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Home › Product Catalog › Sodium Metabisulphite Food Grade

Sodium Metabisulphite Food Grade

CAS 7681-57-4Na2S2O5MW 190.11

Sodium Metabisulphite Food Grade (CAS 7681-57-4) — formula Na2S2O5, molecular weight 190.11; category food and feed additives.

Specifications

CAS Number7681-57-4
Molecular FormulaNa2S2O5
Molecular Weight190.11
LogP-3.7
CategoryFood & Feed Additives

Purchase Profile

What this product is

Sodium Metabisulphite Food Grade is a food and feed compound with CAS registry number 7681-57-4 and molecular formula Na2S2O5 (molecular weight 190.11), belonging to the food and feed additives segment of chemical raw materials.

Identification

CAS number: 7681-57-4

Its molecular formula Na2S2O5 comprises 2 Na, 2 S, 5 O atoms.

Also known as: Sodium Metabisulphite Food Grade

Category: food and feed additives

Frequently Asked Questions

What is the CAS number of Sodium Metabisulphite Food Grade?

The CAS registry number of Sodium Metabisulphite Food Grade is 7681-57-4.

What is the molecular formula and molecular weight of Sodium Metabisulphite Food Grade?

Molecular formula Na2S2O5, molecular weight 190.11.

What other names is Sodium Metabisulphite Food Grade known by?

It is also registered under: Sodium Metabisulphite Food Grade.

Which category does Sodium Metabisulphite Food Grade belong to?

Category: Food & Feed Additives.

PubChem Public Data

Public-database records for Sodium Metabisulphite Food Grade (CAS 7681-57-4), reproduced here for independent cross-checking.

Safety classification and hazard statements

GHS notification summary0.4% (11 / 3060)
Reported hazard statementsH302, H318, H317, H334, H335, H402, H412, H320

H302: Harmful if swallowed [Warning Acute toxicity, oral]

H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]

Regulatory listings

Regulatory & Food ContactFDA Substance added to food: ANTIMICROBIAL AGENT, ANTIOXIDANT, COLOR OR COLORING ADJUNCT, DOUGH STRENGTHENER,
ANTIOXIDANT; FLOUR_TREATMENT_AGENT; PRESERVATIVE: Food Additives
ANTIMICROBIAL AGENT, ANTIOXIDANT, COLOR OR COLORING ADJUNCT, DOUGH STRENGTHENER, FLOUR TREATING AGENT, FREEZIN
JECFA ADI: 0-0.7 mg/kg bw
TRS 891-JECFA 51/30
FAS 42-JECFA 51/95
GHS notification summary0.4% (11 / 3060)

Physical description and handling notes

  • Sodium metabisulfite appears as a white crystalline or powder solid with a slight sulfur odor. Toxic by inhalation. Strongly irritates skin and tissue. Noncombustible, but may decompose to emit toxic oxide fumes of sulfur and sodium when heated to high temperature. A corrosive acid when mixed with water. Used as a food preservative and as a laboratory reagent.
  • Dry Powder; Other Solid; Wet Solid; Large Crystals; CBI; Liquid
  • White crystals or crystalline powder
  • White to yellowish crystals or powder with an odor of sulfur dioxide; [NIOSH]
  • WHITE POWDER WITH CHARACTERISTIC ODOUR.
  • White to yellowish crystals or powder with a slight odor of sulfur.

Reported physical properties

溶解度54 % (NIOSH, 2024)
溶解度66.7 g/100 g water at 25 °C
溶解度54%
密度2.36 g/cm³
密度1.4
密度1.4 @25 °C
LogP-3.7
Decomposition150 °C
pH4,0-5,5 (10 % aqueous solution)

How this substance is indexed

CAS Registry Number7681-57-4
PubChem CID656671
分子式Na2S2O5
UNII（FDA）4VON5FNS3C

Documented uses

  • CIR ingredient: Sodium Metabisulfite
  • Sodium and potassium metabisulfite are used as antioxidants in photographic film development. [Kanerva, p. 1637] Used as an antioxidant (food preservative, pharmaceutical aid, silage preservative; [HSDB] Used in the pickling stage of leather production; [PMID 21938525]
  • Leather Tanning and Processing [Category: Industry]
  • Photographic Processing [Category: Other]
  • Sodium Metabisulfite functions as reducing agents in cosmetic formulations. ... Sodium Bisulfite, and Sodium Metabisulfite /also/ function as antioxidants.
  • In foods, as preservative; lab reagent

Names this substance appears under

Sodium metabisulfite; 7681-57-4; Sodium pyrosulfite; Sodium disulfite; Disodium pyrosulfite; Natrii disulfis; Campden Tablets; Disodium metabisulfite; Natrium pyrosulfit; Natriummetabisulfit; sodium pyrosulphite; Sodium bisulfite anhydrous; Natrium metabisulfurosum; Sodium pyrosulfite (Na2S2O5); Disodium pentaoxodisulfate; 4VON5FNS3C

Computed molecular descriptors

分子量190.11
氢键供体数0
氢键受体数6
可旋转键数0
精确质量189.89825401
单同位素质量189.89825401
拓扑极性表面积125
重原子数9
形式电荷0
复杂度136

Database abstract

Sodium Metabisulphite Food Grade · CAS 7681-57-4 · Na2S2O5. UNII 4VON5FNS3C. 溶解度: 54 % (NIOSH, 2024); 溶解度: 66.7 g/100 g water at 25 °C; 溶解度: 54%.

Source: PubChem / Wikidata; the batch COA governs where values differ.

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