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Sodium Lignosulfonate

CAS No.: 8061-51-6
Molecular Weight: Varies g/mol
Chemical Formula Varies

Sodium lignosulfonate or Lignosulfonic Acid Sodium Salt is used in the food industry as a de-foaming agent, for paper production and in adhesives, for items that come in contact with food. It has preservative properties, and is used as an ingredient in animal feeds. It is also used for construction, ceramics, mineral powder, chemical industry, textile industry leather, metallurgical industry, petroleum industry, fire-retardant materials, rubber vulcanization, organic polymerization.

Sodium Lignosulfonate FCC Food Grade:
CAS 8061-51-6

DESCRIPTION
Sodium Lignosulfonate occurs as a brown, amorphous polymer. It is obtained from the spent sulfite and sulfate pulping liquor of wood or from the sulfate (kraft) pulping process. It may contain up to 30% reducing sugars. It is soluble in water, but not in any of the common organic solvents. The pH of a 1:100 aqueous solution is approximately between 3 and 11.
Function: Binder; dispersant; boiler water additive.

REQUIREMENTS
Identification:
A. A solution of 0.15 g of sample per liter of water gives positive tests for Sodium.
B. Dissolve 100 mg of sample in 50 mL of water. Add 1 mL each of 10% acetic acid and 10% sodium nitrite solutions to this solution. Mix the solution by swirling and allow it to stand for 15 min at room temperature. A brown color appears.
C. The ultraviolet absorption spectrum of a solution comprising 0.1 g of sample per liter at pH 5 exhibits a peak between 275 and 280 nm.
Assay: Not less than 5.0% sulfonate sulfur.
Lead: Not more than 1 mg/kg.
Loss on Drying: Not more than 10.0%.
Reducing Sugars: Not more than 30.0%.
Residue on Ignition: Not more than 20.0%.
Sodium: Not more than 10.0%.
Viscosity of a 50% Solution: Not more than 3000 centipoises.