, 1200 Kg, 1250 kg bag.

12. Can you accept customized packages and labels?

Yes, we can supply customized packages and labels based customers’ requirements.

13. Can you accept OEM/ODM?

Yes, OEM/ODM is available.

14. How many tons of sodium metabisulfite can one container load?

For sodium metabisulfite products loading, 20′ container is recommended. One 20′ container can load 27 tons sodium metabisulfite without pallet, 25 tons with pallet. Anyway, during actual loading, we remind customers to note limited max weight regulated by local road transportation and/or destination ports.

15. What kinds of pallets can you supply if necessary?

For sodium metabisulfite products, we supply the two kinds of standard pallets: plywood pallets and wooden pallets. Customers also can specify their preferred pallets types.

16. Does the supplied pallets for sodium metabisulfite have fumigation certification?

Yes. For plywood pallet, it is fumigation free. For wooden pallet, it is given fumigation. They can totally meet regulations of related countries.

17. Do you have food manufacturing license of sodium metabisulfite?

Yes, we have the food manufacturing license of sodium metabisulfite, and we produce sodium metabisulfite food grade products with high quality.

18. Do you accept to visit or inspect your factory?

Yes, we welcome customers to visit us and inspect our factory.

19. How will you handle it in case your goods has some problems?

For the quality of our sodium metabisulfite products, until now it is zero compliant. In case any problem, we have complete after-sales service policy.

20. What is the differences of your sodium metabisulfite food grade and industrial grade?

Sodium metabisulfite food grade has the requirements for clarity and heavy metal (lead) content, while industrial grade doesn’t have the requirements for these two items. For detailed specifications differences, pls view Specification of Sodium Metabisulfite Food Grade & Specification of Sodium Metabisulfite Industrial Grade. In addition, sodium metabisulfite food grade has the specified regulations for production equipment and workshop.

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