Epitochem

Sodium Starch Glycolate

Sodium starch glycolate is a white to off-white, odorless, tasteless powder. It consists of cross-linked carboxymethyl starch and exhibits high swelling properties upon contact with water, making it an effective tablet disintegrant.

Chemical Name and CAS Registry Number: Sodium carboxymethyl starch [9063-38-1]

Functional Category: Disintegrant

Pharmacopeial Specifications:

  • Identification: Positive for sodium and starch
  • pH (1% dispersion): 5.5–7.5
  • Loss on Drying: ≤10%
  • Degree of Substitution: 0.2–0.4
  • Microbial Limits: Complies with pharmacopeial requirements

Applications in Pharmaceutical Formulation:

Used as a superdisintegrant in tablets and capsules at 2-8% concentration. It facilitates rapid drug release by promoting disintegration in aqueous environments.

Comments:

Sodium starch glycolate is widely used due to its high swelling capacity and rapid disintegration properties. It is essential to optimize its concentration to prevent over-swelling, which may affect tablet integrity.