Description Uses Preparation Product Specification Health Hazard References
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Sodium metabisulfite

Description Uses Preparation Product Specification Health Hazard References
Product Name
Sodium metabisulfite
CAS No.
7681-57-4
Chemical Name
Sodium metabisulfite
Synonyms
Sodium pyrosulfite;Metabisulfite Sodium;Sodium pyrosulphite;Sodium disulphite;E223;Sodiummetabisufite;Disodium disulphite;fertisilo;Sodium metabisuL;SodiuM pyrosulfit
CBNumber
CB9854280
Molecular Formula
H2O5S2.2Na
Formula Weight
192.12
MOL File
7681-57-4.mol
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Sodium metabisulfite Property

Melting point:
>300 °C (lit.)
Density 
1.48
storage temp. 
Store at +5°C to +30°C.
solubility 
540 g/L (20°C)
form 
Powder/Solid
Specific Gravity
1.48
color 
White to slightly yellow
PH
3.5-5 (50g/l, H2O, 20℃)
Odor
Sulphorous
PH Range
4.5 at 50 g/l at 20 °C
Water Solubility 
540 g/L (20 ºC)
Sensitive 
Air & Moisture Sensitive
Merck 
14,8638
Exposure limits
ACGIH: TWA 5 mg/m3
NIOSH: TWA 5 mg/m3
Stability:
Stable. Incompatible with strong oxidizing agents, strong acids. Contact with strong acids releases a poisonous gas. May be moisture and air sensitive.
InChIKey
HRZFUMHJMZEROT-UHFFFAOYSA-L
CAS DataBase Reference
7681-57-4(CAS DataBase Reference)
EPA Substance Registry System
Sodium metabisulfite (7681-57-4)
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Safety

Hazard Codes 
Xn,Xi
Risk Statements 
22-31-41-36/37/38-52
Safety Statements 
26-39-46-36-16
RIDADR 
3260
OEB
B
OEL
TWA: 5 mg/m3
WGK Germany 
1
RTECS 
UX8225000
TSCA 
Yes
HS Code 
2832 10 00
PackingGroup 
III
Hazardous Substances Data
7681-57-4(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: 1540 mg/kg LD50 dermal Rat > 2000 mg/kg
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H302Harmful if swallowed

H318Causes serious eye damage

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
13459
Product name
Sodium metabisulfite
Purity
puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5%
Packaging
500g
Price
$46.6
Updated
2024/03/01
Sigma-Aldrich
Product number
13459
Product name
Sodium metabisulfite
Purity
puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5%
Packaging
1kg
Price
$57.1
Updated
2024/03/01
Sigma-Aldrich
Product number
13459
Product name
Sodium metabisulfite
Purity
puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5%
Packaging
5kg
Price
$133.8
Updated
2024/03/01
Sigma-Aldrich
Product number
1.06528
Product name
Sodium disulfite
Purity
(sodiummetabisulfite)foranalysisEMSURE?ACS,Reag.PhEur
Packaging
100g
Price
$43.3
Updated
2024/03/01
Sigma-Aldrich
Product number
13459
Product name
Sodium metabisulfite
Purity
puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5%
Packaging
4x5kg
Price
$724
Updated
2024/03/01
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Sodium metabisulfite Chemical Properties,Usage,Production

Description

Sodium metabisulfite (chemical formula: Na2S2O5) appears as a white crystalline or powder solid with a slight sulfur odor. It is toxic upon inhalation and can strongly irritate skin and tissue. It can be decomposed to release toxic oxide fumes of sulfur and sodium upon high temperature. It can be mixed with water to form a corrosive acid. It is generally used as disinfectant, antioxidant, and preservative agent as well as a laboratory reagent. As a kind of food additive, it can be used as a preservative and antioxidant in food. It can also be applied to the wine and beer making. Moreover, it can be used to sanitize the equipment of homebrew and winemaking as a cleaning agent. It also have various kinds of other applications, e.g. being applied to photography, as an excipients in some tablets, for water treatment, as a source of SO2 in wine, as a bactericide and as a bleaching reagent as well as reducing agent. It can be manufactured through the evaporation of a sodium bisulfite which has been saturated with sulfur dioxide. It should be warned that sodium metabisulfite has certain acute effects on the respiratory system, eyes and skin. In severe case, it can cause breathing difficulty and even pulmonary damage which finally leads to death. Therefore, effective protective measures and attention should be taken during the operation.

sodium metabisulfite powder

Uses

Sodium metabisulfite (SMBS, Sodium disulfite) is a white, granular solid sodium salt. an inorganic compound made up of sodium, sulfur, and oxygen, and used in many industries:

  1. in the pulp and paper industry, in the photographic industry and in the various other industries as a bleach or dechlorinator.
  2. Food Grade sodium metabisulfite may be used as a food preservative. It is also commonly added to various food products and wines as a preservative.
  3. Sodium metabisulfite can also be used in the manufacture of other chemicals, Used in production of cleaning agents, detergents, and soaps.
  4. It also acts as a corrosion inhibitor in oil and gas industry, as a bleaching agent in the production of coconut cream, as the source of sulfur dioxide and in the destruction of cyanide in commercial gold cyanidation processes.
  5. Gold mining industry: It is utilized in the precipitation of gold from auric acid as well as in the waste water treatment to remove hexavaent chromium as trivalent chromium by precipitation after reduction.
  6. Preservative in photo developer solutions, it is used in photography.
  7. Oxygen scavenge:it plays as an oxygen scavenger to eliminate the dissolved oxygen in wastewater and in pipes.
  8. Sodium metabisulfite may be used as an initiator during the cross-linking polymerization of polybutadiene in the cores of the vesicle membranes.
  9. It may be added as an antioxidant during the preparation of stock solutions of 6-hydroxydopamine in various studies.
  10. Dechlorination in municipal wastewater, pulp & paper, power, and textile water treatment plants.

Preparation

manufactures sodium metabisulfite by reacting sulfur dioxide with sodium carbonate (soda ash), purifying and drying to form crystals or powder.
Na2CO3 + 2SO2→Na2S2O5 + CO2

Product Specification

Sodium Metabisulfite, wt%
98.7% min.
Assay as SO2
66.5 min.
Insolubles, wt%
≤ 0.005
Chloride, wt%
≤ 0.05
Thiosulfate, wt%
≤ 0.05
Arsenic, ppm
≤ 1.0
Heavy metals, ppm
≤ 10.0
Iron as (Fe), ppm
≤ 2.0
Selenium, ppm
≤ 5.0
Lead as (Pb), ppm
≤ 2.0

Health Hazard

Sodium metabisulphite is currently listed in Annex III Part B of Directive 95/2/EC as an authorised food additive. As such food labelling is required where sulphite residues exceed 10 mg/kg (ppm). This is labelled E223 with maximum permitted residues in crustacean products set at 150 mg/kg. However it is now accepted that sulphites, when present in foodstuffs, can cause allergic reactions in vulnerable persons and can constitute a danger to health (Collins-Williams, 1983). Metabisulphite is regarded as one causative agent of asthma attacks (Gunnison & Jacobsen, 1987). In accordance with this, EU Directive 2003/89/EC will make allergen labelling a requirement for all food stuffs produced in the European Community, which have been treated with sodium metabisulphite.
Sodium metabisulfite typically found in consumer products should pose little a risk of symptoms due to skin or inhalation exposure since sodium metabisulfite is used in very low concentrations. Sodium metabisulfite can produce the following adverse health affects:

  1. Contact - Skin exposures can cause symptoms ranging from minor skin irritation or itching to redness and swelling. Eye exposure to sodium metabisulfite may result in redness, tearing or moderate eye irritation.
  2. Inhalation - The inhalation of sodium metabisulfite dusts can cause nose and throat irritation or coughing. Repeated or prolonged exposures may cause sore throat or nosebleeds. Inhalation may also cause severe respiratory reactions and aggravate asthma or other breathing diseases.
  3. Ingestion - The ingestion of sodium metabisulfite may cause irritation of the mouth and throat, nausea, vomiting and diarrhea.
  4. Other Effects - The International Agency for Research on Cancer (IARC) has not classified sodium metabisulfite as a carcinogen (cancer causing).

References

http://msdssearch.dow.com/PublishedLiteratureDOWCOM/dh_004f/0901b8038004f697.pdf
https://en.wikipedia.org/wiki/Sodium_metabisulfite
https://pubchem.ncbi.nlm.nih.gov/compound/Sodium_metabisulfite#section=Metabolism-Metabolites

Chemical Properties

Sodium metabisulfite is a white crystalline powder. Sulfur dioxide odor. It may be considered the anhydride of 2 molecules of sodium disulfite.

Chemical Properties

Sodium metabisulfite occurs as colorless, prismatic crystals or as a white to creamy-white crystalline powder that has the odor of sulfur dioxide and an acidic, saline taste. Sodium metabisulfite crystallizes from cold water as a hydrate containing seven water molecules.

Uses

Sodium Metabisulfite is a preservative and antioxidant that exists as crystals or powder having a sulfur dioxide odor. it is readily solu- ble in water. it is used in dried fruits to preserve flavor, color, and to inhibit undesirable microorganism growth. it prevents “black spots” due to oxidative deterioration in shrimp. it is used in maraschino cherries. it is found in lemon drinks as a preservative. see sulfur dioxide.

Uses

Pharmaceutic aid (antioxidant).

Uses

sodium metabisulfite is an anti-oxidant and reducing agent.

Production Methods

Sodium metabisulfite is prepared by saturating a solution of sodium hydroxide with sulfur dioxide and allowing crystallization to occur; hydrogen is passed through the solution to exclude air. Sodium metabisulfite may also be prepared by saturating a solution of sodium carbonate with sulfur dioxide and allowing crystallization to occur, or by thermally dehydrating sodium bisulfite.

Definition

ChEBI: An inorganic sodium salt composed of sodium and disulfite ions in a 2:1 ratio.

General Description

Sodium metabisulfite (MBS, Sodium disulfite) is an inorganic salt. It is the sodium salt of disulphurous (pyrosulfurous) acid. It is widely used in textile dyeing, photography and paper industry. It is also commonly added to various food products and wines as a preservative.

Hazard

Toxic by inhalation. Upper respiratory tract irritant. Questionable carcinogen.

Health Hazard

Sodium metabisulfite may cause bronchospasm, oculonasal symptoms, and urticaria in sulfite-sensitive individuals; irritation of mucous membranes may occur from inhalation of the dust.

Flammability and Explosibility

Non flammable

Pharmaceutical Applications

Sodium metabisulfite is used as an antioxidant in oral, parenteral, and topical pharmaceutical formulations, at concentrations of 0.01–1.0% w/v, and at a concentration of approximately 27% w/v in intramuscular injection preparations. Primarily, sodium metabisulfite is used in acidic preparations; for alkaline preparations, sodium sulfite is usually preferred. Sodium metabisulfite also has some antimicrobial activity, which is greatest at acid pH, and may be used as a preservative in oral preparations such as syrups.
In the food industry and in wine production, sodium metabisulfite is similarly used as an antioxidant, antimicrobial preservative, and antibrowning agent. However, at concentrations above about 550 ppm it imparts a noticeable flavor to preparations. Sodium metabisulfite usually contains small amounts of sodium sulfite and sodium sulfate.

Contact allergens

This agent is frequently used as a preservative in pharmaceutical products, in the bread-making industry as an antioxidant, and it can induce contact dermatitis. It can be used as a reducing agent in photography and caused dermatitis in a photographic technician, probably acting as an aggravating irritative factor. Sodium metabisulfite contains a certain amount of sodium sulfite and sodium sulfate.

Safety Profile

An inhalation hazard. Poison by intravenous route. Moderately toxic by parenteral route. Experimental reproductive effects. Mutation data reported. When heated to decomposition it emits toxic fumes of SOx and Na2O.

Safety

Sodium metabisulfite is widely used as an antioxidant in oral, topical, and parenteral pharmaceutical formulations; it is also widely used in food products.
Although it is extensively used in a variety of preparations, sodium metabisulfite and other sulfites have been associated with a number of severe to fatal adverse reactions. These are usually hypersensitivity-type reactions and include bronchospasm and anaphylaxis. Allergy to sulfite antioxidants is estimated to occur in 5–10% of asthmatics, although adverse reactions may also occur in nonasthmatics with no history of allergy.
Following oral ingestion, sodium metabisulfite is oxidized to sulfate and is excreted in urine. Ingestion may result in gastric irritation, owing to the liberation of sulfurous acid, while ingestion of large amounts of sodium metabisulfite can cause colic, diarrhea, circulatory disturbances, CNS depression, and death.
In Europe, the acceptable daily intake of sodium metabisulfite and other sulfites used in foodstuffs has been set at up to 3.5 mg/kg body-weight, calculated as sulfur dioxide (SO2). The WHO has similarly also set an acceptable daily intake of sodium metabisulfite, and other sulfites, at up to 7.0 mg/kg body-weight, calculated as sulfur dioxide (SO2).
LD50 (rat, IV): 0.12 g/kg

Potential Exposure

Sodium metabisulfite is used as an antioxidant in pharmaceutical preparations and as a preservative in foods. People with asthma have a greater chance of having an allergic reaction with this chemical. Individuals allergic to sodium bisulfite (a food preservative found in some wine, fresh shrimp; packaged foods; and restaurant salads and potatoes) may have a severe reaction when exposed to sodium metabisulfite.

Carcinogenicity

Sodium metabisulfite was genotoxic in mice in vivo as determined by chromosomal aberration, micronucleus, and sperm shape assays. It was not mutagenic in bacterial assays.

storage

On exposure to air and moisture, sodium metabisulfite is slowly oxidized to sodium sulfate with disintegration of the crystals. Addition of strong acids to the solid liberates sulfur dioxide.
In water, sodium metabisulfite is immediately converted to sodium (Na+) and bisulfite (HSO3-) ions. Aqueous sodium metabisulfite solutions also decompose in air, especially on heating. Solutions that are to be sterilized by autoclaving should be filled into containers in which the air has been replaced with an inert gas, such as nitrogen. The addition of dextrose to aqueous sodium metabisulfite solutions results in a decrease in the stability of the metabisulfite.
The bulk material should be stored in a well-closed container, protected from light, in a cool, dry place.

Shipping

UN1759 Corrosive solids, n.o.s., Hazard class: 8; Labels: 8-Corrosive material, Technical Name required. UN2693 Bisulfites, inorganic, aqueous solutions, n.o.s., Hazard class: 8; Labels: 8-Corrosive material.

Incompatibilities

Sodium metabisulfite reacts with sympathomimetics and other drugs that are ortho- or para-hydroxybenzyl alcohol derivatives to form sulfonic acid derivatives possessing little or no pharmacological activity. The most important drugs subject to this inactivation are epinephrine (adrenaline) and its derivatives. In addition, sodium metabisulfite is incompatible with chloramphenicol owing to a more complex reaction; it also inactivates cisplatin in solution.
It is incompatible with phenylmercuric acetate when autoclaved in eye drop preparations.
Sodium metabisulfite may react with the rubber caps of multidose vials, which should therefore be pretreated with sodium metabisulfite solution.

Incompatibilities

A strong reducing agent. Keep away from oxidizers. Mixtures with water forms a strong corrosive. Contact with acids releases toxic fumes. Heat causes decomposition. Slowly oxidized to the sulfate on exposure to air and moisture. Attacks metals

Regulatory Status

GRAS listed. Accepted for use as a food additive in Europe. Included in the FDA Inactive Ingredients Database (epidural;inhalation; IM and IV injections; ophthalmic solutions; oral preparations; rectal, topical, and vaginal preparations). Included in nonparenteral and parenteral medicines licensed in the UK. Included in the Canadian List of Acceptable Non-medicinal Ingredients.

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Sodium metabisulfite Suppliers

Sino Chem Mongolia Alliance Ltd.
Tel
131-10056998 13110056998
Fax
+86-022-23686656
Email
1919245352@qq.com
Country
China
ProdList
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60
Guangzhou Shuangyang Chemical Co., Ltd
Tel
13760839978
Fax
020-82521511
Email
1033002617@qq.com
Country
China
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31
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58
Jinan Jumeihui Chemical Co., Ltd
Tel
15098881566
Email
3512833729@QQ.com
Country
China
ProdList
39
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58
Shenzhen Boyimei Technology Co., Ltd
Tel
13926557530
Email
dndd@163.com
Country
China
ProdList
84
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58
J & K SCIENTIFIC LTD.
Tel
010-82848833 400-666-7788
Fax
86-10-82849933
Email
jkinfo@jkchemical.com
Country
China
ProdList
96815
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Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
021-61259108 18621169109
Fax
86-21-61259102
Email
market03@meryer.com
Country
China
ProdList
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Alfa Aesar
Tel
400-6106006
Fax
021-67582001/03/05
Email
saleschina@alfa-asia.com
Country
China
ProdList
30123
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84
Beijing HwrkChemical Technology Co., Ltd
Tel
010-89508211 18501085097
Fax
010-89508210
Email
sales.bj@hwrkchemical.com
Country
China
ProdList
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Energy Chemical
Tel
021-021-58432009 400-005-6266
Fax
021-58436166
Email
sales8178@energy-chemical.com
Country
China
ProdList
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Beijing Ouhe Technology Co., Ltd
Tel
010-82967028 13552068683
Fax
+86-10-82967029
Email
2355560935@qq.com
Country
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View Lastest Price from Sodium metabisulfite manufacturers

WUHAN FORTUNA CHEMICAL CO., LTD
Product
Sodium metabisulfite 7681-57-4
Price
US $0.00/KG
Min. Order
25KG
Purity
98%min
Supply Ability
30tons/month
Release date
2023-02-03
Hebei Zhuanglai Chemical Trading Co.,Ltd
Product
Sodium metabisulfite 7681-57-4
Price
US $10.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
20ton
Release date
2024-05-21
Hebei Longbang Technology Co., Ltd
Product
Sodium metabisulfite 7681-57-4
Price
US $6.00/kg
Min. Order
1kg
Purity
More than 99%
Supply Ability
2000KG/Month
Release date
2024-05-27

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